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• Experience with Intel X25-M 160GB and Oracle

  - by derobert

  We're considering building an Oracle database with 12 Intel X25-M G2 160GB drives in software RAID10. It'd be running Linux. Database gets some very heavy write activity during the early morning data load, other than that it is mostly read-only (and the read load is fairly minimal). We're currently running on 11 150GB Velociraptors (also Linux software RAID10), and are hoping the X25-M will speed up the data load. We currently have redo on different disks than the rest of the data. I'm wondering a few things: Any experience with using X25-M drives for databases? The X25-E are unfortunately beyond our budget. Would it hurt to separate redo off to some magnetic (non-SSD) drives, say 2 (raid1) or 4 (raid10) Seagate Constellations?

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• NullReferenceException at Microsoft.Silverlight.Build.Tasks.CompileXaml.LoadAssemblies(ITaskItem[] R

  - by Eugene Larchick

  Hi, I updated my Visual Studio 2010 to the version 10.0.30319.1 RTM Rel and start getting the following exception during the build: System.NullReferenceException: Object reference not set to an instance of an object. at Microsoft.Silverlight.Build.Tasks.CompileXaml.LoadAssemblies(ITaskItem[] ReferenceAssemblies) at Microsoft.Silverlight.Build.Tasks.CompileXaml.get_GetXamlSchemaContext() at Microsoft.Silverlight.Build.Tasks.CompileXaml.GenerateCode(ITaskItem item, Boolean isApplication) at Microsoft.Silverlight.Build.Tasks.CompileXaml.Execute() at Bohr.Silverlight.BuildTasks.BohrCompileXaml.Execute() The code of BohrCompileXaml.Execute is the following: public override bool Execute() { List<TaskItem> pages = new List<TaskItem>(); foreach (ITaskItem item in SilverlightPages) { string newFileName = getGeneratedName(item.ItemSpec); String content = File.ReadAllText(item.ItemSpec); String parentClassName = getParentClassName(content); if (null != parentClassName) { content = content.Replace("<UserControl", "<" + parentClassName); content = content.Replace("</UserControl>", "</" + parentClassName + ">"); content = content.Replace("bohr:ParentClass=\"" + parentClassName + "\"", ""); } File.WriteAllText(newFileName, content); pages.Add(new TaskItem(newFileName)); } if (null != SilverlightApplications) { foreach (ITaskItem item in SilverlightApplications) { Log.LogMessage(MessageImportance.High, "Application: " + item.ToString()); } } foreach (ITaskItem item in pages) { Log.LogMessage(MessageImportance.High, "newPage: " + item.ToString()); } CompileXaml xamlCompiler = new CompileXaml(); xamlCompiler.AssemblyName = AssemblyName; xamlCompiler.Language = Language; xamlCompiler.LanguageSourceExtension = LanguageSourceExtension; xamlCompiler.OutputPath = OutputPath; xamlCompiler.ProjectPath = ProjectPath; xamlCompiler.RootNamespace = RootNamespace; xamlCompiler.SilverlightApplications = SilverlightApplications; xamlCompiler.SilverlightPages = pages.ToArray(); xamlCompiler.TargetFrameworkDirectory = TargetFrameworkDirectory; xamlCompiler.TargetFrameworkSDKDirectory = TargetFrameworkSDKDirectory; xamlCompiler.BuildEngine = BuildEngine; bool result = xamlCompiler.Execute(); // HERE we got the error! And the definition of the task: <BohrCompileXaml LanguageSourceExtension="$(DefaultLanguageSourceExtension)" Language="$(Language)" SilverlightPages="@(Page)" SilverlightApplications="@(ApplicationDefinition)" ProjectPath="$(MSBuildProjectFullPath)" RootNamespace="$(RootNamespace)" AssemblyName="$(AssemblyName)" OutputPath="$(IntermediateOutputPath)" TargetFrameworkDirectory="$(TargetFrameworkDirectory)" TargetFrameworkSDKDirectory="$(TargetFrameworkSDKDirectory)" > <Output ItemName="Compile" TaskParameter="GeneratedCodeFiles" /> <!-- Add to the list list of files written. It is used in Microsoft.Common.Targets to clean up for a next clean build --> <Output ItemName="FileWrites" TaskParameter="WrittenFiles" /> <Output ItemName="_GeneratedCodeFiles" TaskParameter="GeneratedCodeFiles" /> </BohrCompileXaml> What can be the reason? And how can I get more info what's happening inside CompileXaml class?

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• criticle join query mysql

  - by Bharanikumar

  i have table country and having country name and country code, i have customer table having countomer mobile number like customer_mobile field values like 0044-123456798 , 0024-582654753 , 012-52686145 , i want to populate my country oce into combo, that country name should in customer table which country code count is high that country name should come in the dropdown list top , How to write the join query... Thanks

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• Zoomed PyGTK image without scale pixbuf

  - by mkotechno

  I want to display a gtk.Image with a high level of zoom, but scale the image to a new pixbuf with the pixfuf methods waste a lot of memory and processor. Are there some simply way to display a zoomed image?

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• Site's performance slows over time until Apache is restarted

  - by udbhav

  I'm running a Django app w/ Nginx and Apache. All our static media is stored on S3, and basically it takes a while for the app to check if thumbnails have been created every time a page is loaded. To alleviate this problem, I'm caching the output of the templates w/ memcached. Over the course of an hour or two, the site's speed goes down significantly, until I restart apache, and then all is good for a little while. I have very little sysadmin experience, and was hoping somebody could at least point me in the right direction.

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• What to use to wait on a indeterminate number of tasks?

  - by Scott Chamberlain

  I am still fairly new to parallel computing so I am not too sure which tool to use for the job. I have a System.Threading.Tasks.Task that needs to wait for n number number of tasks to finish before starting. The tricky part is some of its dependencies may start after this task starts (You are guaranteed to never hit 0 dependent tasks until they are all done). Here is kind of what is happening Parent thread creates somewhere between 1 and (NUMBER_OF_CPU_CORES - 1) tasks. Parent thread creates task to be run when all of the worker tasks are finished. Parent thread creates a monitoring thread Monitoring thread may kill a worker task or spawn a new task depending on load. I can figure out everything up to step 4. How do I get the task from step 2 to wait to run until any new worker threads created in step 4 finish?

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• How Lenovo x200(x61) tablet is so great for programming? whats up with so low GHz processors for deb

  - by Piddubetskyy

  for best laptop for programming after reading here looks like its Mac vs Lenovo (tablet, because tablet is only why I would choose it over Mac). I do crave that tablet but low speed processor scares me. Intel Core i5 or i7 in Sony Vaio sounds more attractive (2,26 - 3GHz for lower price). Yes, Lenovo can be fast, like x201, but with good specifications its over $2,000 its a little too much. For a lot of development I just don't want to wait every time while program compiles and builds during debugging. I want it fairly fast and smooth. Can anyone advice their experience with Lenovo's tablets?

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• My laptop keeps hard resetting

  - by cgoddard

  I have had this laptop for a long time (five years at least) and it hasn't had the best treatment over the years. But over the last few months, it has been randomly completely shutting down, no blue screening, no steady shutdown, just black screen, then BIOS. I think it might be happening as I do a save, but cant be sure, but recently it has been getting very annoying. I did initially think it was an overheating issue, but the speed that it comes back online is staggeringly fast for it to have cooled down sufficiently. plus it has got incredibly hot before with no issue (since its been doing this). Does anyone know what might be going on? Dell Inspiron 640m, running Windows 7.

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• Why are mainframes still around?

  - by ThaDon

  It's a question you've probably asked or been asked several times. What's so great about Mainframes? The answer you've probably been given is "they are fast" "normal computers can't process as many 'transactions' per second as they do". Jeese, I mean it's not like Google is running a bunch of Mainframes and look how many transactions/sec they do! The question here really is "why?". When I ask this question to the mainframe devs I know, they can't answer, they simply restate "It's fast". With the advent of Cloud Computing, I can't imagine mainframes being able to compete both cost-wise and mindshare-wise (aren't all the Cobol devs going to retire at some point, or will offshore just pickup the slack?). And yet, I know a few companies that still pump out net-new Cobol/Mainframe apps, even for things we could do easily in say .NET and Java. Anyone have a real good answer as to why "The Mainframe is faster", or can point me to some good articles relating to the topic?

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• Css For Gridview paging

  - by arunendra

  Hi My question is, can I control the style of the paging element separately of top and bottom, I have set the paging to appear in both top and bottom of the gridview, and I want to see that the top pagination is little high up in the page, to do that I used the cssClass and set margin-top:20px and made the position: absolute, this does change the position of the top paging area and set it rightly for me, but the bottom pagination has also come up as a result and now sits inside the grid data!! Is there any way to solve this? Thanks and regards Arunendra

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• How to load MS Word document in C# (.NET)?

  - by Skuta

  Hi, How do I load MS Word document (.doc and .docx) to memory (variable) without doing this?: wordApp.Documents.Open I don't want to open MS Word, I just want that text inside. You gave me answer for DOCX, but what about DOC? I want free and high performance solution - not to open 12.000 instances of Word to process all of them. :( Aspose is commercial product, and 900$ is a way too much for what I do.

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• (Windows 7) Dial Up Connection Locks up the Networking Service

  - by Nick

  I connect to the internet by using my cell phone as a dial up modem. (shh, don't tell my service provider) The connection is usually seamless and the speed is good (150kbps) but occasionally, the connection will get terminated by either the phone or the network, I'm not sure which and then Windows7 stubbornly doesn't acknowledge that the connection is dead so I can re-dial. I have tried to manually kill the connection, but then anything related to the network service refuses to open and the connection is still there. No "Network and Sharing Center", "Network Devices" and often the tray menu will refuse to pop open. The only way I have found to clear the problem is a full restart which. Logging off doesn't work and I haven't been able to find the service that is frozen. If anyone knows how to fix this or prevent this from happening or even how to go about troubleshooting I would be very grateful. ps. This problem is non-existant when tethering in linux on the same machine. (Ubunutu 9 and JoliOS)

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• How much visitors could handle my server ?

  - by coolboycsaba

  I have a website, and I want to host it on my own computer, but I'm wondering if it's good enough. The website check`s if the user is logged in and then displays 15 items (title, description) from a mysql database and the rating (stored in another database) and the comments (another database) for each item. It also displays some stats (number of items, comments). I also have an image for each item. My specs are: AMD Athlon 64 X2 Dual Core Processor 5600+ 2.90 GHz RAM memory: 4.00GB Windows 7 64bit So what do you think, how much visitors and items could it handle (at once or daily) ? My internet connection is good, around 7-10 mb upload and same download speed

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• Switching from PHP to Ruby - is it the answer to performance?

  - by Industrial

  Hi everyone, I get more often the answer, when asking performance related stuff regarding PHP applications, that PHP really isn't the language for high-performance applications, and that a compiled language really is the way to go. The only thing holding me back to PHP is that it's what I have learned to work with for some while now and the development is quite rapid. So, is PHP a thing of the past and should be put aside in web applications in favour of Ruby, for instance? Thanks

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• How to remove the pause during JBoss 5.1.0 GA boot between ProfileServiceBootstrap and AnnotationCreator?

  - by rrc7cz

  I've managed to strip down my JBoss profile enough that it boots in 1.5 minutes. I started with the web profile and started pulling out stuff I didn't need. The bulk of my boot time can be seen here: ... 15:21:51,890 INFO [ProfileServiceBootstrap] Loading profile: ProfileKey@86d597[domain=default, server=default, name=np] 15:22:55,406 WARN [AnnotationCreator] No ClassLoader provided, using TCCL: org.jboss.managed.api.annotation.ManagementComponent 15:22:55,578 WARN [AnnotationCreator] No ClassLoader provided, using TCCL: org.jboss.managed.api.annotation.ManagementComponent ... Does anyone have any idea what JBoss is doing here for 1 minute? If so, is there any way to speed it up or skip it entirely? This is for developer instances, so boot time is quite important.

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• Outputcache - how to determine optimal value for duration?

  - by Steve

  I read somewhere that for a high traffic site (I guess that is a murky term as well), 30 - 60 seconds is a good value. Obviously I could do a load test and vary the values, but I couldn't find any kind of documentation on this. Most samples have a minute, a couple of minutes. There's no recommended range. Is there something on msdn or anywhere that talks about this?

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• Is is better to combine Apache for file manipulation and upload and Nginx for static file serving, or to use one of the two alone

  - by user1032393

  Based on my research, I've read that nginx is best and ideal for serving up static files and images. My application depends heavily on uploading of images and rewriting them, then serving them up. Given that I only have one VPS currently, it has been suggested that I use nginx to serve up the images and website, and reverse proxy to Apache (on the same VPS) to rewrite files with image magick and handle the file uploads. Which would be the best solution, Apache, Nginx, or Apache + Nginx? In terms of best solution, I'm looking at minimal average RAM consumption, while maintaining decent load speed of maybe sub 2 seconds?

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• How I can view and block specific applications temporarily from accessing Internet?

  - by Curious Apprentice

  I don't want to block any application permanently from accessing internet. I just want to block some specific applications for a particular time period to gain speed in running some other. I know about one such great tool - that is "Comodo firewall". It can smoothly block and accurately display apps accessing internet. The only problem of installing this is, Windows recommends only one firewall apps and as Im running Windows 7 x64 Ultimate there will be complications if I install this one. I need a tool which can accurately display which apps are accessing internet (through which port) and how much data they are receiving or sending. I also need some arrangement within the app so that I can easily temporarily block that app from accessing internet.

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• Best way to copy large amount of data between partitions

  - by skinp

  I'm looking to transfer data across 2 lv of an HP-UX server. I have a couple of those transfers to do, some of which are mostly binary (Oracle tablespace...) and some others are more text files (logs...). Used data size of the volumes is between 100Gb and 1Tb. Also, I will be changing the block size from 1K to 8K on some of these partitions... Things I'm looking for: Guarantees data integrity Fastest data transfer speed Keeps file ownership and permissions Right now, I've thought about dd, cp and rsync, but I'm not sure on the best one to use and the best way to use them...

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• why no += operator for vectors in stl

  - by Akshay Bhat

  I am curious? What high fundu logic goes behind not implementing: result+=vector1; where both result and vector1 are stl vectors. Note: i know how to implement that bit, but i need to know what logic, the sages who designed STL were using when they chose not to implement this feature?

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• Google Visualization Spacing

  - by Mike

  I have a chart similar to the one below using the Google Visualization API. My problem is that on the right side of where the key is for this chart(where it says low, medium, high) there is too much white space. How can I get rid of this white space?

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• Tool to create unscaled call-out from a thumbnail image?

  - by Mal Ross

  I'm creating an online tutorial for some software and need to include screenshots. In particular, I want to highlight the position and appearance of a given control in a large screen. Given that I haven't got the space to show the screen at full resolution (at least, not alongside the tutorial text), I figured I would use a kind of call-out from a thumbnail. Here's my poor first effort, made in Paint.NET: Given how long this took me to craft, I'd really like to find a tool to speed things up (and make them look a little more professional!). Preferably a free one, too - or one that has a downloadable trial. The exact style it produces isn't that important, provided it achieves the desired effect. Can anyone help me out? Thanks, Mal. P.S. I'm using Windows Vista.

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• Slow network file copy on Windows 7

  - by Jason V.

  I wrote a program that uses xcopy to transfer files (usually between 1KB and 2MB) over our intranet. Usually, I am copying files from my host machine (Windows 7 x64) to a VMWare virtual machine running Windows Server 2008 (the VM is running on my host machine, if that matters). On Windows XP, the file transfers usually only require a few seconds to complete. But on my Windows 7 machine, the transfer of the first file (1.5 MB) takes around 1.5 minutes to complete. This is true whether I use xcopy, robocopy, or programmatically using File.Copy(). I noticed that if I use File.Copy, the first transfer is very slow and subsequent transfers are much faster. Any clue how I can speed up the process? Is there a setting in Windows 7 (or server 2008) that I could try?

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• Blind Injection [closed]

  - by Ajay

  Blind SQL Injection Severity: High Test Type: Application Vulnerable URL: Remediation Tasks: Filter out hazardous characters from user input Variant 1 of 2 [ID=12654] The following changes were applied to the original request: • Set parameter 'nm's value to 'Demography'%20and%20'foobar'='foobar'

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• Open source projects with good quality tests

  - by dotnetdev

  Hi, I know there is a thread about open source projects with good code quality, but which projects have unit tests (With mocking) and are of a high quality? Many Thanks

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