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  • On Solaris, what is the difference between cut and gcut?

    - by Chris J
    I recently came across this crazy script bug on one of my Solaris machines. I found that cut on Solaris skips lines from the files that it processes (or at least very large ones - 800 MB in my case). > cut -f 1 test.tsv | wc -l 457030 > gcut -f 1 test.tsv | wc -l 840571 > cut -f 1 test.tsv > temp_cut_1.txt > gcut -f 1 test.tsv > temp_gcut_1.txt > diff temp_cut_1.txt temp_gcut_1.txt | grep '[<]' | wc -l 0 My question is what the hell is going on with Solaris cut? My solution is updating my scripts to use gcut but... what the hell?

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  • Migrating from CVS to Mercurial - how to handle cross-repo symbolic links?

    - by NVRAM
    I have a project that is stored in CVS as numerous modules/repositories. In several of the modules the CVS tree has symbolic links to the files in another tree. For example, the internal support tools have links to binary files (DLL, EXE) that are created and stored in the C# module. In all cases, the files are modified only in in the module where the files exist and are treated as read-only in the tree where the symbolic link exists. More often than not, the files are pulled to machines running MSWindows so the use of symbolic links on the developer machine is not an option. My question is this: Is there a mechanism in Mercurial that can provide the same capabilities?

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  • Load balancing and scheduling algorithms.

    - by Lukas Šalkauskas
    Hello there, so here is my problem: I have several different configuarion servers. I have different calculations (jobs); I can predict how long approximately each job will take to be caclulated. Also, I have priorities. My question is how to keep all machines loaded 99-100% and schedule the jobs in the best way. Each machine can do several calculations at a time. Jobs are pushed to the machine. The central machine knows the current load of each machine. Also, I would like to to assign some kind of machine learning here, because I will know statistics of each job (started, finished, cpu load etc.). How can I distribute jobs (calculations) in the best possible way, keeping in mind the priorities? Any suggestions, ideas, or algorithms ? FYI: My platform .NET.

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  • How do I enumerate installed OleDb providers for current processor architecture?

    - by Rowland Shaw
    I've a project that connects to a dBase format database file, that I've always done in the past with a connection string of the form of: PROVIDER=Microsoft.Jet.OLEDB.4.0;Data Source=MyData.dbf;Extended Properties=dBASE 5.0 I've had to revisit this recently, and have found that when attempting to create an OleDbConnection with that connection string on x64 machines, that have an x86 install of Office on it, it throws an exception. A quick hack of a fix shows that forcing the application to target x86 only makes it work, but I was hoping to be able to tidy this up and check in advance whether it would fail to create the connection, so that I could customise my import options to suit the available providers. Is it possible to enumerate the available data providers for the current processor architecture? (other than relying on catching the exception -- after all, the Framework Design Guidelines suggest that you should only throw in exceptional circumstances, and you have a method to check if something would throw an exception)

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  • While in CMD shell, copying files from host OS to guest VM locks files (VMware Player/Workstation)

    - by Malcolm
    We're running the latest versions of VMWare Player and Workstation for Windows. The following behavior is identical across both products. Problem: We open a CMD prompt in our guest OS (XP, Vista, Windows 7) and copy files from our host OS using the standard CMD shell copy command: copy z:\C$\testfiles The copy completes successfully, but from that point forward, all the files that were copied to our guest OS are now LOCKED on our host OS. This does not happen if we use Windows Explorer to copy files - it only happens when files are copied via the CMD shell. As mentioned at the start of this question, this behavior is reproducible in both VMWare Player and VMWare Workstation across multiple machines and multiple guest OS's. I've googled for a workaround, but without success. Any ideas appreciated. Malcolm

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  • Access sql server without directly permission in domain from ASP.NET

    - by Yongwei Xing
    Hi all Here is the situation. All the machines and users are in the same domain.We are in a domain enviroment. There are some sql server 2005/2008 storing data. There is a ASP.NET site in the domain using the Window Authentication. Now, we need read the data from the sql server and display them using SqlDataSource and GridView. But most of users do not have the direct permission to access the database. Is there any solution to get the data from database and display them on the site without granting users permission? Best Regards,

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  • What encoding to use for exporting to CSV?

    - by Michael Borgwardt
    I'm developing a java app that exports data to CSV files, intended to be opened in Excel by end users. We just noticed that the export function uses Java's platform default encoding. This causes umlaut characters to be lost and unit test to fail on the build server (which is configured to have US-ASCII as its platform default encoding exactly to catch such potential problems). The question is: which would be the best encoding to use? How does Excel determine what encoding to use? Does it use something platform-specific that presumably matches Java's platform default? I'm currently leaning towards hardcoding Cp1252 - that should cover the target machines (the deployment environment is actually specified) and would fix the test problem. From googling around, Excel does not seem to handle UTF-8 well, so that's out, and sticking to the platform default encoding would require some sort of workaround hack for the tests.

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  • C++ Thread Safe Integer

    - by Paul Ridgway
    Hello everyone, I have currently created a C++ class for a thread safe integer which simply stores an integer privately and has public get a set functions which use a boost::mutex to ensure that only one change at a time can be applied to the integer. Is this the most efficient way to do it, I have been informed that mutexes are quite resource intensive? The class is used a lot, very rapidly so it could well be a bottleneck... Googleing C++ Thread Safe Integer returns unclear views and oppinions on the thread safety of integer operations on different architectures. Some say that a 32bit int on a 32bit arch is safe, but 64 on 32 isn't due to 'alignment' Others say it is compiler/OS specific (which I don't doubt). I am using Ubuntu 9.10 on 32 bit machines, some have dual cores and so threads may be executed simultaneously on different cores in some cases and I am using GCC 4.4's g++ compiler. Thanks in advance...

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  • Custom Error mode in Web.Config File

    - by Zerotoinfinite
    Hi All, I have deployed my application on server and Now I am getting this error: To enable the details of this specific error message to be viewable on remote machines, please create a tag within a "web.config" configuration file located in the root directory of the current web application. This tag should then have its "mode" attribute set to "Off". Notes: The current error page you are seeing can be replaced by a custom error page by modifying the "defaultRedirect" attribute of the application's configuration tag to point to a custom error page URL. ~~~ I have defined custom error pages for my applicatio. Please help me, how to rectify this issue. Thanks in advance.

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  • Measure CPU performance via JS

    - by Nicholas Kyriakides
    A webapp has as a central component a relatively heavy algorithm that handles geometric operations. There are 2 solutions to make the whole thing accessible from both high-end machines and relatively slower mobile devices. I will use RPC's if i detect that the user machine is ''slow'' or else if i detect that the user machine can handle it OK, then i provide to the webapp the script to handle it client side. Now what would be a reliable way to detect the speed of the user machine? I was thinking of providing a sample script as a test when the page loads and detect the time it took to execute that. Any ideas?

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  • Mercurial: How to ignore changes to a tracked file

    - by Svish
    I have a file with database settings in my project which I have set to some defaults. The file is tracked by mercurial and checked in. Since this file will be edited with different values various developer machines, is there a way I can tell Mercurial to ignore new changes to this file? I tried adding the file to the .hgignore file, but since the file is tracked it isn't ignored. This is alright and good in other situations, but I am wondering if there is something I can do here.

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  • 505 (HTTP version not supported) sent to client when ASP.NET application attempts to access WCF service

    - by Aaron J Spetner
    We have created a DLL to facilitate access of a 3rd-party WCF Service. This DLL works fine in a Windows Application on our test machines, but when we try to use it in an ASP.NET application on our web server, our web server returns a 505 HTTP version not supported error to the client. To clarify, the setup is Client-Server-WCF Service. Using Fiddler, I can tell that our server is not making requests to the WCF Service. The calls are wrapped in a try/catch block, but no Exception occurs. Instead, as soon as the call to the service is attempted, our server returns a 505 error to the client and terminates execution. We are using clientCertificate authentication over HTTPS with serviceCertificate certificateValidationMode set to "None". Thanks

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  • What is Visual C++ 2005 Service Pack 1 Redistributable Package for?

    - by Stan
    I am using Poco library and when running my program on other machines which don't have VS2005 installed, I have to install "Microsoft Visual C++ 2005 Service Pack 1 Redistributable Package ATL Security Update", otherwise the the program will give error when launching. What is this redistributable package for? Is there any way to avoid installing this but still let my program running well? Also, there're so many vcredist_x86.exe out there. How can I know which one is necessary or not when getting error? Thanks.

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  • Disabling security warning caused by BaseIntermediateOutputPath?

    - by Chris R. Donnelly
    Hi all, Our team overrides BaseIntermediateOutputPath (and other related properties) in our Visual Studio projects in order to have build artifacts go outside the main tree. However, this causes an annoying warning dialog to appear when you open a project for the first time in a new location (which happens on new machines, when you check out a branch to a new location, have to delete corrupted .suo/.user files, etc.). Is there any way to disable the warning? FYI, we are using Visual Studio 2008, and we have encountered this warning on Windows XP as well as Windows 7, so it is not UAC-related.

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  • Ruby gems in lib - spare tire principle

    - by fregas
    Hi, I'm working on a console ruby application (not rails!) I will be installing this application on several machines. I was wondering if there is a way i can build it so i dont have to install the games i'm using for the app on each machine. I'd like to be able to just copy the directory to each machine and run it. Ideally, i'd like to put the gems in the lib folder or something and reference them from there, so i don't have to even install them on my dev machine. Is there a way to do this? In .net, we call this the "spare tire" principle. thanks, Craig

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  • 128bit hash comparison with SSE

    - by fokenrute
    Hi, In my current project, I have to compare 128bit values (actually md5 hashes) and I thought it would be possible to accelerate the comparison by using SSE instructions. My problem is that I can't manage to find good documentation on SSE instructions; I'm searching for a 128bit integer comparison instruction that let me know if one hash is larger, smaller or equal to another. Does such an instruction exists? PS: The targeted machines are x86_64 servers with SSE2 instructions; I'm also interested in a NEON instruction for the same job.

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  • What are some good ways to do intermachine locking?

    - by mike
    Our server cluster consists of 20 machines, each with 10 pids of 5 threads. We'd like some way to prevent any two threads, in any pid, on any machine, from modifying the same object at the same time. Our code's written in Python and runs on Linux, if that helps narrow things down. Also, it's a pretty rare case that two such threads want to do this, so we'd prefer something that optimizes the "only one thread needs this object" case to be really fast, even if it means that the "one thread has locked this object and another one needs it" case isn't great. What are some of the best practices?

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  • Is there a limit to the number of DataContracts that can be used by a WCF Service?

    - by Chris
    Using WCF3.5SP1, VS2008. Building a WCF service that exposes about 10 service methods. We have defined about 40 [DataContract] types that are used by the service. We now experience that adding an additional [DataContract] type to the project (in the same namespace as the other existing types) does not get properly exposed. The new type is not in the XSD schemas generated with the WSDL. We have gone so far as to copy and rename an existing (and working) type, but it too is not present in the generated WSDL/XSD. We've tried this on two different developer machines, same problem. Is there a limit to the number of types that can exposed as [DataContract] for a Service? per Namespace?

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  • Stop debug stalling in eclipse

    - by Lumpy
    I recently installed eclipse on my Mac pro. I had previously been using eclipse on my mac book. When I run an app engine project on the mac book, it works fine. When I run it on my mac pro it brings me into the debugger where I have to click resume a few times but then everything works well again. I went looking into the debug settings and many other settings pages but everything looks the same. I don't remember making any changes to my mac book settings. The code is an exact copy on both machines. What am I missing here? What settings do I need to change.

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  • Launch x64 Windows application in C# while the project is set to x86

    - by daydr3am3r
    Hi all I'm trying to launch the osk.exe and I keep getting "Could not start osk" message. The problem is that my project is set to x86 (i'm using a ms access database). If I switch to x64 or Any CPU everything works fine but the database will no longer work. I tried this using System.Diagnostics; private void btnOSK_Click(object sender, EventArgs e) { Process.Start("osk.exe"); Process.Start(@"C:\windows\system32\osk.exe"); } I also tried to run SysWOWW\osk but this also didn't work. Besides my application should run on both x86 and x64 machines. Is there any way to bypass this? It's really frustrating.

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  • How can I know if a computer supports hardware-assisted virtualization before I purchase the computer?

    - by Poaters
    I'm an iPhone programmer who is no longer in possession of a personal Mac computer on which to use XCode. I have two Windows desktops, and I would like to run OS X in VMWare rather than purchase Apple's expensive hardware. However, neither of my machines supports hardware-assisted virtualization, which is required to virtualize OS X. I went shopping online for a computer today, since I've been planning to purchase a laptop anyway, but sites like Best Buy don't appear to give any indication of whether or not a product supports this. Is there any other site out there or some trick to figuring this out other than buying the machine and running Microsoft's nifty little detection tool?

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  • SQL Server database synchronization issues

    - by George2
    Hello everyone, I have two SQL Server 2008 Enterprise databases (on two machines), and one of the databases is master database and another database is slave database (master database is read/write, slave database is readonly). I want to have daily update from master database to slave database (i.e. new data inserted/updated/deleted in master database could be synchronized to slave database daily or manually controlled). I only need to sync several tables of the databases, not all of the database. Any solutions or documents? thanks in advance, George

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  • Fresh XP +click once +cannot connect

    - by niao
    Greetings, we have to following problem. Our application is deployed using ClickOnce. Everything is running fine and application is able to connect to the wcf service. The problem occurs when application is installed on FRESH XP machine without .net Framework and Windows Installater (that were selected in ClickOnce prerequities). Application downloads .NET Framework 3.5SP1 and windows installer but then it cannot connect the the server. Reboot after install does not help. The strange is that this application has been installed on 10 xp machines and 4 of them can connect to the service without a problem

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  • Windows Workflow runs very slowlyh on my DEV machine

    - by Joon
    I am developing an app using WF hosted in IIS as WCF services as a business layer. This runs quickly on any machine running Windows Server 2008 R2, but very slowly on our dev machines, running Windows XP SP3. Yesterday, the workflows were as fast on my dev machine as they are on the server for the whole day. Today, they are back to running slowly again (I rebooted overnight) Has anyone else experienced this problem with workflows running slowly on IIS in XP? What did you do to fix it?

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  • Running sites on "localhost" is extremeley slow.

    - by seanxe
    Hello all, Having real trouble using my local host to test sites. It runs extremely slow! Sometimes up to a minute to load a page. I'm using firefox and the sites i'm testing run fine on other developers in my office local machines/ on the production server. I've gone through the normal things :- Disabled IPv6 Not running in debug mood Put the site in the highest app pool (High Isolated) on IIS 6. Taking of firewalls etc. The problem only seems to occur when hitting pages which contain some form of .net code in the code-behind. Appreciate that this a little bit of a vague topic / stab in the dark but would appreciate any sort of advice - it's horrible waiting a minute each refresh to try out a change! Cheers, Sean.

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