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  • Proper Data Structure for Commentable Comments

    - by Wesley
    Been struggling with this on an architectural level. I have an object which can be commented on, let's call it a Post. Every post has a unique ID. Now I want to comment on that Post, and I can use ID as a foreign key, and each PostComment has an ItemID field which correlates to the Post. Since each Post has a unique ID, it is very easy to assign "Top Level" comments. When I comment on a comment however, I feel like I now need a PostCommentComment, which attaches to the ID of the PostComment. Since ID's are assigned sequentially, I can no longer simply use ItemID to differentiate where in the tree the comment is assigned. I.E. both a Post and a Post Comment might have an ID of '5', so my foreign key relationship is invalid. This seems like it could go on infinitely, with PostCommentCommentComment's etc... What's the best way to solve this? Should I have a field in the comment called "IsPostComment" or something of the like to know which collection to attach the ID to? This strikes me as the best solution I've seen so far, but now I feel like I need to make recursive DataBase calls which start to get expensive. Meaning, I get a Post and get all PostComments where ItemID == Post.ID && where IsPostComment == true Then I take that as a collection, gather all the ID's of the PostComments, and do another search where ItemID == PostComment[all].ID && where IsPostComment == false, then repeat infinitely. This means I make a call for every layer, and if I'm calling 100 Posts, I might make 1000 DB calls to get 10 layers of comments each. What is the right way to do this?

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  • Not use CSS definitions for one <FORM>

    - by Svisstack
    I have template from themeforest and i dont want edit css from this template, because i don't have time for it. But i want integrate paypal buttons to my webpage, problem is paypal button use tag for selection payment option. I have overloaded style for tag and this not look like should. How to not use CSS for this element. I dont want use and if i don't must then i dont want edit this CSS;-) This css look wired, i must edit her to solve this problem? What is best solution for this? /*//// - Forms - ////*/ form { margin-bottom:20px; } body.ie7 form, body.ie8 { margin-bottom:40px; } form p { margin-bottom:15px; } form label { float:left; width:140px; margin-top:5px; } form input, form textarea, form select { padding:10px 5px; background:#fff url(../img/bg-input.gif) repeat-x top; border:1px solid #D9D9D9; width:448px; border-radius:3px; -moz-border-radius:3px; -webkit-border-radius:3px; } form input.small { width:35px; } html, body, div, span, object, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, pre, abbr, address, cite, code, del, dfn, em, img, ins, kbd, q, samp, small, strong, sub, sup, var, b, i, dl, dt, dd, ol, ul, li, fieldset, form, label, legend, table, caption, tbody, tfoot, thead, tr, th, td, article, aside, figure, footer, header, hgroup, menu, nav, section, menu, time, mark, audio, video { margin:0; padding:0; border:0; outline:0; font-size:100%; vertical-align:baseline; background:transparent; } Can anyone help me?

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  • How to share internet over VPN and inside a virtual machine (Windows)?

    - by mountrix
    ` My final goal is to have a virtual machine at work in which anything that happen inside (tcp, udp, ping, ...) will use the Internet connection of a computer at home. So, if inside this VM should I open an Internet browser to a site such as "show my IP", my home IP should be printed. I am also looking for a way to debug/develop a software inside this VM, but I would like to tunnel only the connections of this software, not the full graphical interface, this is why a Remote Desktop solution won't fit me. The connection between the both computer should be secured somehow, like in a SSH tunnel. This ultimately should allow me to have a portable VM in which I can connect to whatever networks I have access at home, in a secure way. This is my configuration: At work, I have a LAN-connected desktop computer, with Windows 7 Professional Edition as a host [computer W] On this same computer, I have a Virtual Box machine running Windows XP [computer V] At home, I have a laptop computer, running Windows 7 Home Edition [computer H] This laptop is connected to a Livebox 2 broadband modem by Wifi. What I am trying to do is to sit at work in front of the virtual machine [V], and connect to a webpage as if the request was issued from the laptop [H] at home, and the data should be securely tunneled between the both. But if I am using internet directly inside [W], it should use the normal LAN interface at work. To achieve my goal, I first try using VPN, than SSH tunneling, without success. I first tried to install Teamviewer between [W] and [H]. This is working fine, I can send files, share desktop, etc. Teamviewer has a VPN mode that creates a new VPN network interface with its own IP, both on computer [W] and [H]. This allowed me to connect [H] as a network computer inside [W] and I was able to share files, but not to share Internet. At this point, I tried to use from [W] the Internet as if I was at home. I setup a route (using route add from command line in [W]) in order to instruct each packet going to a given website to pass by the new VPN interface on [W], with the hope it will be forwarded to [H], but the webpage was simply inaccessible. I then tried to setup a Windows VPN connection between [W] and [H], using the Windows 7 VPN feature. [H] was the server and [W] the client. But it failed: I got the "Unable to join a remote PC while trying to VPN" 720 Error when I was setting up the client on [W]. I think the problem is the Livebox 2 that could blocks the packets. But I am not sure of this: 1) with Teamviewer it works fine, 2) Livebox 2 has a configuration page for port mapping that gives the proper configuration to map VPN ports as an example so I guess that it should allow it, 3) I opened the ports 1723 (TCP) and 500 (UDP) according to some forums. Virtual box has a network configuration parameter in which I can use the VPN network interface created by Teamviewer as a bridged connection. This is suppose to work in the sense that all packets issued by the virtual machine [V] is supposed to go directly to [H]. But I had no internet connection inside [V]. Using the NAT mode, [V] has internet. For me this is the feature that I look for: filtering all connections from the virtual box application to the VPN network interface, and the remaining should use the normal LAN interface. Apart from the build-in feature of VBox, I even do not know if it is possible to route the packet from a given application to a given interface. Finally I tried also SSH tunneling, but this is not the solution I looked for. Using an external SSH server (Linux), I was able to create a localhost connection on [W] (or [V]), using something like 'ssh -N -D server[H]' in order to allow a web browser located in [W] to connect to any website using the SOCKS 5 proxy created locally (SOCKS is a build-in feature of SSH). But repeating the same operation on windows, using a windows SSH server inside [W] (I tried freeSSHd), it failed: SFTP worked, but not the SOCKS tunneling, it was like the browser in [H] did not find internet. Finally only Teamviewer looked able to create a VPN between [W] and [H], but I am not able to use it, as I want, I mean using the Internet connection of [H] sitting in front of [W]. I also tried to bridge the VPN interface and the wifi interface inside [H], but it blocked my laptop, and I tried also the Internet Connection Sharing, trying to share on [H] the wifi connection over the VPN interface. This fails also, but it seems because Teamviewer actually use the wifi interface to be able to provide the VPN link, so I guess I am creating a recursive loop. I do not know what to try next... Thank you for any advice!!

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  • Unable to access ubuntu through windows boot manager

    - by Arvind
    I am having an ASUS K55VM....it came with DOS....to this Windows 7 was installed...now i am planned to add another OS ie Ubuntu...my computer had 4 partitions of 240GB 230GB 230GB and 230GB....i changed this to 5 parts....243GB 230GB 230GB 150GB and an 80GB...i installed Ubuntu 12.04 to the 80GB partition through a USB flash drive....it installed fine...however the problem is during the Boot option in Windows Boot manager when i choose Ubuntu...this what is displayed... Windows failed to start. A recent hardware or software change might be the cause. To fix the problem: 1.Insert your Windows installation disc and restart your computer. 2.Choose your language settings, and then click "Next." 3.Click "Repair your computer." If you do not have this disc, contact your system administrator or computer manufacturer for assistance. File: \ubuntu\winboot\wubildr.mbr Status: 0xc000000e Info: The selected entry could not be loaded because the application is missing or corrupt. I tried to change the boot option for the OS and made Ubuntu as my first option....It worked...however windows 7 does not show up in GRUB....in this fear i did the following: Restarted my pc changed boot option 1 to windows. Formatted the drive to which Ubuntu was installed(80GB one)through windows. Restarted again. The problem persists....Windows boot manager shows Ubuntu still and when i choose this it gives two lines one like: grub rescue....but my windows 7 is working perfectly fine. Now want a solution to remove Ubuntu from the windows boot option and reinstall completely...

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  • Is the Realtek network driver on Windows Update fixed yet?

    - by Ian Boyd
    Months ago i was experiencing problems with my networking, and was hoping the updated Realtek RTL8168C(P)/8111C(P) Family PCI-E Gigabit Ethernet NIC (NDIS 6.20) driver available from Microsoft on Windows Update would fix the problems. Instead, after the reboot, the network device failed to start, and the driver had to be rolled back. I'm not the only person to get this problem, it even was dealt with by a superuser. A co-worker experienced the exact same problem, and we independently came up with the same solution: hide the updated driver in Windows Update. So I've continued to have my network troubles, and i still need an updated driver. Is the version of the Realtek driver on Windows Update fixed yet? i know Microsoft never pulled it down, but maybe it's been up-updated. i really don't want to find out by downloading it. Can someone else confirm that it's no longer broken - or can someone else be my guinea pig?

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  • SBS 2003 crashes often due to limited memory

    - by Sanoj
    I have a Windows SBS 2003 Std that regularly crashes, in about every 20th day. The only thing I can see in the logs is that used memory increases with about 30MB/day. The process that uses more and more memory is sqlservr. We don't have much installed on the server; a Point-Of-Sale-system that uses Pervasive SQL as database and an Accounting application. We just have 2GB of RAM and I could upgrade to 4GB but I think that this just delay the problem. Is there any solution to this problem? Could I limit sqlservr to some memory?

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  • How do I enable the globalmenu / appmenu on XFCE?

    - by Johann Philipp Strathausen
    I have tried various tricks I could find to install the global menu on xfce and lxde on the latest oneiric, but nothing worked. Does anyone have an idea on how to do that? Thanks. Here's what I've tried so far: the gnome global menu panel plugin (for lucid) via the xfapplet plugin (not in the official repos anymore) that can embedd gnome plugins into the xfce panel - unfortunately, the globalmenu doesn't show up in the xfapplet list of available gnome plugins (there's only one item in it) all instructions from an older question about globalmenu and its duplicate compiling manually the latest version from gnome2-globalmenu there is another question along with a solution for XFCE 4.8, but it's not working on Oneiric. It is also proposing to install the global menu applet from gnome using it via xfapplet. I've even found an XFCE-plugin for the global menu, but it keeps crashing when I add it to the panel - also I could not install all the packages due to some unmet dependencies I've added some code to ~/.config/xfce4/xinitrc as described in 10. of the FAQ of gnome2-globalmenu though I'm not sure what effect this should have.

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  • Backing up Hyper-V VMs using "wbadmin" failing on Windows Server 2012

    - by Ederson
    I'm trying to backup a single VM using "wbdamin". I'm using this command-line: wbadmin start backup -backupTarget:d: -hyperv:VM_Machine_Name -quiet But the backup have no success. Looking at my Events, I get the following information: Source: SSP Event ID: 16387 Level: Error "Writer Microsoft Hyper-V VSS Writer experienced some error during snapshot creation. More info: ." ============================= Source: Backup Event ID: 521 Level: Error "The backup operation that started at '?2014?-?06?-?11T15:38:44.459000000Z' has failed because the Volume Shadow Copy Service operation to create a shadow copy of the volumes being backed up failed with following error code '0x8100010C'. Please review the event details for a solution, and then rerun the backup operation once the issue is resolved." ============================= Source: VSS No Event Errors. I didn't find any info about "0x8100010C" error code through the web and I'm stuck. Anyone know how to fix this?

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  • windows firewall and network location switch after establishing a vpn connection

    - by Konrads
    Hello, I am looking for a reasonable solution for network location switching after VPN connection is established for Windows 7. The scenario is as follows: For location public (employee plugging in his laptop in hotel, public wi-fi,etc) all inbound connections are restricted, only outbound VPN + www is enabled. Employee then initiates a VPN connection, VPN pushes routes to 10.0.0.0/8 subnet Now I would like to have lax security rules for traffic from/to 10.0.0.0/8 that comes through the VPN interface, while still protecting the laptop from traffic that comes via uplink interface as if it was private. How to achieve this switching and duality? One option I see is switching to IPSec...

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  • Is It Time To Specialize?

    - by Tim Murphy
    Originally posted on: http://geekswithblogs.net/tmurphy/archive/2013/06/18/is-it-time-to-specialize.aspx Over my career I have made a living as a generalist.  I have been a jack of all trades and a master of none.  It has served me well in that I am able to move from one technology to the other quickly and make myself productive.  Where it becomes a problem is deep knowledge.  I am constantly digging for the things that aren’t basic knowledge.  How do you make a product like WCF or Windows RT do more than just “Hello World”? As an architect I need to be a jack of all trades.  This is what helps me to bring the big picture of a project into focus for developers with different skills to accomplish the goals of the project. It is a key when the mix technologies crosses Windows, Unix and Mainframe with different languages and databases.  The larger the company that the project is for the more likely this scenario will arise. As a consultant and a developer I need to have specialized skills in order to get the job done efficiently.  if I have a SharePoint or Windows Phone project knowing the object model details and possible roadblocks of the technology allow me to stay within budgets as well as better advise the client on technology decisions. What is the solution?  Constant learning and associating with developers who specialize in a variety of technologies is the best thing you can do.  You may have thought you were done with classes when you left college, but in this industry you need to constantly be learning new products and languages.  The ultimate answer is you must generally specialize.  Learn as many subject areas as possible, but go deep when ever you can.  Sleep is overrated.  Good luck. del.icio.us Tags: software development,software architecture,specialization,generalist

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  • What GUI tools are available for which DVCS?

    - by Macneil
    When I worked at Sun, we used a DVC system called Forte SCCS/Teamware, which used the old SCCS file format, but was a true distributed source code revision control system. One nice feature is that it had strong GUI support: You could bringover and putback changes by simply clicking and dragging. It would draw trees/graphs showing how workspaces relate to each other. You also could have a graph view to display a single file's complete history, which might have had several branches and merges. Allowing you to compare any two points. It also had a strong visual merge tool, to let you accept changes from one of two conflicting files. Naturally, many of the current DVCSs have command line support for these operations, but I'm looking for GUI support in order to use this in a lower-level undergraduate course I'll be teaching. I'm not saying the Forte Teamware solution was perfect, but it did seem to be ahead of the curve. Unfortunately, it's not a viable option to use for my class. Question: What support do the current DVCSs have with regards to GUIs? Do any of them work on Windows, and not just Linux? Are they "ready for prime-time" or still works in progress? Are these standalone or built as plug-ins, e.g., for Eclipse? Note: To help keep this discussion focused I'm only interested in GUI tools. And not a meta-discussion if GUI tools should be used in teaching.

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  • Lots of great stuff going on with Oracle Secure Global Desktop!

    - by Chris Kawalek
    You're probably familiar with Oracle Secure Global Desktop, our solution for providing secure, browser-based access to Oracle Applications and other enterprise software. It's a fantastic product and one I've been personally involved with for nearly a decade! I wanted to give you a quick update on all the fantastic things that are going on with it: First, we have done a few videos with Oracle's Mohan Prabhala at trade shows recently. You can get a quick product refresher and an update on the latest new features by watching these: Next, we talked at length with Brian Madden and Gabe Knuth on Brian and Gabe LIVE about Oracle Secure Global Desktop. Click here or on the screenshot below to go to the brianmadden.com video. Part 1 focuses on Oracle Secure Global Desktop. Listen toward the end for Brian to say, “I kinda want this actually at TechTarget right now.” The analysts are talking about us, too. When we released Oracle Secure Global Desktop 4.7, Chris Wolf over at Gartner had this to say on Twitter. Last, just a quick reminder for existing Oracle Applications customers that Oracle Secure Global Desktop is easy for you to leverage for secure application access. Oracle Secure Global desktop is certified for use with Oracle browser-based applications such as Primavera, E-Business Suite and with Exalogic. Steven Chan over at the E-Business Suite Technology blog gives a great explanation of how Oracle Secure Global Desktop works with E-Business Suite, as an example. As the title says, lots of great stuff going on! -Chris

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  • How can I use the shell to make my mp3s a Shoutcast source?

    - by ChasonDehsotel
    I'm looking to stream a directory of mp3s from my audio source (Debian server) to my Shoutcast server. The idea is to have an archive playing in the instance that someone isn't broadcasting live. I'm not sure how to continue. I started with extensive Google-ing, and was unable to come up with a solution. Evan Carroll suggested I try here. I appreciate any insight y'all may have. __ On a side note, "users with less than 100 reputation can't create new tags. The tags 'shoutcast-source shoutcast broadcasting' are new. Try using existing tags instead." -- Who can create these?

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  • Configuring a Jetty web application on a different port

    - by sHz
    Hi folks, I'm brand new to Jetty. I'd like to ask if its possible to have Jetty listening on port 8080, however where specified, serve a specific web application under say /var/jetty/webapps/<appname> (default on CentOS) served on say port 10000 instead of http://localhost:8080/<appname> i.e. http://localhost:10000/ = http://localhost:8080/<appname&gt; ? If so, what configuration changes would be required to make this work without an additional proxy server? I've googled away, but haven't found a solution (perhaps I've missed something obvious?).

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  • Case Study: Polystar Improves Telecom Networks Performance with Embedded MySQL

    - by Bertrand Matthelié
    Polystar delivers and supports systems that increase the quality, revenue and customer satisfaction of telecommunication services. Headquarted in Sweden, Polystar helps operators worldwide including Telia, Tele2, Telekom Malysia and T-Mobile to monitor their network performance and improve service levels. Challenges Deliver complete turnkey solutions to customers integrating a database ensuring high performance at scale, while being very easy to use, manage and optimize. Enable the implementation of distributed architectures including one database per server while maintaining a low Total Cost of Ownership (TCO). Avoid growing database complexity as the volume of mobile data to monitor and analyze drastically increases. Solution Evaluation of several databases and selection of MySQL based on its high performance, manageability, and low TCO. The MySQL databases implemented within the Polystar solutions handle on average 3,000 to 5,000 transactions per second. Up to 50 million records are inserted every day in each database. Typical installations include between 50 and 100 MySQL databases, up to 300 for the largest ones. Data is then periodically aggregated, with the original records being overwritten, as the need for detailed information becomes unnecessary to operators after a few weeks. The exponential growth in mobile data traffic driven by the proliferation of smartphones and usage of social media requires ever more powerful solutions to monitor, analyze and turn network data into actionable business intelligence. With MySQL, Polystar can deliver powerful, yet easy to manage, solutions to its customers. MySQL-based Polystar solutions enable operators to monitor, manage and improve the service levels of their telecom networks in over a dozen countries from a single location. The new and innovative MySQL features constantly delivered by Oracle help ensure Polystar that it will be able to meet its customer’s needs as they evolve. “MySQL has been a great embedded database choice for us. It delivers the high performance we need while remaining very easy to use, manage and tune. Power and simplicity at its best.” Mats Söderlindh, COO at Polystar.

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  • Using Lighttpd: apache proxy or direct connection?

    - by Halfgaar
    Hi, I'm optimizing a site by using lighttpd for the static media. I've found that a recommended solution is to use Apache Proxy to point to the lighttpd server. But, does that use up an Apache thread/process per request? In my setup, I've noticed that all my processes are used up, even though they aren't doing anything, CPU wise. To free up apache processes, I've configured lighttpd and the amount of processes needed is lowered significantly, Munin shows. However, I've set it up to connect directly to lighty, to prevent apache workers from being occupied by serving static media. My question is: when using Apache Proxy, does that also use up a process/worker per request?

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  • Can you have more than one ~/.ssh/config file?

    - by DrewVS
    We have a bastion server that we use to connect to multiple hosts, and our .ssh/config has grown to over a thousand lines (we have hundreds of hosts that we connect to). This is beginning to get a little unwieldy and I'd like to know if there is a way to break the .ssh/config file up into multiple files. Ideally, we'd specify somewhere that other files would be treated as an .ssh/config file, possibly like: ~/.ssh/config ~/.ssh/config_1 ~/.ssh/config_2 ~/.ssh/config_3 ... I have read the documentation on ssh/config, and I don't see that this is possible. But maybe someone else has had a similar issue and has found a solution.

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  • Persisting right click menu highlight

    - by Charlie Somerville
    I used to have this problem sometimes in Vista, but now I'm using Windows 7 (it was a clean install, reformatted hard drive) I'm disappointed that it's happening again. Basically what happens is sometimes when I right click on something and click an entry in the context menu, the highlight from entry remains on the screen, in front of everything else. I can get rid of it by changing my theme to Aero Basic and back again, but it's not a nice solution as it takes too long and often once I get rid of it, it comes back. Here you can see an example of what's happening - the highlight is there from Chrome's context menu. Does anyone know how to fix this?

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  • How do I connect to my running VM via virsh?

    - by Avery Chan
    My VM has already been started via virsh start chameleon.ootbdev. When I do a virsh console chameleon.ootbdev I get the following output: Connected to domain chameleon.ootbdev Escape character is ^] error: internal error cannot find character device (null) Doing a google search on this led me to this "solution". Unfortunately, editing the domain via virsh edit chameleon.ootbdev doesn't seem to stick. I suspect the issue is that I'm inserting the XML incorrectly: the instructions from the link ask me to insert the following XML into the domain XML file. <serial type='pty'> <target port='0'/> </serial> <console type='pty'> <target type='serial' port='0'/> </console> I've posted my domain XML file to pastebin here. This is AFTER I've tried to insert the above XML. I inserted this XML after the </devices> block. My primary question is: How do I connect to the running VM? A secondary question would be: How do I edit the domain file with the above XML and get the changes to stick?

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  • Solaris: What comes next?

    - by alanc
    As you probably know by now, a few months ago, we released Solaris 11 after years of development. That of course means we now need to figure out what comes next - if Solaris 11 is “The First Cloud OS”, then what do we need to make future releases of Solaris be, to be modern and competitive when they're released? So we've been having planning and brainstorming meetings, and I've captured some notes here from just one of those we held a couple weeks ago with a number of the Silicon Valley based engineers. Now before someone sees an idea here and calls their product rep wanting to know what's up, please be warned what follows are rough ideas, and as I'll discuss later, none of them have any committment, schedule, working code, or even plan for integration in any possible future product at this time. (Please don't make me force you to read the full Oracle future product disclaimer here, you should know it by heart already from the front of every Oracle product slide deck.) To start with, we did some background research, looking at ideas from other Oracle groups, and competitive OS'es. We examined what was hot in the technology arena and where the interesting startups were heading. We then looked at Solaris to see where we could apply those ideas. Making Network Admins into Socially Networking Admins We all know an admin who has grumbled about being the only one stuck late at work to fix a problem on the server, or having to work the weekend alone to do scheduled maintenance. But admins are humans (at least most are), and crave companionship and community with their fellow humans. And even when they're alone in the server room, they're never far from a network connection, allowing access to the wide world of wonders on the Internet. Our solution here is not building a new social network - there's enough of those already, and Oracle even has its own Oracle Mix social network already. What we proposed is integrating Solaris features to help engage our system admins with these social networks, building community and bringing them recognition in the workplace, using achievement recognition systems as found in many popular gaming platforms. For instance, if you had a Facebook account, and a group of admin friends there, you could register it with our Social Network Utility For Facebook, and then your friends might see: Alan earned the achievement Critically Patched (April 2012) for patching all his servers. Matt is only at 50% - encourage him to complete this achievement today! To avoid any undue risk of advertising who has unpatched servers that are easier targets for hackers to break into, this information would be tightly protected via Facebook's world-renowned privacy settings to avoid it falling into the wrong hands. A related form of gamification we considered was replacing simple certfications with role-playing-game-style Experience Levels. Instead of just knowing an admin passed a test establishing a given level of competency, these would provide recruiters with a more detailed level of how much real-world experience an admin has. Achievements such as the one above would feed into it, but larger numbers of experience points would be gained by tougher or more critical tasks - such as recovering a down system, or migrating a service to a new platform. (As long as it was an Oracle platform of course - migrating to an HP or IBM platform would cause the admin to lose points with us.) Unfortunately, we couldn't figure out a good way to prevent (if you will) “gaming” the system. For instance, a disgruntled admin might decide to start ignoring warnings from FMA that a part is beginning to fail or skip preventative maintenance, in the hopes that they'd cause a catastrophic failure to earn more points for bolstering their resume as they look for a job elsewhere, and not worrying about the effect on your business of a mission critical server going down. More Z's for ZFS Our suggested new feature for ZFS was inspired by the worlds most successful Z-startup of all time: Zynga. Using the Social Network Utility For Facebook described above, we'd tie it in with ZFS monitoring to help you out when you find yourself in a jam needing more disk space than you have, and can't wait a month to get a purchase order through channels to buy more. Instead with the click of a button you could post to your group: Alan can't find any space in his server farm! Can you help? Friends could loan you some space on their connected servers for a few weeks, knowing that you'd return the favor when needed. ZFS would create a new filesystem for your use on their system, and securely share it with your system using Kerberized NFS. If none of your friends have space, then you could buy temporary use space in small increments at affordable rates right there in Facebook, using your Facebook credits, and then file an expense report later, after the urgent need has passed. Universal Single Sign On One thing all the engineers agreed on was that we still had far too many "Single" sign ons to deal with in our daily work. On the web, every web site used to have its own password database, forcing us to hope we could remember what login name was still available on each site when we signed up, and which unique password we came up with to avoid having to disclose our other passwords to a new site. In recent years, the web services world has finally been reducing the number of logins we have to manage, with many services allowing you to login using your identity from Google, Twitter or Facebook. So we proposed following their lead, introducing PAM modules for web services - no more would you have to type in whatever login name IT assigned and try to remember the password you chose the last time password aging forced you to change it - you'd simply choose which web service you wanted to authenticate against, and would login to your Solaris account upon reciept of a cookie from their identity service. Pinning notes to the cloud We also all noted that we all have our own pile of notes we keep in our daily work - in text files in our home directory, in notebooks we carry around, on white boards in offices and common areas, on sticky notes on our monitors, or on scraps of paper pinned to our bulletin boards. The contents of the notes vary, some are things just for us, some are useful for our groups, some we would share with the world. For instance, when our group moved to a new building a couple years ago, we had a white board in the hallway listing all the NIS & DNS servers, subnets, and other network configuration information we needed to set up our Solaris machines after the move. Similarly, as Solaris 11 was finishing and we were all learning the new network configuration commands, we shared notes in wikis and e-mails with our fellow engineers. Users may also remember one of the popular features of Sun's old BigAdmin site was a section for sharing scripts and tips such as these. Meanwhile, the online "pin board" at Pinterest is taking the web by storm. So we thought, why not mash those up to solve this problem? We proposed a new BigAddPin site where users could “pin” notes, command snippets, configuration information, and so on. For instance, once they had worked out the ideal Automated Installation manifest for their app server, they could pin it up to share with the rest of their group, or choose to make it public as an example for the world. Localized data, such as our group's notes on the servers for our subnet, could be shared only to users connecting from that subnet. And notes that they didn't want others to see at all could be marked private, such as the list of phone numbers to call for late night pizza delivery to the machine room, the birthdays and anniversaries they can never remember but would be sleeping on the couch if they forgot, or the list of automatically generated completely random, impossible to remember root passwords to all their servers. For greater integration with Solaris, we'd put support right into the command shells — redirect output to a pinned note, set your path to include pinned notes as scripts you can run, or bring up your recent shell history and pin a set of commands to save for the next time you need to remember how to do that operation. Location service for Solaris servers A longer term plan would involve convincing the hardware design groups to put GPS locators with wireless transmitters in future server designs. This would help both admins and service personnel trying to find servers in todays massive data centers, and could feed into location presence apps to help show potential customers that while they may not see many Solaris machines on the desktop any more, they are all around. For instance, while walking down Wall Street it might show “There are over 2000 Solaris computers in this block.” [Note: this proposal was made before the recent media coverage of a location service aggregrator app with less noble intentions, and in hindsight, we failed to consider what happens when such data similarly falls into the wrong hands. We certainly wouldn't want our app to be misinterpreted as “There are over $20 million dollars of SPARC servers in this building, waiting for you to steal them.” so it's probably best it was rejected.] Harnessing the power of the GPU for Security Most modern OS'es make use of the widespread availability of high powered GPU hardware in today's computers, with desktop environments requiring 3-D graphics acceleration, whether in Ubuntu Unity, GNOME Shell on Fedora, or Aero Glass on Windows, but we haven't yet made Solaris fully take advantage of this, beyond our basic offering of Compiz on the desktop. Meanwhile, more businesses are interested in increasing security by using biometric authentication, but must also comply with laws in many countries preventing discrimination against employees with physical limations such as missing eyes or fingers, not to mention the lost productivity when employees can't login due to tinted contacts throwing off a retina scan or a paper cut changing their fingerprint appearance until it heals. Fortunately, the two groups considering these problems put their heads together and found a common solution, using 3D technology to enable authentication using the one body part all users are guaranteed to have - pam_phrenology.so, a new PAM module that uses an array USB attached web cams (or just one if the user is willing to spin their chair during login) to take pictures of the users head from all angles, create a 3D model and compare it to the one in the authentication database. While Mythbusters has shown how easy it can be to fool common fingerprint scanners, we have not yet seen any evidence that people can impersonate the shape of another user's cranium, no matter how long they spend beating their head against the wall to reshape it. This could possibly be extended to group users, using modern versions of some of the older phrenological studies, such as giving all users with long grey beards access to the System Architect role, or automatically placing users with pointy spikes in their hair into an easy use mode. Unfortunately, there are still some unsolved technical challenges we haven't figured out how to overcome. Currently, a visit to the hair salon causes your existing authentication to expire, and some users have found that shaving their heads is the only way to avoid bad hair days becoming bad login days. Reaction to these ideas After gathering all our notes on these ideas from the engineering brainstorming meeting, we took them in to present to our management. Unfortunately, most of their reaction cannot be printed here, and they chose not to accept any of these ideas as they were, but they did have some feedback for us to consider as they sent us back to the drawing board. They strongly suggested our ideas would be better presented if we weren't trying to decipher ink blotches that had been smeared by the condensation when we put our pint glasses on the napkins we were taking notes on, and to that end let us know they would not be approving any more engineering offsites in Irish themed pubs on the Friday of a Saint Patrick's Day weekend. (Hopefully they mean that situation specifically and aren't going to deny the funding for travel to this year's X.Org Developer's Conference just because it happens to be in Bavaria and ending on the Friday of the weekend Oktoberfest starts.) They recommended our research techniques could be improved over just sitting around reading blogs and checking our Facebook, Twitter, and Pinterest accounts, such as considering input from alternate viewpoints on topics such as gamification. They also mentioned that Oracle hadn't fully adopted some of Sun's common practices and we might have to try harder to get those to be accepted now that we are one unified company. So as I said at the beginning, don't pester your sales rep just yet for any of these, since they didn't get approved, but if you have better ideas, pass them on and maybe they'll get into our next batch of planning.

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  • NTFS Permissions-Special Permissions not working

    - by Srinivas
    I am using Windows 2008 R2 Server having a CENTRAL SHARED FOLDER (CENTRALSTORAGE). We are trying to give Domain Users in the Network access as like User1-\CentralStorage\IT\User1 and User2-\CentralStorage\IT\User2. But it is not working when i try to login to that user in Windows XP system which is already a registered computer of domain. Will someone help me in guiding how to declare permissions like \CentralStorage\IT - this is a Main Directory and should be accessed to VIEW folder sub-directories but not to DELETE/RENAME this folder. \CentralStorage\IT\User1 - Full Control to the User1 to ADD SUB-FOLDERS AND FILES. But not to delete/rename this folder name. I gave access using Special Permissions but it is showing as Access Denied when i logon and try to access. Kindly provide me a solution for the same.

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  • VirtualBox 3.2 Release

    - by [email protected]
    The latest version of VirtualBox is out - version 3.2.  It is the first release as Oracle VirtualBox and there are a lot of new features.  Many of these I see directly impacting the Oracle VDI solution in upcoming releases (just my guess, of course), and I am updating my notebook as I write this. Er... OK - Done!There are enough features that they warrant you taking a look at this two-page VirtualBox Community Bulletin.pdf.  No point in me restating them.If you and your organization haven't tried VirtualBox, or you haven't looked at it in a while, you owe it to yourself to give this a run.  This is small, simple, powerful, software that allows you to do way more than most people would ever need in hosting a Virtual machine on you local machine.  I routinely will do a demo on a two-year-old Macbook running OS X locally, plus a Solaris 10 VM running the Sun Ray server, and a Windows XP VM and hang a couple Sun Rays off of it - and the performance is stellar.You can subscribe to the mailing lists and get access to the Beta releases as they come out as well, if you are into 'bleeding edge'.40,000 downloads a day is the current rate (before this new release), but it will jump for sure now.  Might as well join in!  

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  • Can Foswiki be used as a distributed Redmine replacement? [closed]

    - by Tobias Kienzler
    I am quite familiar with and love using git, among other reasons due to its distributed nature. Now I'd like to set up some similarly distributed (FOSS) Project Management software with features similar to what Redmine offers, such as Issue & time tracking, milestones Gantt charts, calendar git integration, maybe some automatic linking of commits and issues Wiki (preferably with Mathjax support) Forum, news, notifications Multiple Projects However, I am looking for a solution that does not require a permanently accesible server, i.e. like in git, each user should have their own copy which can be easily synchronized with others. However it should be possible to not have a copy of every Project on every machine. Since trac uses multiple instances for multiple projects anyway, I was considering using that, but I neither know how well it adapts to simply giting the database itself (which would be be easiest way to handle the distribution due to git being used anyway), nor does it include all of Redmine's feature. After checking http://www.wikimatrix.org for Wikis with integrated tracking system and RCS support, and filtering out seemingly stale project, the choices basically boil down to Foswiki, TWiki and Ikiwiki. The latter doesn't seem to offer as many usability features, and in the TWiki vs Foswiki issue I tend to the latter. Finally, there is Fossil, which starts from the other end by attempting to replace git entirely and tracking itself. I am however not too comfortable with the thought of replacing git, and Fossil's non-SCM features don't seem to be as developed. Now before I invest too much time when someone else might already have tried this, I basically have two questions: Are there crucial features of Project Management software like Redmine that Foswiki does not provide even with all the extensions available? How to set Foswiki up to use git instead of the perl RcsLite?

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  • Do you play Sudoku ?

    - by Gilles Haro
    Did you know that 11gR2 database could solve a Sudoku puzzle with a single query and, most of the time, and this in less than a second ? The following query shows you how ! Simply pass a flattened Sudoku grid to it a get the result instantaneously ! col "Solution" format a9 col "Problem" format a9 with Iteration( initialSudoku, Step, EmptyPosition ) as ( select initialSudoku, InitialSudoku, instr( InitialSudoku, '-' )        from ( select '--64----2--7-35--1--58-----27---3--4---------4--2---96-----27--7--58-6--3----18--' InitialSudoku from dual )    union all    select initialSudoku        , substr( Step, 1, EmptyPosition - 1 ) || OneDigit || substr( Step, EmptyPosition + 1 )         , instr( Step, '-', EmptyPosition + 1 )      from Iteration         , ( select to_char( rownum ) OneDigit from dual connect by rownum <= 9 ) OneDigit     where EmptyPosition > 0       and not exists          ( select null              from ( select rownum IsPossible from dual connect by rownum <= 9 )             where OneDigit = substr( Step, trunc( ( EmptyPosition - 1 ) / 9 ) * 9 + IsPossible, 1 )   -- One line must contain the 1-9 digits                or OneDigit = substr( Step, mod( EmptyPosition - 1, 9 ) - 8 + IsPossible * 9, 1 )      -- One row must contain the 1-9 digits                or OneDigit = substr( Step, mod( trunc( ( EmptyPosition - 1 ) / 3 ), 3 ) * 3           -- One square must contain the 1-9 digits                            + trunc( ( EmptyPosition - 1 ) / 27 ) * 27 + IsPossible                            + trunc( ( IsPossible - 1 ) / 3 ) * 6 , 1 )          ) ) select initialSudoku "Problem", Step "Solution"    from Iteration  where EmptyPosition = 0 ;   The Magic thing behind this is called Recursive Subquery Factoring. The Oracle documentation gives the following definition: If a subquery_factoring_clause refers to its own query_name in the subquery that defines it, then the subquery_factoring_clause is said to be recursive. A recursive subquery_factoring_clause must contain two query blocks: the first is the anchor member and the second is the recursive member. The anchor member must appear before the recursive member, and it cannot reference query_name. The anchor member can be composed of one or more query blocks combined by the set operators: UNION ALL, UNION, INTERSECT or MINUS. The recursive member must follow the anchor member and must reference query_name exactly once. You must combine the recursive member with the anchor member using the UNION ALL set operator. This new feature is a replacement of this old Hierarchical Query feature that exists in Oracle since the days of Aladdin (well, at least, release 2 of the database in 1977). Everyone remembers the old syntax : select empno, ename, job, mgr, level      from   emp      start with mgr is null      connect by prior empno = mgr; that could/should be rewritten (but not as often as it should) as withT_Emp (empno, name, level) as        ( select empno, ename, job, mgr, level             from   emp             start with mgr is null             connect by prior empno = mgr        ) select * from   T_Emp; which uses the "with" syntax, whose main advantage is to clarify the readability of the query. Although very efficient, this syntax had the disadvantage of being a Non-Ansi Sql Syntax. Ansi-Sql version of Hierarchical Query is called Recursive Subquery Factoring. As of 11gR2, Oracle got compliant with Ansi Sql and introduced Recursive Subquery Factoring. It is basically an extension of the "With" clause that enables recursion. Now, the new syntax for the query would be with T_Emp (empno, name, job, mgr, hierlevel) as       ( select E.empno, E.ename, E.job, E.mgr, 1 from emp E where E.mgr is null         union all         select E.empno, E.ename, E.job, E.mgr, T.hierlevel + 1from emp E                                                                                                            join T_Emp T on ( E.mgr = T.empno ) ) select * from   T_Emp; The anchor member is a replacement for the "start with" The recursive member is processed through iterations. It joins the Source table (EMP) with the result from the Recursive Query itself (T_Emp) Each iteration works with the results of all its preceding iterations.     Iteration 1 works on the results of the first query     Iteration 2 works on the results of Iteration 1 and first query     Iteration 3 works on the results of Iteration 1, Iteration 2 and first query. So, knowing that, the Sudoku query it self-explaining; The anchor member contains the "Problem" : The Initial Sudoku and the Position of the first "hole" in the grid. The recursive member tries to replace the considered hole with any of the 9 digit that would satisfy the 3 rules of sudoku Recursion progress through the grid until it is complete.   Another example :  Fibonaccy Numbers :  un = (un-1) + (un-2) with Fib (u1, u2, depth) as   (select 1, 1, 1 from dual    union all    select u1+u2, u1, depth+1 from Fib where depth<10) select u1 from Fib; Conclusion Oracle brings here a new feature (which, to be honest, already existed on other concurrent systems) and extends the power of the database to new boundaries. It’s now up to developers to try and test it and find more useful application than solving puzzles… But still, solving a Sudoku in less time it takes to say it remains impressive… Interesting links: You might be interested by the following links which cover different aspects of this feature Oracle Documentation Lucas Jellema 's Blog Fibonaci Numbers

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  • links for 2011-02-22

    - by Bob Rhubart
    Eleven BI trends for 2011 | ITWeb Business Intelligence (tags: ping.fm) The Buttso Blathers: WebLogic Schema Files Buttso shares a link. (tags: orale weblogic) Cloud Computing & Enterprise Architecture | Open Group Blog "On the first look, it may seem like Enterprise Architecture is irrelevant in a company if your complete IT is running on Cloud Computing, SaaS and outsourcing/offshoring. I was of the same opinion last year. However, it is not the case. In fact, the complexity is going to get multiplied." (tags: opengroup cloud enterprisearchitecture) James Taylor: Change Logging Level for SOA 11g James says: "I’m sure there are many blogs out there that have this solution. But I seem to get asked this question a lot so I thought I would post it here for my convenience. (tags: oracle middleware soa) David Linthicum: The Truth behind Standards, SOA, and Cloud Computing "Most of the standards we've worked on in the world of SOA over the past several years are applicable to the world of cloud computing. Cloud computing is simply a change in platform, and the existing architectural standards we leverage should transfer nicely to the cloud computing space." - David Linthicum (tags: enterprisearchitecture soa cloud) C. Martin Harris, MD: HIMSS11 Update from the Chairman "We cannot allow ourselves to focus exclusively on near term goals. Our real goal is a technology-driven transformation of healthcare that will never stop. A true transformation is a process of lessons learned and applied, that continually open broad new horizons of opportunity." - C. Martin Harris, MD (tags: enterprisearchitecture modernization)

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