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  • @CodeStock 2012 Review: Leon Gersing ( @Rubybuddha ) - "You"

    "YOU"Speaker: Leon GersingTwitter: @Rubybuddha Site: http://about.me/leongersing I honestly had no idea what I was getting in to when I sat down in to this session. I basically saw the picture of the speaker and knew that it would be a good session. I was completely wrong; it was the BEST SESSION of CodeStock 2012.  In fact it was so good, I texted another coworker attending the conference to get over and listen to Leon. Leon took on the concept of growth in the software development community. He specifically referred David Hansson in his ability to stick to his beliefs when the development community thought that he was crazy for creating Ruby on Rails. If you do not know this story Ruby on Rails is one of the fastest growing web languages today. In addition, he also touched on the flip side of this argument in that we must be open to others ideas and not discard them so quickly because we all come from differing perspectives and can add value to a project/team/community. This session left me with two very profound concepts/quotes: “In order to learn you must do it badly in front of a crowed and fail.” - @Rubybuddha I can look back on my career so far and say that he is correct; I think I have learned the most after failing, especially when I achieved this failure in front of other. “Experts must be able to fail.” - @Rubybuddha I think we can all learn from our own mistakes but we can also learn from others. When respected experts fail it is a great learning opportunity for the entire team as well as the person who failed. When expert admit mistakes and how they worked through them can be great learning tools for other developers so that they know how to avoid specific scenarios and if they do become stuck in the same issue they will know how to properly work their way out of them.

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  • The year ahead, 2011.

    - by andrewstopford
    When I look back at last years look at 2010 my blogging rate has not changed much (I suspect this is largely down to using Twitter a lot) but my interests this year have developed a lot further. My view on 2010 would be that Microsoft would commit more to OSS, while I wanted to see more hires from that audience and more projects on Outercurve foundation instead there has been support for JQuery and Gems (aka NuGet). I would love to see more from Microsoft on the OSS front in 2011, Outercurve could become like the Apache foundation with enough support. Staying on the Microsoft front I predict that 2011 will bring the following. C# 5.0 will go RTM (still no MOP though) The next release of VS will go alpha or early beta MS MVC 4.0 (I think by Mix time) and maybe this release will get a command line. I also suspect that Microsoft will want to target the tablet market with WP7 in 2011 (Mix 2011 maybe...). I also predict the following Java will fork with Apache\Google. Oracle will then take them to court and the whole thing will boil right through 2011 (Java have had enough court cases, come on guys). Java and the JVM will sadly not move forward at all in 2011. Android will cause Apple a serious headache, both the smartphone and tablet market will see figures cut from Apple share. By the end of 2011 the current 70% apple market share will be 40-50%. As the features, performance and price of Android devices gets ever better Apple will be left out in the open. Lastly after 7 years I intend to move this blog away from weblogs. In 2011 I will be exploring Java, Ruby\Rails and Android and such subjects don't make sense to talk about it here. See you in 2011.

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  • Making simple forms in web applications

    - by levalex
    How do you work with forms in your web applications? I am not talking about RESTful applications, I don't want to build heavy front-end using frameworks like Backbone. For example, I need to add "contact us" form. I need to check data which was filled by user and tell him that his data was sent. Requirements: I want to use AJAX. I want to validate form on back-end side and don't want to duplicate the same code on front-end side. I have my own solution, but it doesn't satisfy me. I make an AJAX request with serialized data on form submit and get response. The next is checking "Content-type" header. html - It means that errors with filling form are exists and response html is form with error labels. - I will replace my form with response html. json and response.error_code == 0 - It means that form was successfully submited. - I will show user notification about success. json and response.error_code != 0 - Something was broken on back-end (like connection with database). other - I display the following message : We have been notified and have started to work with that problem. Please, try it later. The problem of that way is that I can't use it with forms that upload file. What is your practise? What libraries and principles do you use?

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  • How to parse JSON data from web more faster [closed]

    - by Kaidul Islam Sazal
    I have json inventory inventory.json on the server like this: [ { "body" : "SUV", "color" : { "ext" : "White diamond pearl", "int" : "Taupe" }, "id" : "276181", "make" : "Acura", "miles" : 35949, "model" : "RDX", "pic" : [ { "full" : "http://images1.dealercp.com/90961/000JNBD/001_0292.jpg" } ], "power" : { "drive" : "Front wheel drive", "eng" : "2.3L DOHC PGM-FI 16-VALVE", "trans" : "Automatic" }, "price" : { "net" : 29488 }, "stock" : "6942", "trim" : "AWD 4dr Tech Pkg SUV", "vin" : "5J8TB2H53BA000334", "year" : 2011 }, { "body" : "Sedan", "color" : { "ext" : "Premium white pearl", "int" : "Taupe" }, "id" : "275622", "make" : "Acura", "miles" : 40923, "model" : "TSX", "pic" : [ { "full" : "http://images1.dealercp.com/90961/000JMC6/001_1765.jpg" } ], "power" : { "drive" : "Front wheel drive", "eng" : "2.4L L4 MPI DOHC 16V", "trans" : "Automatic" }, "price" : { "net" : 22288 }, "stock" : "6945", "trim" : "4dr Sdn I4 Auto Sedan", "vin" : "JH4CU2F66AC011933", "year" : 2010 } ] here are two index, There are almost 5000 index like this. I parsed this json like this: var url = "inventory/inventory.json"; $.getJSON(url, function(data){ $.each(data, function(index, item){ //straight-forward loop if(item.year == 2012) { $('#desc').append(item.make + ' ' + item.model + ' ' + '<br/>' + item.price.net + '<br/>' + item.pic[0].full); } }); }); This is working fine.But the problem is that, this searching and fetching process is little bit slow as there are 5000 indexes already and it's increasing day by day. It seems that, it is a straight-forward loop to parse the data and a normal brute-force method. Now I want to know if there any time efiicient way to parse more faster.Any faster method to parse instead of straight-forward loop ?

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  • @CodeStock 2012 Review: Leon Gersing ( @Rubybuddha ) - "You"

    "YOU"Speaker: Leon GersingTwitter: @Rubybuddha Site: http://about.me/leongersing I honestly had no idea what I was getting in to when I sat down in to this session. I basically saw the picture of the speaker and knew that it would be a good session. I was completely wrong; it was the BEST SESSION of CodeStock 2012.  In fact it was so good, I texted another coworker attending the conference to get over and listen to Leon. Leon took on the concept of growth in the software development community. He specifically referred David Hansson in his ability to stick to his beliefs when the development community thought that he was crazy for creating Ruby on Rails. If you do not know this story Ruby on Rails is one of the fastest growing web languages today. In addition, he also touched on the flip side of this argument in that we must be open to others ideas and not discard them so quickly because we all come from differing perspectives and can add value to a project/team/community. This session left me with two very profound concepts/quotes: “In order to learn you must do it badly in front of a crowed and fail.” - @Rubybuddha I can look back on my career so far and say that he is correct; I think I have learned the most after failing, especially when I achieved this failure in front of other. “Experts must be able to fail.” - @Rubybuddha I think we can all learn from our own mistakes but we can also learn from others. When respected experts fail it is a great learning opportunity for the entire team as well as the person who failed. When expert admit mistakes and how they worked through them can be great learning tools for other developers so that they know how to avoid specific scenarios and if they do become stuck in the same issue they will know how to properly work their way out of them.

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  • PowerShell a constant in a changing world

    - by Rob Addis
    I've been programming for about 20 years now some of my friends have been at it for over 30. I have read many, many manuals and yes it's not my favourite past time. So 10 years ago I made a promise to myself to try and only learn about products which have long life times. I immediately gave up programming GUIs and concentrated on back end development as I decided that these products (Oracle, MQ Series, SQL Server, BizTalk and later WCF, WF) have longer life times and smaller incremental changes than front end products.10 years ago I had no idea how good a decision that would turn out to be. There have been so many different Microsoft products for the front end in that time; multiple versions of Windows Forms, FrontPage, Html, Javascript, ASP.net, Silverlight, SharePoint, WPF and now hopefully a stayer Metro.I remember being at a Microsoft conference in 2006 when Martin Fowler told a crowd of developers (I'm paraphrasing) "If you don't like change then you're in the wrong business!". Well I've been in the business for 20 years and yes I'm a little resistant to change. I like my investment in reading manuals and getting certified to be time well spent!Over the last 2 years I have been writing A LOT of PowerShell script, I think there is a good chance this product will still be around and be used for new development in 10 years, learning it is a good investment.

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  • Why don't windows of the same application behave as they should?

    - by Yuttadhammo
    Somewhere along the upgrade path, Unity has developed some strange logic behind window layering. First, before Oneiric, there was a way to see all the windows of an application - I think it was when you click on the icon in the launcher. Now, clicking on the icon often does nothing. Suppose I have two terminals open, one behind this Firefox window, and one in front of it. Clicking on the launcher does nothing - the only way to find the second terminal, afaics, is to move the Firefox window or use the task switcher. Secondly, once I have both terminals on top, then I decide to close one of them, suddenly they both disappear (the second one, for some reason, has gone into hiding behind the Firefox window). Third (though I can't pin it down now), sometimes when a window is on top, focus is still on a window in back; I click on the top x to close the window in front, only to find I've closed an important window in the back. (Update: this question details the problem) I can't really believe these are bugs, since they seem too obvious to not have been fixed by now. My question is, am I missing something? Some compiz option I can set to make it act like it used to? Or is this really how Unity is supposed to act?

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  • Oracle Exalogic Customer Momentum @ OOW'12

    - by Sanjeev Sharma
    [Adapted from here]  At Oracle Open World 2012, i sat down with some of the Oracle Exalogic early adopters  to discuss the business benefits these businesses were realizing by embracing the engineered systems approach to data-center modernization and application consolidation. Below is an overview of the 4 businesses that won the Oracle Fusion Middleware Innovation Award for Oracle Exalogic this year. Company: Netshoes About: Leading online retailer of sporting goods in Latin America.Challenges: Rapid business growth resulted in frequent outages and poor response-time of online store-front Conventional ad-hoc approach to horizontal scaling resulted in high CAPEX and OPEX Poor performance and unavailability of online store-front resulted in revenue loss from purchase abandonment Solution: Consolidated ATG Commerce and Oracle WebLogic running on Oracle Exalogic.Business Impact:Reduced abandonment rates resulting in a two-digit increase in online conversion rates translating directly into revenue up-liftCompany: ClaroAbout: Leading communications services provider in Latin America.Challenges: Support business growth over the next 3  - 5 years while maximizing re-use of existing middleware and application investments with minimal effort and risk Solution: Consolidated Oracle Fusion Middleware components (Oracle WebLogic, Oracle SOA Suite, Oracle Tuxedo) and JAVA applications onto Oracle Exalogic and Oracle Exadata. Business Impact:Improved partner SLA’s 7x while improving throughput 5X and response-time 35x for  JAVA applicationsCompany: ULAbout: Leading safety testing and certification organization in the world.Challenges: Transition from being a non-profit to a profit oriented enterprise and grow from a $1B to $5B in annual revenues in the next 5 years Undertake a massive business transformation by aligning change strategy with execution Solution: Consolidated Oracle Applications (E-Business Suite, Siebel, BI, Hyperion) and Oracle Fusion Middleware (AIA, SOA Suite) on Oracle Exalogic and Oracle ExadataBusiness Impact:Reduced financial and operating risk in re-architecting IT services to support new business capabilities supporting 87,000 manufacturersCompany: Ingersoll RandAbout: Leading manufacturer of industrial, climate, residential and security solutions.Challenges: Business continuity risks due to complexity in enforcing consistent operational and financial controls; Re-active business decisions reduced ability to offer differentiation and compete Solution: Consolidated Oracle E-business Suite on Oracle Exalogic and Oracle ExadataBusiness Impact:Service differentiation with faster order provisioning and a shorter lead-to-cash cycle translating into higher customer satisfaction and quicker cash-conversionCheck out the winners of the Oracle Fusion Middleware Innovation awards in other categories here.

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  • How do you convince the client their application's backend needs a rewrite?

    - by Richard DesLonde
    I have been supporting a LOB winforms application for a client the last 3 years. The application is built with a simple monolithic architecture and uses .NET 2.0. The application is a core part of their operations and its longevity is paramount. It needs to evolve with their evolving business processes, as well as implement improved functionality etc....this brings me to believe that this application needs an overhaul of sorts on the back-end. The problem is changing a back-end is "invisible"...i.e. the user never actually sees it. It's a quality of the system that is changing (stability, maintainability, reliability, longevity), not some functional requirement that will be easily seen...i.e. the ROI is not obvious. There is a lot of new functionality to be added to the front-end as well (user experience). I am considering a strategy of changing the back-end over time...i.e. when making a change or adding a feature to the front-end, change those components in the back-end that are affected, eventually you get to everything. How do I convince the client that we need to rebuild the back-end?

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  • KDE: How can I select audio output device for mplayer?

    - by grimripper
    I recently installed Kubuntu 13.10 64-bit, and I'm having a problem with selecting audio output device. In Phonon, when I select audio device preference order and press Apply, Amarok and Dragon will immediately switch to the preferred device. VLC and SMplayer are not affected. VLC has its own setting for selecting the output device, but SMplayer remains a problem. It always plays audio on internal audio, and I can't change output to HDMI. How can I select HDMI for SMplayer's audio output device? I don't know if it matters, but when I select HDMI audio in Phonon and click Test, the test sound plays on the internal audio output as well. In the hardware settings tab, the front left and front right test buttons play audio on HDMI. Also, volume up/down buttons affect HDMI volume when SMplayer is focused. This would make sense if I could get SMplayer to play audio over HDMI, but it would be better if the volume keys affected SMplayer's own volume, or the "mplayer2: audio stream" which appears in volume control while mplayer is playing. EDIT: I've recompiled mplayer with alsa support, and can now select the audio output device from SMplayer's settings. Didn't affect the issue with Phonon of course, but it's a suitable workaround.

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  • Strategy for hosting 700+ domains, each with static HTML site

    - by jonschlinkert
    I have a portfolio of more than 700 domain names, and ideally I'd like to put up a single-page HTML/CSS/JavaScript webpage for each domain. Is there a system/strategy/workflow that will allow me to: Automate the deployment of new websites, quickly and easily without having to manually initiate each new website in an admin panel. For instance, I've seen dropbox-based solutions that claim to make it simple to setup new websites on your dropbox account, but you still have to set each one up in an admin interface first. It would be so much easier to have a folder naming convention that allowed the user to easily clone/copy/duplicate sites inside their Dropbox App folder (https://www.dropbox.com/developers/blog/23) to create new ones. Sounds interesting, however... It's easy to managing CNAMEs on the registrar-side, is there a way to quickly associate CNAMEs with new websites, maybe gh-pages-style (https://help.github.com/articles/setting-up-a-custom-domain-with-pages)? With GitHub's gh-pages, all you have to do is drop a file called CNAME into your repo, with the domain name you want associated with the repo inside the file. gh-pages isn't a good solution for what I'm doing though unfortunately. I'm also a front-end developer, specializing in rapid web development and "front-end build systems", so I building and maintaining static assets for hundreds of sites is no problem. It's the hosting-side that I really struggle with. Any suggestions?

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  • Why do I have an error when adding states in slick?

    - by SystemNetworks
    When I was going to create another state I had an error. This is my code: public static final int play2 = 3; and public Game(String gamename){ this.addState(new mission(play2)); } and public void initStatesList(GameContainer gc) throws SlickException{ this.getState(play2).init(gc, this); } I have an error in the addState. above the above code. I don't know where is the problem. But if you want the whole code it is here: package javagame; import org.newdawn.slick.*; import org.newdawn.slick.state.*; public class Game extends StateBasedGame{ public static final String gamename = "NET FRONT"; public static final int menu = 0; public static final int play = 1; public static final int train = 2; public static final int play2 = 3; public Game(String gamename){ super(gamename); this.addState(new Menu(menu)); this.addState(new Play(play)); this.addState(new train(train)); this.addState(new mission(play2)); } public void initStatesList(GameContainer gc) throws SlickException{ this.getState(menu).init(gc, this); this.getState(play).init(gc, this); this.getState(train).init(gc, this); this.enterState(menu); this.getState(play2).init(gc, this); } public static void main(String[] args) { try{ AppGameContainer app =new AppGameContainer(new Game(gamename)); app.setDisplayMode(1500, 1000, false); app.start(); }catch(SlickException e){ e.printStackTrace(); } } } //SYSTEM NETWORKS(C) 2012 NET FRONT

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  • Strategy for hosting 700+ domains names, each with a static HTML site

    - by jonschlinkert
    I have a portfolio of more than 700 domain names, and ideally I'd like to put up a single-page HTML/CSS/JavaScript webpage for each domain. Is there a system/strategy/workflow that will allow me to: Automate the deployment of new websites, quickly and easily without having to manually initiate each new website in an admin panel. For instance, I've seen dropbox-based solutions that claim to make it simple to setup new websites on your dropbox account, but you still have to set each one up in an admin interface first. It would be so much easier to have a folder naming convention that allowed the user to easily clone/copy/duplicate sites inside their Dropbox App folder (https://www.dropbox.com/developers/blog/23) to create new ones. Sounds interesting, however... It's easy to manage CNAMEs on the registrar-side, but is there a way to quickly associate CNAMEs with new websites (on the hosting side), maybe using the method offered by gh-pages-style (https://help.github.com/articles/setting-up-a-custom-domain-with-pages)? With GitHub's gh-pages, all you have to do is drop a file called CNAME into your repo, with the domain name you want associated with the repo inside the file. gh-pages isn't a good solution for what I'm doing though unfortunately. I'm also a front-end developer, specializing in rapid web development and "front-end build systems", so I building and maintaining static assets for hundreds of sites is no problem. It's the hosting-side that I really struggle with. Any suggestions?

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  • Please, tell us how you made Agile work for you?

    - by Paul
    I've been seeing many questions related to Agile. There seems to be confusion between the people who are doing Agile successfully, and those of us who don't understand it. So I'm wondering if some of the successful teams would be willing to give the result of us some examples of how you succeeded. Some of the things I know I wonder What steps did you use? (ie. Talk to users, mock up, tests, code, testing, (whatever)) Tools that helped you? Did you generate any artifacts, other than a working implementation? How did you prevent spaghetti architecture / code? How do you pass along to new team members, or is the team stable for the project How did you determine exit criteria, or was it open ended. (Scope of project?) Did you do this as contracting? How did you develop a contract up-front? Did the business do any up front work? Or did they come to the table with "We want to implement a "bleh bleh blah"? What types of tests did you use? Unit, Integration, UAT? Or did the process make some/all of those unnecessary? Bonus: Do you have an situations / links to "How To" Agile articles, books, etc? Wiki, describes what but not how (to the uninitiated) At least to me, not a duplicate

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  • Maintaining C/C++/Java skills as a web developer

    - by wwwuser
    When I was in college I learned how to program in C, C++, and Java. Currently, I'm a web developer using front end and back end technologies (HTML/CSS/JS, PHP, MYSQL). While the sorting algorithms and OOP concepts that I learned in college can be applied to web development, I'm looking for ways to keep up my knowledge of all languages. I enjoy programming in C-Style (C/C++/Java) languages and front-end/back-end technologies. Unfortunately, there aren't many options to use C-style languages to build websites. However, I would like to keep up my knowledge and skills in the languages I learned in college as I know they will continue to help me with my growth. What resources are available to keep challenging myself in C-style languages that are relevant to web development? Would contract work for C-style languages be beneficial? Are there sites that offer algorithm challenges? Any help is appreciated. I'm also interested in how others that have asked themselves this have solved this problem.

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  • Why don't windows of the same application behave as they should in Oneiric?

    - by Yuttadhammo
    Somewhere along the upgrade path, Unity has developed some strange logic behind window layering. First, before Oneiric, there was a way to see all the windows of an application - I think it was when you click on the icon in the launcher. Now, clicking on the icon often does nothing. Suppose I have two terminals open, one behind this Firefox window, and one in front of it. Clicking on the launcher does nothing - the only way to find the second terminal, afaics, is to move the Firefox window or use the task switcher (which has a whole slew of problems of its own). Secondly, once I have both terminals on top, then I decide to close one of them, suddenly they both disappear (the second one, for some reason, has gone into hiding behind the Firefox window). Third (though I can't pin it down now), sometimes when a window is on top, focus is still on a window in back; I click on the top x to close the window in front, only to find I've closed an important window in the back. I can't really believe these are bugs, since they seem too obvious to not have been fixed by now. My question is, am I missing something? Some compiz option I can set to make it act like it used to? Or is this really how Unity is supposed to act?

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  • HP SmartArray P400: How to repair failed logical drive?

    - by TegtmeierDE
    I have a HP Server with SmartArray P400 controller (incl. 256 MB Cache/Battery Backup) with a logicaldrive with replaced failed physicaldrive that does not rebuild. This is how it looked when I detected the error: ~# /usr/sbin/hpacucli ctrl slot=0 show config Smart Array P400 in Slot 0 (Embedded) (sn: XXXX) array A (SATA, Unused Space: 0 MB) logicaldrive 1 (698.6 GB, RAID 1, OK) physicaldrive 1I:1:1 (port 1I:box 1:bay 1, SATA, 750 GB, OK) physicaldrive 1I:1:2 (port 1I:box 1:bay 2, SATA, 750 GB, OK) array B (SATA, Unused Space: 0 MB) logicaldrive 2 (2.7 TB, RAID 5, Failed) physicaldrive 1I:1:3 (port 1I:box 1:bay 3, SATA, 750 GB, OK) physicaldrive 1I:1:4 (port 1I:box 1:bay 4, SATA, 750 GB, OK) physicaldrive 2I:1:5 (port 2I:box 1:bay 5, SATA, 750 GB, OK) physicaldrive 2I:1:6 (port 2I:box 1:bay 6, SATA, 750 GB, Failed) physicaldrive 2I:1:7 (port 2I:box 1:bay 7, SATA, 750 GB, OK) unassigned physicaldrive 2I:1:8 (port 2I:box 1:bay 8, SATA, 750 GB, OK) ~# I thought that I had drive 2I:1:8 configured as a spare for Array A and Array B, but it seems this was not the case :-(. I noticed the problem due to I/O errors on the host, even if only 1 physicaldrive of the RAID5 is failed. Does someone know why this could happen? The logicaldrive should go into "Degraded" mode but still be fully accessible from the host os!? I first tried to add the unassigned drive 2I:1:8 as a spare to logicaldrive 2, but this was not possible: ~# /usr/sbin/hpacucli ctrl slot=0 array B add spares=2I:1:8 Error: This operation is not supported with the current configuration. Use the "show" command on devices to show additional details about the configuration. ~# Interestingly it is possible to add the unassigned drive to the first array without problems. I thought maybe the controller put the array into "failed" state due to the missing spare and protects failed arrays from modification. So I tried was to reenable the logicaldrive (to add the spare afterwards): ~# /usr/sbin/hpacucli ctrl slot=0 ld 2 modify reenable Warning: Any previously existing data on the logical drive may not be valid or recoverable. Continue? (y/n) y Error: This operation is not supported with the current configuration. Use the "show" command on devices to show additional details about the configuration. ~# But as you can see, re-enabling the logicaldrive this was not possible. Now I replaced the failed drive by hotswapping it with the unassigned drive. The status now looks like this: ~# /usr/sbin/hpacucli ctrl slot=0 show config Smart Array P400 in Slot 0 (Embedded) (sn: XXXX) array A (SATA, Unused Space: 0 MB) logicaldrive 1 (698.6 GB, RAID 1, OK) physicaldrive 1I:1:1 (port 1I:box 1:bay 1, SATA, 750 GB, OK) physicaldrive 1I:1:2 (port 1I:box 1:bay 2, SATA, 750 GB, OK) array B (SATA, Unused Space: 0 MB) logicaldrive 2 (2.7 TB, RAID 5, Failed) physicaldrive 1I:1:3 (port 1I:box 1:bay 3, SATA, 750 GB, OK) physicaldrive 1I:1:4 (port 1I:box 1:bay 4, SATA, 750 GB, OK) physicaldrive 2I:1:5 (port 2I:box 1:bay 5, SATA, 750 GB, OK) physicaldrive 2I:1:6 (port 2I:box 1:bay 6, SATA, 750 GB, OK) physicaldrive 2I:1:7 (port 2I:box 1:bay 7, SATA, 750 GB, OK) ~# The logical drive is still not accessible. Why is it not rebuilding? What can I do? FYI, this is the configuration of my controller: ~# /usr/sbin/hpacucli ctrl slot=0 show Smart Array P400 in Slot 0 (Embedded) Bus Interface: PCI Slot: 0 Serial Number: XXXX Cache Serial Number: XXXX RAID 6 (ADG) Status: Enabled Controller Status: OK Chassis Slot: Hardware Revision: Rev E Firmware Version: 5.22 Rebuild Priority: Medium Expand Priority: Medium Surface Scan Delay: 15 secs Surface Analysis Inconsistency Notification: Disabled Raid1 Write Buffering: Disabled Post Prompt Timeout: 0 secs Cache Board Present: True Cache Status: OK Accelerator Ratio: 25% Read / 75% Write Drive Write Cache: Disabled Total Cache Size: 256 MB No-Battery Write Cache: Disabled Cache Backup Power Source: Batteries Battery/Capacitor Count: 1 Battery/Capacitor Status: OK SATA NCQ Supported: True ~# Thanks for you help in advance.

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  • SATA drive problems with two SIL RAID cards

    - by Jon Topper
    I've just put a second SiI 3114 SATARaid card in my home server so that I could add another pair of SATA drives and increase my storage space. Annoyingly, it doesn't seem to work: [ 32.816030] ata5: lost interrupt (Status 0x0) [ 32.816072] ata5.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen [ 32.816091] ata5.00: cmd c8/00:08:00:00:00/00:00:00:00:00/e0 tag 0 dma 4096 in [ 32.816094] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout) [ 32.816101] ata5.00: status: { DRDY } [ 32.816117] ata5: hard resetting link [ 33.136082] ata5: SATA link down (SStatus 0 SControl 0) [ 36.060940] irq 18: nobody cared (try booting with the "irqpoll" option) [ 36.060949] Pid: 0, comm: swapper Not tainted 2.6.31-20-generic #58-Ubuntu [ 36.060954] Call Trace: [ 36.060977] [] ? printk+0x18/0x1c [ 36.060997] [] __report_bad_irq+0x27/0x90 [ 36.061005] [] note_interrupt+0x150/0x190 [ 36.061011] [] handle_fasteoi_irq+0xac/0xd0 [ 36.061023] [] handle_irq+0x18/0x30 [ 36.061029] [] do_IRQ+0x47/0xc0 [ 36.061042] [] ? irq_exit+0x50/0x70 [ 36.061058] [] ? smp_apic_timer_interrupt+0x57/0x90 [ 36.061065] [] common_interrupt+0x30/0x40 [ 36.061075] [] ? native_safe_halt+0x5/0x10 [ 36.061082] [] default_idle+0x46/0xd0 [ 36.061088] [] cpu_idle+0x8c/0xd0 [ 36.061103] [] rest_init+0x55/0x60 [ 36.061111] [] start_kernel+0x2e6/0x2ec [ 36.061117] [] ? unknown_bootoption+0x0/0x19e [ 36.061133] [] i386_start_kernel+0x7c/0x83 [ 36.061137] handlers: [ 36.061139] [] (sil_interrupt+0x0/0xb0) [ 36.061151] Disabling IRQ #18 [ 38.136014] ata5: hard resetting link [ 38.456022] ata5: SATA link down (SStatus 0 SControl 0) [ 43.456013] ata5: hard resetting link [ 43.776022] ata5: SATA link down (SStatus 0 SControl 0) [ 43.776035] ata5.00: disabled [ 43.776055] ata5.00: device reported invalid CHS sector 0 [ 43.776074] sd 4:0:0:0: [sde] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE [ 43.776082] sd 4:0:0:0: [sde] Sense Key : Aborted Command [current] [descriptor] [ 43.776092] Descriptor sense data with sense descriptors (in hex): [ 43.776097] 72 0b 00 00 00 00 00 0c 00 0a 80 00 00 00 00 00 [ 43.776112] 00 00 00 00 [ 43.776118] sd 4:0:0:0: [sde] Add. Sense: No additional sense information [ 43.776127] end_request: I/O error, dev sde, sector 0 [ 43.776136] Buffer I/O error on device sde, logical block 0 [ 43.776170] ata5: EH complete [ 43.776187] ata5.00: detaching (SCSI 4:0:0:0) root@core:~# cat /proc/interrupts CPU0 0: 47 IO-APIC-edge timer 1: 8 IO-APIC-edge i8042 6: 3 IO-APIC-edge floppy 7: 0 IO-APIC-edge parport0 8: 0 IO-APIC-edge rtc0 9: 0 IO-APIC-fasteoi acpi 14: 53069 IO-APIC-edge pata_sis 15: 53004 IO-APIC-edge pata_sis 17: 112265 IO-APIC-fasteoi sata_sil 18: 200002 IO-APIC-fasteoi sata_sil, SiS SI7012 19: 111140 IO-APIC-fasteoi eth0 20: 0 IO-APIC-fasteoi ohci_hcd:usb2 21: 0 IO-APIC-fasteoi ohci_hcd:usb3 23: 0 IO-APIC-fasteoi ehci_hcd:usb1 NMI: 0 Non-maskable interrupts LOC: 6650492 Local timer interrupts SPU: 0 Spurious interrupts CNT: 0 Performance counter interrupts PND: 0 Performance pending work RES: 0 Rescheduling interrupts CAL: 0 Function call interrupts TLB: 0 TLB shootdowns TRM: 0 Thermal event interrupts THR: 0 Threshold APIC interrupts MCE: 0 Machine check exceptions MCP: 160 Machine check polls ERR: 0 MIS: 0 root@core:~# lspci | grep Raid 00:09.0 RAID bus controller: Silicon Image, Inc. SiI 3114 [SATALink/SATARaid] Serial ATA Controller (rev 02) 00:0a.0 RAID bus controller: Silicon Image, Inc. SiI 3114 [SATALink/SATARaid] Serial ATA Controller (rev 02) root@core:~# lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 9.10 Release: 9.10 Codename: karmic root@core:~# uname -a Linux core.topper.me.uk 2.6.31-20-generic #58-Ubuntu SMP Fri Mar 12 05:23:09 UTC 2010 i686 GNU/Linux I've tried a combination of different kernel options (irqpoll, noapic, noacpi, pci=noapic) all to no avail. Does anyone have any bright ideas about how I can go about making this work? Swapping PCI cards around isn't an option as there are only two slots in this motherboard (an ASRock K7S41GX). The BIOS doesn't look to have too much in the way of configuration options regarding IRQ usage. Plan B is to ditch this server completely and buy a new QNAP for these drives to go in, but I was hoping to avoid doing this right now.

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  • Can't sync filesystem without reboot

    - by Fabio
    I'm having an issue with a linux server. Once a week the running mysql instance hangs and there is no way to fully stop it. If I kill it, it remains in zombie status and init does not reap its pid. The server is used for staging deployments and some internal tools, so it's not under heavy load. The only process constantly used id mysql and for this I think that it's the only process which suffer of this issue. I've searched system logs for errors and the only thing I found is this error (repeated a couple of times) in dmesg output: [706560.640085] INFO: task mysqld:31965 blocked for more than 120 seconds. [706560.640198] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [706560.640312] mysqld D ffff88032fd93f40 0 31965 1 0x00000000 [706560.640317] ffff880242a27d18 0000000000000086 ffff88031a50dd00 ffff880242a27fd8 [706560.640321] ffff880242a27fd8 ffff880242a27fd8 ffff88031e549740 ffff88031a50dd00 [706560.640325] ffff88031a50dd00 ffff88032fd947f8 0000000000000002 ffffffff8112f250 [706560.640328] Call Trace: [706560.640338] [<ffffffff8112f250>] ? __lock_page+0x70/0x70 [706560.640344] [<ffffffff816cb1b9>] schedule+0x29/0x70 [706560.640347] [<ffffffff816cb28f>] io_schedule+0x8f/0xd0 [706560.640350] [<ffffffff8112f25e>] sleep_on_page+0xe/0x20 [706560.640353] [<ffffffff816c9900>] __wait_on_bit+0x60/0x90 [706560.640356] [<ffffffff8112f390>] wait_on_page_bit+0x80/0x90 [706560.640360] [<ffffffff8107dce0>] ? autoremove_wake_function+0x40/0x40 [706560.640363] [<ffffffff8112f891>] filemap_fdatawait_range+0x101/0x190 [706560.640366] [<ffffffff81130975>] filemap_write_and_wait_range+0x65/0x70 [706560.640371] [<ffffffff8122e441>] ext4_sync_file+0x71/0x320 [706560.640376] [<ffffffff811c3e6d>] do_fsync+0x5d/0x90 [706560.640379] [<ffffffff811c40d0>] sys_fsync+0x10/0x20 [706560.640383] [<ffffffff816d495d>] system_call_fastpath+0x1a/0x1f When this happens the only way to make everything working again is a full reboot, but in order to do that I'm forced to use this command after I've manually stopped all running processes echo b > /proc/sysrq-trigger otherwise normal reboot process hangs forever. I've tracked reboots script and I've found out that also the reboot process hangs on a sync call, this one in /etc/init.d/sendsigs (I'm on ubuntu) # Flush the kernel I/O buffer before we start to kill # processes, to make sure the IO of already stopped services to # not slow down the remaining processes to a point where they # are accidentily killed with SIGKILL because they did not # manage to shut down in time. sync I'm almost sure that the cause of this is an hardware issue (the RAID controller???) also because I've other two machines with the same hardware and software configuration and they don't suffer of this, but I can't find any hint in syslog or dmesg. I've also installed smartmontools and mcelog packages but none of them did report any issue. What can I do to track the cause of this issue? Today is happened again, here is the status of system after triggering a reboot init---console-kit-dae---64*[{console-kit-dae}] +-dbus-daemon +-mcelog +-mysqld---{mysqld} +-newrelic-daemon---newrelic-daemon---11*[{newrelic-daemon}] +-ntpd +-polkitd---{polkitd} +-python3 +-rpc.idmapd +-rpc.statd +-rpcbind +-sh---rc---S20sendsigs---sync +-smartd +-snmpd +-sshd---sshd---zsh---sudo---zsh---pstree +-sshd---sshd---zsh---sudo---zsh And here is the status of sync process # ps aux | grep sync root 3637 0.1 0.0 4352 372 ? D 05:53 0:00 sync i.e. Uninterruptible sleep... Hardware specs as reported by lshw I think the raid controller is a fake raid. I usually don't deal with hardware (and for the record I don't have physical access to it) description: Computer product: X7DBP () vendor: Supermicro version: 0123456789 serial: 0123456789 width: 64 bits capabilities: smbios-2.4 dmi-2.4 vsyscall32 configuration: administrator_password=disabled boot=normal frontpanel_password=unknown keyboard_password=unknown power-on_password=disabled uuid=53D19F64-D663-A017-8922-0030487C1FEE *-core description: Motherboard product: X7DBP vendor: Supermicro physical id: 0 version: PCB Version serial: 0123456789 *-firmware description: BIOS vendor: Phoenix Technologies LTD physical id: 0 version: 6.00 date: 05/29/2007 size: 106KiB capacity: 960KiB capabilities: pci pnp upgrade shadowing escd cdboot bootselect edd int13floppy2880 acpi usb ls120boot zipboot biosbootspecification *-storage description: RAID bus controller product: 631xESB/632xESB SATA RAID Controller vendor: Intel Corporation physical id: 1f.2 bus info: pci@0000:00:1f.2 version: 09 width: 32 bits clock: 66MHz capabilities: storage pm bus_master cap_list configuration: driver=ahci latency=0 resources: irq:19 ioport:18a0(size=8) ioport:1874(size=4) ioport:1878(size=8) ioport:1870(size=4) ioport:1880(size=32) memory:d8500400-d85007ff

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  • libvirt upgrade caused vms to not see drives (boot media not found)

    - by bias
    I upgraded to Ubuntu 12.04.1 and now libvirt (via open nebula) successfully runs vms but they aren't finding the 2 drives (specifically, the boot drive). One is "hd" the other is "cdrom". The machine boots but fails and displays something like "boot media not found hd" (this was in a vnc terminal and I didn't copy the output anywhere so that's not the verbatim message). I tried constructing a new disk using the new version of qemu (via vmbuilder) and this new machine has the same problem as the old machine. In case it matters (I can't see why it would) I'm using open nebula to manage the machines. There's nothing relevant in any of the logs: syslog, libvirtd, oned. Which is to say nothing interesting/anomalous is reported when the machine is brought up. Versions libvirt 0.9.8-2ubuntu17.4 qemu-kvm 1.0+noroms-0ubuntu14.3 The libvirt xml config portions (relavent) <os> <type arch='x86_64' machine='pc-1.0'>hvm</type> <boot dev='hd'/> </os> ... <devices> <emulator>/usr/bin/kvm</emulator> <disk type='file' device='disk'> <driver name='qemu' type='qcow2'/> <source file='/var/lib/one//203/images/disk.0'/> <target dev='sda' bus='scsi'/> <alias name='scsi0-0-0'/> <address type='drive' controller='0' bus='0' unit='0'/> </disk> <disk type='file' device='cdrom'> <driver name='qemu' type='raw'/> <source file='/var/lib/one//203/images/disk.1'/> <target dev='sdc' bus='scsi'/> <readonly/> <alias name='scsi0-0-2'/> <address type='drive' controller='0' bus='0' unit='2'/> </disk> <controller type='scsi' index='0'> <alias name='scsi0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </controller> <memballoon model='virtio'> <alias name='balloon0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/> </memballoon> ... </devices> The libvirt/qemu log contains 2012-11-25 22:19:24.328+0000: starting up LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin QEMU_AUDIO_DRV=none /usr/bin/kvm -S -M pc-1.0 -enable-kvm -m 256 -smp 1,sockets=1,cores=1,threads=1 -name one-204 -uuid 4be6c276-19e8-bdc2-e9c9-9ca5352f2be3 -nodefconfig -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/one-204.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -device lsi,id=scsi0,bus=pci.0,addr=0x5 -drive file=/var/lib/one//204/images/disk.0,if=none,id=drive-scsi0-0-0,format=qcow2 -device scsi-disk,bus=scsi0.0,scsi-id=0,drive=drive-scsi0-0-0,id=scsi0-0-0,bootindex=1 -drive file=/var/lib/one//204/images/disk.1,if=none,media=cdrom,id=drive-scsi0-0-2,readonly=on,format=raw -device scsi-disk,bus=scsi0.0,scsi-id=2,drive=drive-scsi0-0-2,id=scsi0-0-2 -netdev tap,fd=18,id=hostnet0 -device rtl8139,netdev=hostnet0,id=net0,mac=02:00:c0:a8:00:68,bus=pci.0,addr=0x3 -netdev tap,fd=19,id=hostnet1 -device rtl8139,netdev=hostnet1,id=net1,mac=02:00:ad:f0:1b:94,bus=pci.0,addr=0x4 -usb -vnc 0.0.0.0:204 -vga cirrus -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x6 kvm: -device rtl8139,netdev=hostnet0,id=net0,mac=02:00:c0:a8:00:68,bus=pci.0,addr=0x3: pci_add_option_rom: failed to find romfile "pxe-rtl8139.rom" kvm: -device rtl8139,netdev=hostnet1,id=net1,mac=02:00:ad:f0:1b:94,bus=pci.0,addr=0x4: pci_add_option_rom: failed to find romfile "pxe-rtl8139.rom"

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  • Unable to connect to Samba printer

    - by user127236
    I have a headless Ubuntu 12.04 server for files and printers. It shares files via Samba just fine. However, the HP PSC-750xi connected to the server via USB is not accessible from my Ubuntu 12.04 laptop. I can browse for it in the Printing control panel, but any attempt to authenticate my ID to the printer with my user credentials results in the error "This print share is not accessible". I have included the Samba smb.conf file below. Any help appreciated. Thanks... JGB # # Sample configuration file for the Samba suite for Debian GNU/Linux. # # # This is the main Samba configuration file. You should read the # smb.conf(5) manual page in order to understand the options listed # here. Samba has a huge number of configurable options most of which # are not shown in this example # # Some options that are often worth tuning have been included as # commented-out examples in this file. # - When such options are commented with ";", the proposed setting # differs from the default Samba behaviour # - When commented with "#", the proposed setting is the default # behaviour of Samba but the option is considered important # enough to be mentioned here # # NOTE: Whenever you modify this file you should run the command # "testparm" to check that you have not made any basic syntactic # errors. # A well-established practice is to name the original file # "smb.conf.master" and create the "real" config file with # testparm -s smb.conf.master >smb.conf # This minimizes the size of the really used smb.conf file # which, according to the Samba Team, impacts performance # However, use this with caution if your smb.conf file contains nested # "include" statements. See Debian bug #483187 for a case # where using a master file is not a good idea. # #======================= Global Settings ======================= [global] log file = /var/log/samba/log.%m passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* . obey pam restrictions = yes map to guest = bad user encrypt passwords = true passwd program = /usr/bin/passwd %u passdb backend = tdbsam dns proxy = no writeable = yes server string = %h server (Samba, Ubuntu) unix password sync = yes workgroup = WORKGROUP syslog = 0 panic action = /usr/share/samba/panic-action %d usershare allow guests = yes max log size = 1000 pam password change = yes ## Browsing/Identification ### # Change this to the workgroup/NT-domain name your Samba server will part of # server string is the equivalent of the NT Description field # Windows Internet Name Serving Support Section: # WINS Support - Tells the NMBD component of Samba to enable its WINS Server # wins support = no # WINS Server - Tells the NMBD components of Samba to be a WINS Client # Note: Samba can be either a WINS Server, or a WINS Client, but NOT both ; wins server = w.x.y.z # This will prevent nmbd to search for NetBIOS names through DNS. # What naming service and in what order should we use to resolve host names # to IP addresses ; name resolve order = lmhosts host wins bcast #### Networking #### # The specific set of interfaces / networks to bind to # This can be either the interface name or an IP address/netmask; # interface names are normally preferred ; interfaces = 127.0.0.0/8 eth0 # Only bind to the named interfaces and/or networks; you must use the # 'interfaces' option above to use this. # It is recommended that you enable this feature if your Samba machine is # not protected by a firewall or is a firewall itself. However, this # option cannot handle dynamic or non-broadcast interfaces correctly. ; bind interfaces only = yes #### Debugging/Accounting #### # This tells Samba to use a separate log file for each machine # that connects # Cap the size of the individual log files (in KiB). # If you want Samba to only log through syslog then set the following # parameter to 'yes'. # syslog only = no # We want Samba to log a minimum amount of information to syslog. Everything # should go to /var/log/samba/log.{smbd,nmbd} instead. If you want to log # through syslog you should set the following parameter to something higher. # Do something sensible when Samba crashes: mail the admin a backtrace ####### Authentication ####### # "security = user" is always a good idea. This will require a Unix account # in this server for every user accessing the server. See # /usr/share/doc/samba-doc/htmldocs/Samba3-HOWTO/ServerType.html # in the samba-doc package for details. # security = user # You may wish to use password encryption. See the section on # 'encrypt passwords' in the smb.conf(5) manpage before enabling. # If you are using encrypted passwords, Samba will need to know what # password database type you are using. # This boolean parameter controls whether Samba attempts to sync the Unix # password with the SMB password when the encrypted SMB password in the # passdb is changed. # For Unix password sync to work on a Debian GNU/Linux system, the following # parameters must be set (thanks to Ian Kahan <<[email protected]> for # sending the correct chat script for the passwd program in Debian Sarge). # This boolean controls whether PAM will be used for password changes # when requested by an SMB client instead of the program listed in # 'passwd program'. The default is 'no'. # This option controls how unsuccessful authentication attempts are mapped # to anonymous connections ########## Domains ########### # Is this machine able to authenticate users. Both PDC and BDC # must have this setting enabled. If you are the BDC you must # change the 'domain master' setting to no # ; domain logons = yes # # The following setting only takes effect if 'domain logons' is set # It specifies the location of the user's profile directory # from the client point of view) # The following required a [profiles] share to be setup on the # samba server (see below) ; logon path = \\%N\profiles\%U # Another common choice is storing the profile in the user's home directory # (this is Samba's default) # logon path = \\%N\%U\profile # The following setting only takes effect if 'domain logons' is set # It specifies the location of a user's home directory (from the client # point of view) ; logon drive = H: # logon home = \\%N\%U # The following setting only takes effect if 'domain logons' is set # It specifies the script to run during logon. The script must be stored # in the [netlogon] share # NOTE: Must be store in 'DOS' file format convention ; logon script = logon.cmd # This allows Unix users to be created on the domain controller via the SAMR # RPC pipe. The example command creates a user account with a disabled Unix # password; please adapt to your needs ; add user script = /usr/sbin/adduser --quiet --disabled-password --gecos "" %u # This allows machine accounts to be created on the domain controller via the # SAMR RPC pipe. # The following assumes a "machines" group exists on the system ; add machine script = /usr/sbin/useradd -g machines -c "%u machine account" -d /var/lib/samba -s /bin/false %u # This allows Unix groups to be created on the domain controller via the SAMR # RPC pipe. ; add group script = /usr/sbin/addgroup --force-badname %g ########## Printing ########## # If you want to automatically load your printer list rather # than setting them up individually then you'll need this # load printers = yes # lpr(ng) printing. You may wish to override the location of the # printcap file ; printing = bsd ; printcap name = /etc/printcap # CUPS printing. See also the cupsaddsmb(8) manpage in the # cupsys-client package. ; printing = cups ; printcap name = cups ############ Misc ############ # Using the following line enables you to customise your configuration # on a per machine basis. The %m gets replaced with the netbios name # of the machine that is connecting ; include = /home/samba/etc/smb.conf.%m # Most people will find that this option gives better performance. # See smb.conf(5) and /usr/share/doc/samba-doc/htmldocs/Samba3-HOWTO/speed.html # for details # You may want to add the following on a Linux system: # SO_RCVBUF=8192 SO_SNDBUF=8192 # socket options = TCP_NODELAY # The following parameter is useful only if you have the linpopup package # installed. The samba maintainer and the linpopup maintainer are # working to ease installation and configuration of linpopup and samba. ; message command = /bin/sh -c '/usr/bin/linpopup "%f" "%m" %s; rm %s' & # Domain Master specifies Samba to be the Domain Master Browser. If this # machine will be configured as a BDC (a secondary logon server), you # must set this to 'no'; otherwise, the default behavior is recommended. # domain master = auto # Some defaults for winbind (make sure you're not using the ranges # for something else.) ; idmap uid = 10000-20000 ; idmap gid = 10000-20000 ; template shell = /bin/bash # The following was the default behaviour in sarge, # but samba upstream reverted the default because it might induce # performance issues in large organizations. # See Debian bug #368251 for some of the consequences of *not* # having this setting and smb.conf(5) for details. ; winbind enum groups = yes ; winbind enum users = yes # Setup usershare options to enable non-root users to share folders # with the net usershare command. # Maximum number of usershare. 0 (default) means that usershare is disabled. ; usershare max shares = 100 # Allow users who've been granted usershare privileges to create # public shares, not just authenticated ones #======================= Share Definitions ======================= # Un-comment the following (and tweak the other settings below to suit) # to enable the default home directory shares. This will share each # user's home director as \\server\username ;[homes] ; comment = Home Directories ; browseable = no # By default, the home directories are exported read-only. Change the # next parameter to 'no' if you want to be able to write to them. ; read only = yes # File creation mask is set to 0700 for security reasons. If you want to # create files with group=rw permissions, set next parameter to 0775. ; create mask = 0700 # Directory creation mask is set to 0700 for security reasons. If you want to # create dirs. with group=rw permissions, set next parameter to 0775. ; directory mask = 0700 # By default, \\server\username shares can be connected to by anyone # with access to the samba server. Un-comment the following parameter # to make sure that only "username" can connect to \\server\username # The following parameter makes sure that only "username" can connect # # This might need tweaking when using external authentication schemes ; valid users = %S # Un-comment the following and create the netlogon directory for Domain Logons # (you need to configure Samba to act as a domain controller too.) ;[netlogon] ; comment = Network Logon Service ; path = /home/samba/netlogon ; guest ok = yes ; read only = yes # Un-comment the following and create the profiles directory to store # users profiles (see the "logon path" option above) # (you need to configure Samba to act as a domain controller too.) # The path below should be writable by all users so that their # profile directory may be created the first time they log on ;[profiles] ; comment = Users profiles ; path = /home/samba/profiles ; guest ok = no ; browseable = no ; create mask = 0600 ; directory mask = 0700 [printers] comment = All Printers browseable = no path = /var/spool/samba printable = yes guest ok = no read only = yes create mask = 0700 # Windows clients look for this share name as a source of downloadable # printer drivers [print$] comment = Printer Drivers browseable = yes writeable = no path = /var/lib/samba/printers # Uncomment to allow remote administration of Windows print drivers. # You may need to replace 'lpadmin' with the name of the group your # admin users are members of. # Please note that you also need to set appropriate Unix permissions # to the drivers directory for these users to have write rights in it ; write list = root, @lpadmin # A sample share for sharing your CD-ROM with others. ;[cdrom] ; comment = Samba server's CD-ROM ; read only = yes ; locking = no ; path = /cdrom ; guest ok = yes # The next two parameters show how to auto-mount a CD-ROM when the # cdrom share is accesed. For this to work /etc/fstab must contain # an entry like this: # # /dev/scd0 /cdrom iso9660 defaults,noauto,ro,user 0 0 # # The CD-ROM gets unmounted automatically after the connection to the # # If you don't want to use auto-mounting/unmounting make sure the CD # is mounted on /cdrom # ; preexec = /bin/mount /cdrom ; postexec = /bin/umount /cdrom [mediafiles] path = /media/multimedia/

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  • Why are pieces of my HTML showing up on the page and breaking it? Is it PHP related?

    - by Jason Rhodes
    I've been building a site in PHP, HTML, CSS, and using a healthy dose of jQuery javascript. The site looks absolutely fine on my Mac browsers, but for some reason, when my client uses PC Safari, she's seeing strange bits of my HTML show up on the page. Here are some (small) screenshot examples: Figure 1: This one is just a closing </li> tag that should've been on the Media li element. Not much harm done, but strange. Figure 2: Here this was part of <div class='submenu'> and since the div tag didn't render properly, the entire contents of that div don't get styled correctly by CSS. Figure 3: This last example shows what should have been <a class='top current' href=... but for some reason half of the HTML tag stops being rendered and just gets printed out. So the rest of that list menu is completely broken. Here's the code from the header.php file itself. The main navigation section (seen in the screenshots) is further down, marked by a line of asterisks if you want to skip there. <?php // Setting up location variables if(isset($_GET['page'])) { $page = Page::find_by_slug($_GET['page']); } elseif(isset($_GET['post'])) { $page = Page::find_by_id(4); } else { $page = Page::find_by_id(1); } $post = isset($_GET['post']) ? Blogpost::find_by_slug($_GET['post']) : false; $front = $page->id == 1 ? true : false; $buildblog = $page->id == 4 ? true : false; $eventpage = $page->id == 42 ? true : false; // Setting up content edit variables $edit = isset($_GET['edit']) ? true : false; $preview = isset($_GET['preview']) ? true : false; // Finding page slug value $pageslug = $page->get_slug($loggedIn); ?> <!DOCTYPE html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title> <?php if(!$post) { if($page->id != 1) { echo $page->title." | "; } echo $database->site_name(); } elseif($post) { echo "BuildBlog | ".$post->title; } ?> </title> <link href="<?php echo SITE_URL; ?>/styles/style.css" media="all" rel="stylesheet" /> <?php include(SITE_ROOT."/scripts/myJS.php"); ?> </head> <body class=" <?php if($loggedIn) { echo "logged"; } else { echo "public"; } if($front) { echo " front"; } ?>"> <?php $previewslug = str_replace("&edit", "", $pageslug); ?> <?php if($edit) { echo "<form id='editPageForm' action='?page={$previewslug}&preview' method='post'>"; } ?> <?php if($edit && !$preview) : // Edit original ?> <div id="admin_meta_nav" class="admin_meta_nav"> <ul class="center nolist"> <li class="title">Edit</li> <li class="cancel"><a class="cancel" href="?page=<?php echo $pageslug; ?>&cancel">Cancel</a></li> <li class="save"><input style='position: relative; z-index: 500' class='save' type="submit" name="newpreview" value="Preview" /></li> <li class="publish"><input style='position: relative; z-index: 500' class='publish button' type="submit" name="publishPreview" value="Publish" /></li> </ul> </div> <?php elseif($preview && !$edit) : // Preview your edits ?> <div id="admin_meta_nav" class="admin_meta_nav"> <ul class="center nolist"> <li class="title">Preview</li> <li class="cancel"><a class="cancel" href="?page=<?php echo $pageslug; ?>&cancel">Cancel</a></li> <li class="save"><a class="newpreview" href="?page=<?php echo $pageslug; ?>&preview&edit">Continue Editing</a></li> <li class="publish"><a class="publish" href="?page=<?php echo $pageslug; ?>&publishLastPreview">Publish</a></li> </ul> </div> <?php elseif($preview && $edit) : // Return to preview and continue editing ?> <div id="admin_meta_nav" class="admin_meta_nav"> <ul class="center nolist"> <li class="title">Edit Again</li> <li class="cancel"><a class="cancel" href="?page=<?php echo $pageslug; ?>&cancel">Cancel</a></li> <li class="save"><input style='position: relative; z-index: 500' class='save button' type="submit" name="newpreview" value="Preview" /></li> <li class="publish"><input style='position: relative; z-index: 500' class='publish button' type="submit" name="publishPreview" value="Publish" /></li> </ul> </div> <?php else : ?> <div id="meta_nav" class="meta_nav"> <ul class="center nolist"> <li><a href="login.php?logout">Logout</a></li> <li><a href="<?php echo SITE_URL; ?>/admin">Admin</a></li> <li><a href="<?php if($front) { echo "admin/?admin=frontpage"; } elseif($event || $eventpage) { echo "admin/?admin=events"; } elseif($buildblog) { if($post) { echo "admin/editpost.php?post={$post->id}"; } else { echo "admin/?admin=blog"; } } else { echo "?page=".$pageslug."&edit"; } ?>">Edit Mode</a></li> <li><a href="<?php echo SITE_URL; ?>/?page=donate">Donate</a></li> <li><a href="<?php echo SITE_URL; ?>/?page=calendar">Calendar</a></li> </ul> <div class="clear"></div> </div> <?php endif; ?> <div id="public_meta_nav" class="public_meta_nav"> <div class="center"> <ul class="nolist"> <li><a href="<?php echo SITE_URL; ?>/?page=donate">Donate</a></li> <li><a href="<?php echo SITE_URL; ?>/?page=calendar">Calendar</a></li> </ul> <div class="clear"></div> </div> </div> * Main Navigation Section, as seen in screenshots above, starts here ** <div class="header"> <div class="center"> <a class="front_logo" href="<?php echo SITE_URL; ?>"><?php echo $database->site_name(); ?></a> <ul class="nolist main_nav"> <?php $tops = Page::get_top_pages(); $topcount = 1; foreach($tops as $top) { $current = $top->id == $topID ? true : false; $title = $top->title == "Front Page" ? "Home" : ucwords($top->title); $url = ($top->title == "Front Page" || !$top->get_slug($loggedIn)) ? SITE_URL : SITE_URL . "/?page=".$top->get_slug($loggedIn); if(isset($_GET['post']) && $top->id == 1) { $current = false; } if(isset($_GET['post']) && $top->id == 4) { $current = true; } echo "<li"; if($topcount > 3) { echo " class='right'"; } echo "><a class='top"; if($current) { echo " current"; } echo "' href='{$url}'>{$title}</a>"; if($children = Page::get_children($top->id)) { echo "<div class='submenu'>"; echo "<div class='corner-helper'></div>"; foreach($children as $child) { echo "<ul class='nolist level1"; if(!$subchildren = Page::get_children($child->id)) { echo " nochildren"; } echo "'>"; $title = ucwords($child->title); $url = !$child->get_slug($loggedIn) ? SITE_URL : SITE_URL . "/?page=".$child->get_slug($loggedIn); if($child->has_published() || $loggedIn) { echo "<li><a class='title' href='{$url}'>{$title}</a>"; if($subchildren = Page::get_children($child->id)) { echo "<ul class='nolist level2'>"; foreach($subchildren as $subchild) { if($subchild->has_published() || $loggedIn) { $title = ucwords($subchild->title); $url = !$subchild->get_slug($loggedIn) ? SITE_URL : SITE_URL . "/?page=".$subchild->get_slug($loggedIn); echo "<li><a href='{$url}'>{$title}</a>"; } } echo "</ul>"; } echo "</li>"; } echo "</ul>"; } echo "</div>"; } echo "</li>"; $topcount++; } ?> </ul> <div class="clear"></div> </div> </div> <div id="mediaLibraryPopup" class="mediaLibraryPopup"> <h3>Media Library</h3> <ul class="box nolist"></ul> <div class="clear"></div> <a href="#" class="cancel">Cancel</a> </div> <div class="main_content"> Does anyone have any idea why the PC Safari browser would be breaking things up like this? I'm assuming it's PHP related but I cannot figure out why it would do that.

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  • Enabling Kerberos Authentication for Reporting Services

    - by robcarrol
    Recently, I’ve helped several customers with Kerberos authentication problems with Reporting Services and Analysis Services, so I’ve decided to write this blog post and pull together some useful resources in one place (there are 2 whitepapers in particular that I found invaluable configuring Kerberos authentication, and these can be found in the references section at the bottom of this post). In most of these cases, the problem has manifested itself with the Login failed for User ‘NT Authority\Anonymous’ (“double-hop”) error. By default, Reporting Services uses Windows Integrated Authentication, which includes the Kerberos and NTLM protocols for network authentication. Additionally, Windows Integrated Authentication includes the negotiate security header, which prompts the client to select Kerberos or NTLM for authentication. The client can access reports which have the appropriate permissions by using Kerberos for authentication. Servers that use Kerberos authentication can impersonate those clients and use their security context to access network resources. You can configure Reporting Services to use both Kerberos and NTLM authentication; however this may lead to a failure to authenticate. With negotiate, if Kerberos cannot be used, the authentication method will default to NTLM. When negotiate is enabled, the Kerberos protocol is always used except when: Clients/servers that are involved in the authentication process cannot use Kerberos. The client does not provide the information necessary to use Kerberos. An in-depth discussion of Kerberos authentication is beyond the scope of this post, however when users execute reports that are configured to use Windows Integrated Authentication, their logon credentials are passed from the report server to the server hosting the data source. Delegation needs to be set on the report server and Service Principle Names (SPNs) set for the relevant services. When a user processes a report, the request must go through a Web server on its way to a database server for processing. Kerberos authentication enables the Web server to request a service ticket from the domain controller; impersonate the client when passing the request to the database server; and then restrict the request based on the user’s permissions. Each time a server is required to pass the request to another server, the same process must be used. Kerberos authentication is supported in both native and SharePoint integrated mode, but I’ll focus on native mode for the purpose of this post (I’ll explain configuring SharePoint integrated mode and Kerberos authentication in a future post). Configuring Kerberos avoids the authentication failures due to double-hop issues. These double-hop errors occur when a users windows domain credentials can’t be passed to another server to complete the user’s request. In the case of my customers, users were executing Reporting Services reports that were configured to query Analysis Services cubes on a separate machine using Windows Integrated security. The double-hop issue occurs as NTLM credentials are valid for only one network hop, subsequent hops result in anonymous authentication. The client attempts to connect to the report server by making a request from a browser (or some other application), and the connection process begins with authentication. With NTLM authentication, client credentials are presented to Computer 2. However Computer 2 can’t use the same credentials to access Computer 3 (so we get the Anonymous login error). To access Computer 3 it is necessary to configure the connection string with stored credentials, which is what a number of customers I have worked with have done to workaround the double-hop authentication error. However, to get the benefits of Windows Integrated security, a better solution is to enable Kerberos authentication. Again, the connection process begins with authentication. With Kerberos authentication, the client and the server must demonstrate to one another that they are genuine, at which point authentication is successful and a secure client/server session is established. In the illustration above, the tiers represent the following: Client tier (computer 1): The client computer from which an application makes a request. Middle tier (computer 2): The Web server or farm where the client’s request is directed. Both the SharePoint and Reporting Services server(s) comprise the middle tier (but we’re only concentrating on native deployments just now). Back end tier (computer 3): The Database/Analysis Services server/Cluster where the requested data is stored. In order to enable Kerberos authentication for Reporting Services it’s necessary to configure the relevant SPNs, configure trust for delegation for server accounts, configure Kerberos with full delegation and configure the authentication types for Reporting Services. Service Principle Names (SPNs) are unique identifiers for services and identify the account’s type of service. If an SPN is not configured for a service, a client account will be unable to authenticate to the servers using Kerberos. You need to be a domain administrator to add an SPN, which can be added using the SetSPN utility. For Reporting Services in native mode, the following SPNs need to be registered --SQL Server Service SETSPN -S mssqlsvc/servername:1433 Domain\SQL For named instances, or if the default instance is running under a different port, then the specific port number should be used. --Reporting Services Service SETSPN -S http/servername Domain\SSRS SETSPN -S http/servername.domain.com Domain\SSRS The SPN should be set for the NETBIOS name of the server and the FQDN. If you access the reports using a host header or DNS alias, then that should also be registered SETSPN -S http/www.reports.com Domain\SSRS --Analysis Services Service SETSPN -S msolapsvc.3/servername Domain\SSAS Next, you need to configure trust for delegation, which refers to enabling a computer to impersonate an authenticated user to services on another computer: Location Description Client 1. The requesting application must support the Kerberos authentication protocol. 2. The user account making the request must be configured on the domain controller. Confirm that the following option is not selected: Account is sensitive and cannot be delegated. Servers 1. The service accounts must be trusted for delegation on the domain controller. 2. The service accounts must have SPNs registered on the domain controller. If the service account is a domain user account, the domain administrator must register the SPNs. In Active Directory Users and Computers, verify that the domain user accounts used to access reports have been configured for delegation (the ‘Account is sensitive and cannot be delegated’ option should not be selected): We then need to configure the Reporting Services service account and computer to use Kerberos with full delegation:   We also need to do the same for the SQL Server or Analysis Services service accounts and computers (depending on what type of data source you are connecting to in your reports). Finally, and this is the part that sometimes gets over-looked, we need to configure the authentication type correctly for reporting services to use Kerberos authentication. This is configured in the Authentication section of the RSReportServer.config file on the report server. <Authentication> <AuthenticationTypes>           <RSWindowsNegotiate/> </AuthenticationTypes> <EnableAuthPersistence>true</EnableAuthPersistence> </Authentication> This will enable Kerberos authentication for Internet Explorer. For other browsers, see the link below. The report server instance must be restarted for these changes to take effect. Once these changes have been made, all that’s left to do is test to make sure Kerberos authentication is working properly by running a report from report manager that is configured to use Windows Integrated authentication (either connecting to Analysis Services or SQL Server back-end). Resources: Manage Kerberos Authentication Issues in a Reporting Services Environment http://download.microsoft.com/download/B/E/1/BE1AABB3-6ED8-4C3C-AF91-448AB733B1AF/SSRSKerberos.docx Configuring Kerberos Authentication for Microsoft SharePoint 2010 Products http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=23176 How to: Configure Windows Authentication in Reporting Services http://msdn.microsoft.com/en-us/library/cc281253.aspx RSReportServer Configuration File http://msdn.microsoft.com/en-us/library/ms157273.aspx#Authentication Planning for Browser Support http://msdn.microsoft.com/en-us/library/ms156511.aspx

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  • NHibernate: Collection was modified; enumeration operation may not execute

    - by Daoming Yang
    Hi All, I'm currently struggling with this "Collection was modified; enumeration operation may not execute" issue. I have searched about this error message, and it's all related to the foreach statement. I do have the some foreach statements, but they are just simply representing the data. I did not using any remove or add inside the foreach statement. NOTE: The error randomly happens (about 4-5 times a day). The application is the MVC website. There are about 5 users operate this applications (about 150 orders a day). Could it be some another users modified the collection, and then occur this error? I have log4net setup and the settings can be found here Make sure that the controller has a parameterless public constructor I do have parameterless public constructor in AdminProductController Does anyone know why this happen and how to resolve this issue? A friend (Oskar) mentioned that "Theory: Maybe the problem is that your configuration and session factory is initialized on the first request after application restart. If a second request comes in before the first request is finished, maybe it will also try to initialize and then triggering this problem somehow." Many thanks. Daoming Here is the error message: System.InvalidOperationException Collection was modified; enumeration operation may not execute. System.InvalidOperationException: An error occurred when trying to create a controller of type 'WebController.Controllers.Admin.AdminProductController'. Make sure that the controller has a parameterless public constructor. --- System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. --- NHibernate.MappingException: Could not configure datastore from input stream DomainModel.Entities.Mappings.OrderProductVariant.hbm.xml --- System.InvalidOperationException: Collection was modified; enumeration operation may not execute. at System.Collections.ArrayList.ArrayListEnumeratorSimple.MoveNext() at System.Xml.Schema.XmlSchemaSet.AddSchemaToSet(XmlSchema schema) at System.Xml.Schema.XmlSchemaSet.Add(String targetNamespace, XmlSchema schema) at System.Xml.Schema.XmlSchemaSet.Add(XmlSchema schema) at NHibernate.Cfg.Configuration.LoadMappingDocument(XmlReader hbmReader, String name) at NHibernate.Cfg.Configuration.AddInputStream(Stream xmlInputStream, String name) --- End of inner exception stack trace --- at NHibernate.Cfg.Configuration.LogAndThrow(Exception exception) at NHibernate.Cfg.Configuration.AddInputStream(Stream xmlInputStream, String name) at NHibernate.Cfg.Configuration.AddResource(String path, Assembly assembly) at NHibernate.Cfg.Configuration.AddAssembly(Assembly assembly) at DomainModel.RepositoryBase..ctor() at WebController.Controllers._baseController..ctor() at WebController.Controllers.Admin.AdminProductController..ctor() at System.RuntimeType.CreateInstanceImpl(Boolean publicOnly, Boolean skipVisibilityChecks, Boolean fillCache) --- End of inner exception stack trace --- at System.RuntimeType.CreateInstanceImpl(Boolean publicOnly, Boolean skipVisibilityChecks, Boolean fillCache) at System.Activator.CreateInstance(Type type, Boolean nonPublic) at System.Web.Mvc.DefaultControllerFactory.GetControllerInstance(RequestContext requestContext, Type controllerType) --- End of inner exception stack trace --- at System.Web.Mvc.DefaultControllerFactory.GetControllerInstance(RequestContext requestContext, Type controllerType) at System.Web.Mvc.DefaultControllerFactory.CreateController(RequestContext requestContext, String controllerName) at System.Web.Mvc.MvcHandler.ProcessRequestInit(HttpContextBase httpContext, IController& controller, IControllerFactory& factory) at System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContextBase httpContext, AsyncCallback callback, Object state) at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) UPDATE CODE: In my Global.asax.cs, I'm doing this: protected void Application_BeginRequest(object sender, EventArgs e) { ManagedWebSessionContext.Bind(HttpContext.Current, SessionManager.SessionFactory.OpenSession()); } protected void Application_EndRequest(object sender, EventArgs e) { ISession session = ManagedWebSessionContext.Unbind(HttpContext.Current, SessionManager.SessionFactory); if (session != null) { try { if (session.Transaction != null && session.Transaction.IsActive) { session.Transaction.Rollback(); } else { session.Flush(); } } finally { session.Close(); } } } In the SessionManager class, I'm doing: public class SessionManager { private readonly ISessionFactory sessionFactory; public static ISessionFactory SessionFactory { get { return Instance.sessionFactory; } } private ISessionFactory GetSessionFactory() { return sessionFactory; } public static SessionManager Instance { get { return NestedSessionManager.sessionManager; } } public static ISession OpenSession() { return Instance.GetSessionFactory().OpenSession(); } public static ISession CurrentSession { get { return Instance.GetSessionFactory().GetCurrentSession(); } } private SessionManager() { Configuration config = new Configuration().Configure(); config.AddAssembly(Assembly.GetExecutingAssembly()); sessionFactory = config.BuildSessionFactory(); } class NestedSessionManager { internal static readonly SessionManager sessionManager = new SessionManager(); } } In the Repository, I'm doing this: public IEnumerable<User> GetAll() { ICriteria criteria = SessionManager.CurrentSession.CreateCriteria(typeof(User)); return criteria.List<User>(); } In the Controller, I'm doing this: public class UserController : _baseController { IUserRoleRepository _userRoleRepository; internal static readonly ILogger log = LogManager.GetLogger(typeof(UserController)); public UserController() { _userRoleRepository = new UserRoleRepository(); } public ActionResult UserList() { var myList = _usersRepository.GetAll(); return View(myList); } }

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  • RSS feeds in Orchard

    - by Bertrand Le Roy
    When we added RSS to Orchard, we wanted to make it easy for any module to expose any contents as a feed. We also wanted the rendering of the feed to be handled by Orchard in order to minimize the amount of work from the module developer. A typical example of such feed exposition is of course blog feeds. We have an IFeedManager interface for which you can get the built-in implementation through dependency injection. Look at the BlogController constructor for an example: public BlogController( IOrchardServices services, IBlogService blogService, IBlogSlugConstraint blogSlugConstraint, IFeedManager feedManager, RouteCollection routeCollection) { If you look a little further in that same controller, in the Item action, you’ll see a call to the Register method of the feed manager: _feedManager.Register(blog); This in reality is a call into an extension method that is specialized for blogs, but we could have made the two calls to the actual generic Register directly in the action instead, that is just an implementation detail: feedManager.Register(blog.Name, "rss", new RouteValueDictionary { { "containerid", blog.Id } }); feedManager.Register(blog.Name + " - Comments", "rss", new RouteValueDictionary { { "commentedoncontainer", blog.Id } }); What those two effective calls are doing is to register two feeds: one for the blog itself and one for the comments on the blog. For each call, the name of the feed is provided, then we have the type of feed (“rss”) and some values to be injected into the generic RSS route that will be used later to route the feed to the right providers. This is all you have to do to expose a new feed. If you’re only interested in exposing feeds, you can stop right there. If on the other hand you want to know what happens after that under the hood, carry on. What happens after that is that the feedmanager will take care of formatting the link tag for the feed (see FeedManager.GetRegisteredLinks). The GetRegisteredLinks method itself will be called from a specialized filter, FeedFilter. FeedFilter is an MVC filter and the event we’re interested in hooking into is OnResultExecuting, which happens after the controller action has returned an ActionResult and just before MVC executes that action result. In other words, our feed registration has already been called but the view is not yet rendered. Here’s the code for OnResultExecuting: model.Zones.AddAction("head:after", html => html.ViewContext.Writer.Write( _feedManager.GetRegisteredLinks(html))); This is another piece of code whose execution is differed. It is saying that whenever comes time to render the “head” zone, this code should be called right after. The code itself is rendering the link tags. As a result of all that, here’s what can be found in an Orchard blog’s head section: <link rel="alternate" type="application/rss+xml"     title="Tales from the Evil Empire"     href="/rss?containerid=5" /> <link rel="alternate" type="application/rss+xml"     title="Tales from the Evil Empire - Comments"     href="/rss?commentedoncontainer=5" /> The generic action that these two feeds point to is Index on FeedController. That controller has three important dependencies: an IFeedBuilderProvider, an IFeedQueryProvider and an IFeedItemProvider. Different implementations of these interfaces can provide different formats of feeds, such as RSS and Atom. The Match method enables each of the competing providers to provide a priority for themselves based on arbitrary criteria that can be found on the FeedContext. This means that a provider can be selected based not only on the desired format, but also on the nature of the objects being exposed as a feed or on something even more arbitrary such as the destination device (you could imagine for example giving shorter text only excerpts of posts on mobile devices, and full HTML on desktop). The key here is extensibility and dynamic competition and collaboration from unknown and loosely coupled parts. You’ll find this pattern pretty much everywhere in the Orchard architecture. The RssFeedBuilder implementation of IFeedBuilderProvider is also a regular controller with a Process action that builds a RssResult, which is itself a thin ActionResult wrapper around an XDocument. Let’s get back to the FeedController’s Index action. After having called into each known feed builder to get its priority on the currently requested feed, it will select the one with the highest priority. The next thing it needs to do is to actually fetch the data for the feed. This again is a collaborative effort from a priori unknown providers, the implementations of IFeedQueryProvider. There are several implementations by default in Orchard, the choice of which is again done through a Match method. ContainerFeedQuery for example chimes in when a “containerid” parameter is found in the context (see URL in the link tag above): public FeedQueryMatch Match(FeedContext context) { var containerIdValue = context.ValueProvider.GetValue("containerid"); if (containerIdValue == null) return null; return new FeedQueryMatch { FeedQuery = this, Priority = -5 }; } The actual work is done in the Execute method, which finds the right container content item in the Orchard database and adds elements for each of them. In other words, the feed query provider knows how to retrieve the list of content items to add to the feed. The last step is to translate each of the content items into feed entries, which is done by implementations of IFeedItemBuilder. There is no Match method this time. Instead, all providers are called with the collection of items (or more accurately with the FeedContext, but this contains the list of items, which is what’s relevant in most cases). Each provider can then choose to pick those items that it knows how to treat and transform them into the format requested. This enables the construction of heterogeneous feeds that expose content items of various types into a single feed. That will be extremely important when you’ll want to expose a single feed for all your site. So here are feeds in Orchard in a nutshell. The main point here is that there is a fair number of components involved, with some complexity in implementation in order to allow for extreme flexibility, but the part that you use to expose a new feed is extremely simple and light: declare that you want your content exposed as a feed and you’re done. There are cases where you’ll have to dive in and provide new implementations for some or all of the interfaces involved, but that requirement will only arise as needed. For example, you might need to create a new feed item builder to include your custom content type but that effort will be extremely focused on the specialized task at hand. The rest of the system won’t need to change. So what do you think?

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