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• Big Data for Retail

  - by David Dorf

  Right up there with mobile, social, and cloud is the term "big data," which seems to be popping up lots in the press these days.  Companies like Google, Yahoo, and Facebook have popularized a new class of data technologies meant to solve the problem of processing large amounts of data quickly.  I first mentioned this in a posting back in March 2009.  Put simply, big data implies datasets so large they can't normally be processed using a standard transactional database.  The term "noSQL" is often used in this context as well. Actually, using parallel processing within the Oracle database combined with Exadata can achieve impressive results.  Look for more from Oracle at OpenWorld as hinted by Jean-Pierre Dijcks. McKinsey recently released a report on big data in which retail was specifically mentioned as an industry that can benefit from the new technologies.  I won't rehash that report because my friend Rama already did such a good job in his posting, Impact of "Big Data" on Retail. The presentation below does a pretty good job of framing the problem, although it doesn't really get into the available technologies (e.g. Exadata, Hadoop, Cassandra, etc.) and isn't retail specific. Determine the Right Analytic Database: A Survey of New Data Technologies So when a retailer asks me about big data, here's what I say:  Big data refers to a set of technologies for processing large volumes of structured and unstructured data.  Imagine collecting everything uttered by your customers on Facebook and Twitter and combining it with all the data you can find about the products you sell (e.g. reviews, images, demonstration videos), including competitive data.  Assuming you could process all that data, you could then personalize offers to specific customers based on their tastes, ensure prices are competitive, and implement better local assortments.  It's really not that far off.

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• SQLAuthority News – 2 Whitepapers Announced – AlwaysOn Architecture Guide: Building a High Availability and Disaster Recovery Solution

  - by pinaldave

  Understanding AlwaysOn Architecture is extremely important when building a solution with failover clusters and availability groups. Microsoft has just released two very important white papers related to this subject. Both the white papers are written by top experts in industry and have been reviewed by excellent panel of experts. Every time I talk with various organizations who are adopting the SQL Server 2012 they are always excited with the concept of the new feature AlwaysOn. One of the requests I often here is the related to detailed documentations which can help enterprises to build a robust high availability and disaster recovery solution. I believe following two white paper now satisfies the request. AlwaysOn Architecture Guide: Building a High Availability and Disaster Recovery Solution by Using AlwaysOn Availability Groups SQL Server 2012 AlwaysOn Availability Groups provides a unified high availability and disaster recovery (HADR) solution. This paper details the key topology requirements of this specific design pattern on important concepts like quorum configuration considerations, steps required to build the environment, and a workflow that shows how to handle a disaster recovery. AlwaysOn Architecture Guide: Building a High Availability and Disaster Recovery Solution by Using Failover Cluster Instances and Availability Groups SQL Server 2012 AlwaysOn Failover Cluster Instances (FCI) and AlwaysOn Availability Groups provide a comprehensive high availability and disaster recovery solution. This paper details the key topology requirements of this specific design pattern on important concepts like asymmetric storage considerations, quorum model selection, quorum votes, steps required to build the environment, and a workflow. If you are not going to implement AlwaysOn feature, this two Whitepapers are still a great reference material to review as it will give you complete idea regarding what it takes to implement AlwaysOn architecture and what kind of efforts needed. One should at least bookmark above two white papers for future reference. Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Documentation, SQL Download, SQL Query, SQL Server, SQL Tips and Tricks, SQL White Papers, T SQL, Technology Tagged: AlwaysOn

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• Performance Optimization &ndash; It Is Faster When You Can Measure It

  - by Alois Kraus

  Performance optimization in bigger systems is hard because the measured numbers can vary greatly depending on the measurement method of your choice. To measure execution timing of specific methods in your application you usually use Time Measurement Method Potential Pitfalls Stopwatch Most accurate method on recent processors. Internally it uses the RDTSC instruction. Since the counter is processor specific you can get greatly different values when your thread is scheduled to another core or the core goes into a power saving mode. But things do change luckily: Intel's Designer's vol3b, section 16.11.1 "16.11.1 Invariant TSC The time stamp counter in newer processors may support an enhancement, referred to as invariant TSC. Processor's support for invariant TSC is indicated by CPUID.80000007H:EDX[8]. The invariant TSC will run at a constant rate in all ACPI P-, C-. and T-states. This is the architectural behavior moving forward. On processors with invariant TSC support, the OS may use the TSC for wall clock timer services (instead of ACPI or HPET timers). TSC reads are much more efficient and do not incur the overhead associated with a ring transition or access to a platform resource." DateTime.Now Good but it has only a resolution of 16ms which can be not enough if you want more accuracy.   Reporting Method Potential Pitfalls Console.WriteLine Ok if not called too often. Debug.Print Are you really measuring performance with Debug Builds? Shame on you. Trace.WriteLine Better but you need to plug in some good output listener like a trace file. But be aware that the first time you call this method it will read your app.config and deserialize your system.diagnostics section which does also take time.   In general it is a good idea to use some tracing library which does measure the timing for you and you only need to decorate some methods with tracing so you can later verify if something has changed for the better or worse. In my previous article I did compare measuring performance with quantum mechanics. This analogy does work surprising well. When you measure a quantum system there is a lower limit how accurately you can measure something. The Heisenberg uncertainty relation does tell us that you cannot measure of a quantum system the impulse and location of a particle at the same time with infinite accuracy. For programmers the two variables are execution time and memory allocations. If you try to measure the timings of all methods in your application you will need to store them somewhere. The fastest storage space besides the CPU cache is the memory. But if your timing values do consume all available memory there is no memory left for the actual application to run. On the other hand if you try to record all memory allocations of your application you will also need to store the data somewhere. This will cost you memory and execution time. These constraints are always there and regardless how good the marketing of tool vendors for performance and memory profilers are: Any measurement will disturb the system in a non predictable way. Commercial tool vendors will tell you they do calculate this overhead and subtract it from the measured values to give you the most accurate values but in reality it is not entirely true. After falling into the trap to trust the profiler timings several times I have got into the habit to Measure with a profiler to get an idea where potential bottlenecks are. Measure again with tracing only the specific methods to check if this method is really worth optimizing. Optimize it Measure again. Be surprised that your optimization has made things worse. Think harder Implement something that really works. Measure again Finished! - Or look for the next bottleneck. Recently I have looked into issues with serialization performance. For serialization DataContractSerializer was used and I was not sure if XML is really the most optimal wire format. After looking around I have found protobuf-net which uses Googles Protocol Buffer format which is a compact binary serialization format. What is good for Google should be good for us. A small sample app to check out performance was a matter of minutes: using ProtoBuf; using System; using System.Diagnostics; using System.IO; using System.Reflection; using System.Runtime.Serialization; [DataContract, Serializable] class Data { [DataMember(Order=1)] public int IntValue { get; set; } [DataMember(Order = 2)] public string StringValue { get; set; } [DataMember(Order = 3)] public bool IsActivated { get; set; } [DataMember(Order = 4)] public BindingFlags Flags { get; set; } } class Program { static MemoryStream _Stream = new MemoryStream(); static MemoryStream Stream { get { _Stream.Position = 0; _Stream.SetLength(0); return _Stream; } } static void Main(string[] args) { DataContractSerializer ser = new DataContractSerializer(typeof(Data)); Data data = new Data { IntValue = 100, IsActivated = true, StringValue = "Hi this is a small string value to check if serialization does work as expected" }; var sw = Stopwatch.StartNew(); int Runs = 1000 * 1000; for (int i = 0; i < Runs; i++) { //ser.WriteObject(Stream, data); Serializer.Serialize<Data>(Stream, data); } sw.Stop(); Console.WriteLine("Did take {0:N0}ms for {1:N0} objects", sw.Elapsed.TotalMilliseconds, Runs); Console.ReadLine(); } } The results are indeed promising: Serializer Time in ms N objects protobuf-net   807 1000000 DataContract 4402 1000000 Nearly a factor 5 faster and a much more compact wire format. Lets use it! After switching over to protbuf-net the transfered wire data has dropped by a factor two (good) and the performance has worsened by nearly a factor two. How is that possible? We have measured it? Protobuf-net is much faster! As it turns out protobuf-net is faster but it has a cost: For the first time a type is de/serialized it does use some very smart code-gen which does not come for free. Lets try to measure this one by setting of our performance test app the Runs value not to one million but to 1. Serializer Time in ms N objects protobuf-net 85 1 DataContract 24 1 The code-gen overhead is significant and can take up to 200ms for more complex types. The break even point where the code-gen cost is amortized by its faster serialization performance is (assuming small objects) somewhere between 20.000-40.000 serialized objects. As it turned out my specific scenario involved about 100 types and 1000 serializations in total. That explains why the good old DataContractSerializer is not so easy to take out of business. The final approach I ended up was to reduce the number of types and to serialize primitive types via BinaryWriter directly which turned out to be a pretty good alternative. It sounded good until I measured again and found that my optimizations so far do not help much. After looking more deeper at the profiling data I did found that one of the 1000 calls did take 50% of the time. So how do I find out which call it was? Normal profilers do fail short at this discipline. A (totally undeserved) relatively unknown profiler is SpeedTrace which does unlike normal profilers create traces of your applications by instrumenting your IL code at runtime. This way you can look at the full call stack of the one slow serializer call to find out if this stack was something special. Unfortunately the call stack showed nothing special. But luckily I have my own tracing as well and I could see that the slow serializer call did happen during the serialization of a bool value. When you encounter after much analysis something unreasonable you cannot explain it then the chances are good that your thread was suspended by the garbage collector. If there is a problem with excessive GCs remains to be investigated but so far the serialization performance seems to be mostly ok.  When you do profile a complex system with many interconnected processes you can never be sure that the timings you just did measure are accurate at all. Some process might be hitting the disc slowing things down for all other processes for some seconds as well. There is a big difference between warm and cold startup. If you restart all processes you can basically forget the first run because of the OS disc cache, JIT and GCs make the measured timings very flexible. When you are in need of a random number generator you should measure cold startup times of a sufficiently complex system. After the first run you can try again getting different and much lower numbers. Now try again at least two times to get some feeling how stable the numbers are. Oh and try to do the same thing the next day. It might be that the bottleneck you found yesterday is gone today. Thanks to GC and other random stuff it can become pretty hard to find stuff worth optimizing if no big bottlenecks except bloatloads of code are left anymore. When I have found a spot worth optimizing I do make the code changes and do measure again to check if something has changed. If it has got slower and I am certain that my change should have made it faster I can blame the GC again. The thing is that if you optimize stuff and you allocate less objects the GC times will shift to some other location. If you are unlucky it will make your faster working code slower because you see now GCs at times where none were before. This is where the stuff does get really tricky. A safe escape hatch is to create a repro of the slow code in an isolated application so you can change things fast in a reliable manner. Then the normal profilers do also start working again. As Vance Morrison does point out it is much more complex to profile a system against the wall clock compared to optimize for CPU time. The reason is that for wall clock time analysis you need to understand how your system does work and which threads (if you have not one but perhaps 20) are causing a visible delay to the end user and which threads can wait a long time without affecting the user experience at all. Next time: Commercial profiler shootout.

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• GPLv2 - Multiple AI chess engines to bypass GPL

  - by Dogbert

  I have gone through a number of GPL-related questions, the most recent being this one: http://stackoverflow.com/questions/3248823/legal-question-about-the-gpl-license-net-dlls/3249001#3249001 I'm trying to see how this would work, so bear with me. I have a simple GUI interface for a game of Chess. It essentially can send/receive commands to/from an external chess engine (ie: Tong, Fruit, etc). The application/GUI is similar in nature to XBoard ( http://www.gnu.org/software/xboard/ ), but was independently designed. After going through a number of threads on this topic, it seems that the FSF considers dynamically linking against a GPLv2 library as a derivative work, and that by doing so, the GPLv2 extends to my proprietary code, and I must release the source to my entire project. Other legal precedents indicate the opposite, and that dynamic linking doesn't cause the "viral" effect of the GPL to propagate to my proprietary code. Since there is no official consensus that can give a "hard-and-fast" answer to the dynamic linking question, would this be an acceptable alternative: I build my chess GUI so that it sends/receives the chess engine AI logic as text commands from an external interface library that I write The interface library I wrote itself is then released under the GPL The interface library is only used to communicate via a generic text pipe to external command-line chess engines The chess engine itself would be built as a command-line utility rather than as a library of any sort, and just sends strings in the Universal Chess Interface of Chess Engine Communication Protocol ( http://en.wikipedia.org/wiki/Chess_Engine_Communication_Protocol ) format. The one "gotcha" is that the interface library should not be specific to one single GPL'ed chess engine, otherwise the entire GUI would be "entirely dependent" on it. So, I just make my interface library so that it is able to connect to any command-line chess engine that uses a specific format, rather than just one unique engine. I could then include pre-built command-line-app versions of any of the chess engines I'm using. Would that sort of approach allow me to do the following: NOT release the source for my UI Release the source of the interface library I built (if necessary) Use one or more chess engines and bundle them as external command-line utilities that ship with a binary version of my UI Thank you.

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• Speaking at DevReach

  - by Sahil Malik

  Ad:: SharePoint 2007 Training in .NET 3.5 technologies (more information). Next week, I will be speaking at Devreach on the following topics - Authoring custom WCF services in SharePoint Sahil Malik, Level 400 We live in a different world today! Gone are the times when you built your webparts around postbacks! Welcome silverlight, jquery, bing maps, google maps, and many others! And there are many enhancements in SharePoint 2010 that let you build such applications, the question is which is right for you? In this session Sahil compares WCF REST Services in SharePoint, The client object model, and custom WCF services, and then dives deep into the WCF aspects of SharePoint. All code, very few slides!   Scalability and Performance of SharePoint 2010 Sahil Malik, Level 400 If there is a topic that has more misinformation than anything else, it has to be the scalability and performance aspects of SharePoint. Did you know, SharePoint 2010 has some real world, under the covers improvement that help it perform and scale better? This session involves taking a deep look under the covers into the specific improvements Microsoft has made between SharePoint 2007 and SharePoint 2010 that truly qualifies SharePoint 2010 as an enterprise scalable product. This doesn't mean the product doesn't have limits - but this session is a lot more than just limits written on a powerpoint slide. This presentation is a true under the scenes look at specific improvements!   Devreach is a premier conference, check out their very impressive speaker and sessions line up. Comment on the article ....

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• WCI Analytics Installation / Configuration Support Webinar

  - by brian.harrison

  Based on the success of the OAM / WCI integration webinar, the second in our series of Technical Support "brown bag" webinars will be delivered on Tuesday, March 30 at 8AM Pacific Daylight Time. Please review the details below, if you would like to attend the webinar, please take a moment to send an email to the address provided for registration and you will be enrolled in the meeting. What are the best practices for installing and configuring Analytics for the WebCenter Interaction (formerly "ALUI") Portal Application? What are some of the most common failures that occur in this implementation and what can be done to correct these common issues? What are the most common reasons for the tables to be "empty" when I try to produce utilization reports? These are just some of the main areas that will be covered in this one hour webinar which will demonstrate the WCI Analytics installation and configuration in action. Our demonstration will focus on areas where Technical Support sees the largest numbers of customer questions become support incidents in an effort to help avoid the need to create an incident to get the implementation working properly in the customer environment. We will demonstrate the most recent version of WCI Analytics (10.3.0.1) for this presentation, but naturally specific issues known to specific versions will be covered as well. Please join us for what we know will be a valuable and relevant learning session. If you would like to attend this session please send an email to [email protected] indicating your interest, and we will respond to you with a meeting invitation including all of the required access information.

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• DLP projector has odd colors

  - by torbengb

  At my place of work, we have several different video projectors, but they all use DLP technology, and the colors are wrong: for instance, yellow looks more like green, and all other colors are similarly distorted. Any kind of presentation or collaborative work is hindered by these wrong colors. On the laptop screen, the colors are fine but on the projector (hooked up via normal short VGA cable, and showing the same image at the same time), the colors look wrong. This is not about one specific projector or one specific laptop; it seems that any combination of projector + laptop has the exact same problem. Someone said that DLP is poor technology, but that's not true. I'm using a DLP projector at home (regular PC connected via HDMI) and the colors are excellent. Still, there's some kind of curse on the machinery at work. How can we get decent colors?

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• Create a Windows Image for Deployment

  - by Kiranu

  In my company we have 8 laptops that we use to deploy on the field. These machines get assigned to a user for a certain time and run Windows Vista. All the machines are the same model. After the machine is returned, it is company policy to completely format the machine and go back to a predetermined configuration. Right now, what we do is we use the recovery utility in the laptop (we are a small shop so we use the OEM Windows license that the laptops come with) and manually uninstall and change the configuration in order to bring it to our baseline config. I know that there are ways to create an image that gets copied to the hard drive with a specific configuration and with specific software installed (thats what OEMs do right?). I'm looking for a tool or a tutorial or something that explains as simply as possible how to create such an image. Thanks a lot

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• Looking for a good free or cheap task tracking system

  - by JWood

  I've finally decided that pen and paper/whiteboards are not up to the job as my workload increases so I'm looking for a good task tracking system. I need something that can track tasks in categories (projects) and allow me to assign priority to each task. I've tried iTeamWork which requires projects to have an end time which is no good for me as at least one of my projects is ongoing. I also tried Teamly which was required tasks to be set to a specific day which is no good as tasks sometimes take more than a day and I would like them organised by priority rather than specific days. Preferably looking for something hosted but I'm happy to install on our servers if it supports PHP/MySQL. Oh, and an iPhone client would be the icing on the cake! Can anyone recommend anything?

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• What are the implications of expanding an internal subnet mask?

  - by Philip

  Our network is currently working on a 192.168.0.x subnet, all controlled through DHCP, except for the few main servers who have hard-configured IP address settings. What would I kill if I changed the DHCP-published subnet mask from 255.255.255.0 to 255.255.0.0? The reason for doing this is not because we have a huge sudden influx of machines, but because I'd like to start partitioning specific devices into specific IP ranges (to be neat and tidy). For what its worth, I don' plan on changing the allocated DHCP address range, but rather want to move some of the reserved and excluded DHCP addresses out of the address pool. e.g. printers will be 192.168.2.x I will obviously need to change the subnet mask manually on my manually configured devices.

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• How to configure Linux to open files by extension?

  - by Gregory MOUSSAT

  The various Linux's desktops open files according to their mime type. This is a very nice feature but I also need to open them by extension (as with Windows). For instance, I want to open every xxxxx.vnc files with a specific program when I double-click on them. I use xfce but I don't think it differs from Gnome or KDE because all of them use the same configuration files (defaults.list and mimeapps.list). If possible the settings are user specific, not system wide. I've found some very poor informations about that, and all are system wide, so may be wiped out by some updates.

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• Should I install an AV product on my domain controller?

  - by mhud

  Should I run a server-specific antivirus, regular antivirus, or no antivirus at all on my servers, particularly my Domain Controllers? Here's some background about why I'm asking this question: I've never questioned that antivirus software should be running on all windows machines, period. Lately I've had some obscure Active Directory related issues that I have tracked down to antivirus software running on our domain controllers. The specific issue was that Symantec Endpoint Protection was running on all domain controllers. Occasionally, our Exchange server triggered a false-positive in Symantec's "Network Threat Protection" on each DC in sequence. After exhausting access to all DCs, Exchange began refusing requests, presumably because it could not communicate with any Global Catalog servers or perform any authentication. Outages would last about ten minutes at a time, and would occur once every few days. It took a long time to isolate the problem because it was not easily reproducible and generally investigation was done after the issue resolved itself.

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• Sql Server security Issue

  - by MZT

  how to add Sql server user for specific database with backup and restore permission only ??

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• New Whitepaper: Primer on Integrating with EBS 12 with Other Applications

  - by Rekha Ayothi

  Oracle E-Business Suite offers several integration points and a variety of integration technologies. While a given integration point may be available through various technologies and products, it is important to select the best approach for your specific integration requirements. I am pleased to announce the publication of a new white paper that can help with this: Oracle E-Business Suite Release 12.1.3 - Integration Products and Technologies Primer (Note 1494997.1) This whitepaper reviews integration strategies for Oracle E-Business Suite applications that are available today. The intended audience is solution architects, integration consultants, and anyone else interested in learning about integration options with Oracle E-Business Suite. The white paper outlines the following enterprise application integration styles: Data-centric integration Integration through native interfaces Process-centric integration Event-driven integration B2B integration Integration through web services  The white paper also discusses Oracle E-Business Suite application layer products and technologies that address the specific needs of each of these integration styles. It concludes with criteria for selecting the appropriate integration-related tools and technologies for your requirements. Attending OpenWorld 2012? We have two sessions covering Oracle E-Business Suite integration. Please join us to hear more on this subject: CON9005 - Oracle E-Business Suite Integration Best Practices ( Tuesday, Oct 2, 1:15 PM - 2:15 PM - Moscone West 2018) CON8716 - Web Services and SOA Integration Options for Oracle E-Business Suite ( Thursday, Oct 4, 11:15 AM - 12:15 PM - Moscone West 2016)  Related Articles E-Business Suite Technology Sessions at OpenWorld 2012 Webcast Replay Available: SOA Integration Options for E-Business Suite BPEL 11.1.1.6 Certified for Prebuilt E-Business Suite 12.1.3 SOA Integrations New Whitepaper: Defining Web Applications Desktop Integrators That Return Error Messages

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• How to manage groups and users in Jenkins

  - by Michael

  I'm trying to use role based security plugin in Jenkins, but i'm not sue i am using it right. I've decided to go with jenkin's own user database as a security realm instead of LDAP. i'm adding the users one by one. Now in the Assign Roles screen, i have global roles like administrator, read only etc... and i have project specific roles like prod_a_developer, prod_b_developer... For each user, do i have to both assign one of the global roles for him and also assign a specific project role ? Also, how do i assign a user to a group ? instead of assigning each user a global role i want to assign a group a global role. not so trivial, Can someone please help me ? Thanks.

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• Automatic desktop/work environment setup

  - by Alex

  I have this strange thing I am trying to do, so before I jump into it I was curious if someone knows about existing solution or maybe have an advice as far as implementation. I run a small software company and as it happens I often do very different type of work. When I do coding for Java project I need Eclipse running and maybe VM with something like ActiveMQ server or whatever, plus terminals to tail -F log files specific to the application, etc. When I do something like weekly progress review with my team I need a few browser windows open and a gedit to take notes and so on. Depending on the type of work I am doing I generally have all of the related apps open in multiple different Workspaces. So in the example above Eclipse would be open in Workspace 1, terminals would be sharing Workspace 2 and so on. What I am trying to do is to automate opening of all these applications, positinoning them on the screen and assigning them to proper Workspaces. My current idea consists of having a Shell script that launches specific apps depending on what type of work I am about to start doing. Is there anything to aid this type of automation? Or is my only option is just a shell scripting at this point? My current system is Ubuntu 10.04

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• How to run adb command through a script

  - by Outride

  As the title says, I'm trying to find how to run adb commands through a pre-written script (such as how .bat and .vbs files work) so I can make a semi automatic program to pull some files from my android phone whenever I click on the launch.bat which launches a line of program to go through the phone and find certain files. I know the script line: adb pull /data/data/kik.android/databases/ %drive%\All\Database This copies all the files in this specific database into the flash drive's folder "Database" under the "All" folder. But, how could i make it so that the adb program looks through the phone and finds other files, and how could i pull the specific files, rather than pulling the entire folder?

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• Excel help vlookup

  - by user123953

  I need a little help with some excel Employee Locations Hours OT Mr.One Station 1 40 6 Mrs.Seven Station 2 30 6 Mr.Two Station 3 30 4 Mr.Three Station 4 40 4 Mrs.Eight Station 1 32 6 Mr.Four Station 2 32 7 Mrs.Nine Station 3 40 6 Mr.Five Station 4 40 7 Mr.Six Station 1 25 2 Mrs.Ten Station 2 40 3 Mr.Eleven Station 3 60 1 I have spreadsheet with to worksheets one is the data sheet (shown above) on the other sheet is a summary, that has the Locations column as data validation list. I wanna use the data validation list to pull all the people and info from a specific location. I tried using a vlookup put I only know how to use to pull one person at a time not a group of specific to a location.

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• How can I determine which named property (or properties) are filling my exchange 2007 information st

  - by Mikey B

  Hi Guys, I'm experiencing the following error on an Exchange 2007 server: Event ID: 9667 Type: Error Category: General Source: msgidNamedPropsQuotaError Description: Failed to create a new named property for database "" because the number of named properties reached the quota limit (). User attempting to create the named property: . Named property GUID: . Named property name/id: . I understand that this can occur if the exchange information store is filling up with named properties... but I don't know how to determine which specific named property is at fault here. Is there a way to examine the DB for this type of info to see if there's a specific recurring named property that is consuming resources? -M

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• jump to page of a pdf in google docs / drive / apps

  - by Aaron - Solution Evangelist

  i want to jump to a specific page of a pdf file via the google docs via the editor url https://docs.google.com/file/d/xxx/edit or the embed url https://docs.google.com/file/d/xxx/preview i am not looking to use the http://docs.google.com/gview?url= referenced in the stackoverflow question how to open specific page on Google's docs viewer as i want to do this for documents where authentication is required the the document is not available via public url. is there some way of appending an anchor (i would have expected it to be https://docs.google.com/file/d/xxx/preview#10) or a query (e.g. https://docs.google.com/file/d/xxx/preview?page=10) to the google docs / drive / apps viewer?

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• Looking for Driver Diagnostic and Repair Software

  - by risingTide

  Greetings, I am currently plagued with BSODS on startup (both normal and safe mode) for my XP Pro. After much troubleshooting I have determined it is a driver problem. However, because I cannot even boot I do not know how to fix it. I am looking for some specific driver diagnostic and repair software that I can use from another computer to access and fix the driver problem on the problematic XP drive. (I can access the problematic drive via USB from another computer.) I will offer more details about my specific situation if it is helpful or necessary. Thank you for your time!

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• varnish3, mod_geoip with apache2 using mod_rewrite and mod_rpaf

  - by mursalat

  I am maintaining a website with 3 different versions of the site, with 3 different languages, handles with a single system written in php, which takes in environment variables based on the domain name that is being accessed. These are the three sites: myshop.com : english international version myshop.eu : european version of site myshop.ru : russian version of the site when myshop.com is accessed from russia it is to be redirected to myshop.ru, and any country from europe accesses myshop.com, is redirected to myshop.eu, and international visitors stay at myshop.com, although they can go to the country specific site. All these redirections for the country is done using GeoIP apache2 mod in order to determine the country code, which is used in a RewriteCondition to state a RewriteRule, there are some exceptions of IPs that do not do the rewrite for, basically the IPs of the developer's PCs. The site has been doing just fine, until we decided to setup varnish to give the site a boost, it really did give it a great boost, but the country specific rewrites has become buggy. What started to happen is that a russian visitor can go to myshop.com and won't be redirected, until he clicks a random link (perhaps a link not cached by varnish yet) and the user is redirected to their specific country. For that i setup mod_rpaf, and for exceptions to the rewrite rule (for the developer's ip), i used this RewriteCond %{HTTP:X-FORWARDED-FOR} !^43\.43\.43\.43, and i restarted varnish and apache2, it worked for a while, then it messed up again. And whole day i have been doing changes however i have little no clue as to what's going on, sometimes it works, and sometimes it doesn't, and sometimes it half works, etc... As for geoip, i used a php to check the $_SERVER variable, and here is the general idea of the output [HTTP_X_FORWARDED_FOR] => 43.43.43.44 [HTTP_X_VARNISH] => 1705675599 [SERVER_ADDR] => 127.0.0.1 [SERVER_PORT] => 80 [REMOTE_ADDR] => 43.43.43.44 [GEOIP_ADDR] => 43.43.43.44 [GEOIP_CONTINENT_CODE] => EU [GEOIP_COUNTRY_CODE] => FR [GEOIP_COUNTRY_NAME] => France Now, thanks to the "random" redirects, i hardly have a clue as to what is going on, so can you guys please give me some ideas as to what tools to use to debug this? I have tried to see the redirect logs, but they really dont show much, and varnishlog isn't helping much either - although i must admit i am no professional at varnish. I believe the problem is with varnish trying to cache the url, and thus apache redirects are not being done properly, however visits the site first has a redirect, and based on that other users are served the content, depending on from where the user was when the cache was last updated, is it correct? if so, how can i solve the problem? Also, i have the option of using geoip redirects on varnish3 instead of using apache2 to do the redirects, is that what the best practice is? Any suggestion as to debugging this or to fix this would be helpful! thnx!

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• Can I completely remove the Windows DNS in favour of BIND9 in an AD network?

  - by Vinícius Ferrão

  I would like to remove the DNS feature of Windows Domain Controllers and point the DNS servers to our BIND9 servers. I know it's possible to setup coexistence but this requires a number of extra Windows DNS Servers equals to the number of Domain Controllers in the network. Active Directory expects the _msdcs zone and other things like _tcp, _udp; etc. The main question is: how to make BIND9 takes care of all this AD specific data? And with dynamic updating to make AD even more happier. Thanks, PS: Making BIND9 points to the Windows DNS Servers to resolve the Active Directory specific zones isn't an option. We already do this... EDIT: As today, I'm running without Windows DNS. I'm writing up a guide on how to do this, and I'll update this topic.

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• Securing a Windows Server 2008 R2 Public Web Server

  - by Denny Ferrassoli

  I'm setting up a public web server: Windows Server 2008 R2, IIS7.5. Does anyone have a tutorial / walkthrough / tips on properly securing a public web server? I've seen a few tutorials but mostly focused on Windows Server 2003. What I've done so far: Created a specific user account for the website / app pool, Renamed Admin account, Installed FTPS, Configured firewall to block any non-public service (web / https), Configured firewall to allow access to management interfaces only from specific IP addresses (rdp, IIS management, ftp) Maybe a few other things but can't remember at the moment... ICMP is allowed... Should I disable all except ping? Port scan reveals only web and https ports. Any other suggestions? Thanks

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• July, the 31 Days of SQL Server DMO’s – Day 3 (sys.dm_exec_connections)

  - by Tamarick Hill

    The third DMV we will review is the sys.dm_exec_connections DMV. This DMV is Server-Scoped and displays information about each and every current connection on your SQL Server Instance. Lets take a look at some information that this DMV returns. SELECT * FROM sys.dm_exec_connections After reviewing this DMV, in my opinion, its not a whole lot of useful information returned from this DMV from a monitoring or troubleshooting standpoint. The primary use case I have for this DMV is when I need to get a quick count of how many connections I have on one of my SQL Server boxes. For this purpose a quick SELECT COUNT(*) satisfies my need. However, for those who need it, there is other information such as what type of authentication a specific connection is using, network packet size, and client/local TCP ports being used. This information can come in handy for specific scenarios but you probably wont need it very much for your day to day monitoring/troubleshooting needs. However, this is still an important DMV that you should be aware of in the event that you need it. For more information on this DMV, please see the below Books Online link: http://msdn.microsoft.com/en-us/library/ms181509.aspx

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