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Articles indexed in April 2010

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  • MySQL Exotic Storage Engines

    <b>Database Journal:</b> "MySQL has an interesting architecture that sets it apart from some other enterprise database systems. It allows you to plug in different modules to handle storage. What that means to end users is that it is quite flexible, offering an interesting array of different storage engines with different features, strengths, and tradeoffs."

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  • Vermont.NET Meeting Monday April 12th Our Own Visual Studio 2010 Launch

    RSVP http://vtdotnet.eventbrite.com/ The Official Visual Studio 2010 Launch is April 12th in Las Vegas The UnOfficial Visual Studio Launch is April 12th in Burlington! Vermont.NET April Meeting_____________________________ Where: G.E. Healthcare in South Burlington When: Monday April 12th, 6-8:30pm Speakers: Various Members of the Vermont .NET Community Topic: These are a Few of Our Favorite Things in VS2010 and .NET 4.0 While Visual Studio 2010 officially launches *today* (April 12th),...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Poll: What Are Your Favorite Silverlight TV Episodes?

    Its been 3 months since Silverlight TV first aired in mid January. Weve aired a variety of topics (from design centric to hardcore developer code to awesome demos) and a variety of guests (who can forget Ward Bell is his white fur jacket?). So far, our audience has watched our episodes for well over 600,000 views! Thank you! As we revisit the lineup and start scheduling the next series of shows, Id like to do a quick poll on what your favorite 3 episodes have been. So please click on this link...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Linux not picking up new partition correctly on emc pseudo device

    - by James
    Hi We have a database server running oracle rac. We were recently running out of space on the main LUN that it is attached to. I created a new 100GB LUN and concatenated this onto the existing LUN creating a new MetaLUN. After some messing I managed to get linux to recognise the new space. I then created a new partition in on the pseudo device, to use the new space. Previously when I have done this on other system the next step is to create an ASM disk on the new partition and add this disk to the oracle disk group. This however fails. I am aware of various issues with ASM and powerpath, but I don't think this is the issue here. As on while investigating the issue I discovered that one of the underlying logical device is not reflecting the size change. See below; Powermt displays all of the underlying logical units [root@XXXXX~]# powermt display dev=emcpowerd Pseudo name=emcpowerd CLARiiON ID=CKM00091500009 [VFRAC2] Logical device ID=6006016030312200787502866C65DE11 [LUN 30] state=alive; policy=CLAROpt; priority=0; queued-IOs=0 Owner: default=SP A, current=SP A Array failover mode: 1 ============================================================================== ---------------- Host --------------- - Stor - -- I/O Path - -- Stats --- ### HW Path I/O Paths Interf. Mode State Q-IOs Errors ============================================================================== 3 qla2xxx sde SP A0 active alive 0 0 3 qla2xxx sdj SP B0 active alive 0 0 4 qla2xxx sdo SP A1 active alive 0 0 4 qla2xxx sdt SP B1 active alive 0 0 Fdisk on the pseudo device shows correct space. [root@XXXXX ~]# fdisk -l /dev/emcpowerd Disk /dev/emcpowerd: 429.4 GB, 429496729600 bytes 255 heads, 63 sectors/track, 52216 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/emcpowerd1 1 39162 314568733+ 83 Linux /dev/emcpowerd2 39163 52216 104856255 83 Linux fdisk on one of the logical units is wrong [root@XXXXX~]# fdisk -l /dev/sde Disk /dev/sde: 322.1 GB, 322122547200 bytes 255 heads, 63 sectors/track, 39162 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/sde1 1 39162 314568733+ 83 Linux /dev/sde2 39163 52216 104856255 83 Linux fdisk on the rest of the units is fine [root@XXXXX ~]# fdisk -l /dev/sdj Disk /dev/sdj: 429.4 GB, 429496729600 bytes 255 heads, 63 sectors/track, 52216 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/sdj1 1 39162 314568733+ 83 Linux /dev/sdj2 39163 52216 104856255 83 Linux Also when I created the the partition linux did not create the any entries in the /dev directory for the second partition so I created these manually [root@XXXXX dev]# mknod sde2 b 8 66 [root@XXXXX dev]# ls -al sd[ejot]? brw-r----- 1 root disk 8, 65 Dec 29 14:20 sde1 brw-r--r-- 1 root disk 8, 66 Apr 8 20:31 sde2 brw-r----- 1 root disk 8, 145 Dec 29 14:19 sdj1 brw-r--r-- 1 root disk 8, 146 Apr 8 20:33 sdj2 brw-r----- 1 root disk 8, 225 Apr 6 23:12 sdo1 brw-r--r-- 1 root disk 8, 226 Apr 8 20:33 sdo2 brw-r----- 1 root disk 65, 49 Dec 29 14:19 sdt1 brw-r--r-- 1 root disk 65, 50 Apr 8 20:33 sdt2 This is a production server that we cannot easily reboot. Any ideas would be much appreciated. J

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  • WEB based HPC cluster node management

    - by Skuja
    Hello, i am working on my school diploma thesis. The main goal is to create web based application where logged users could see free and busy nodes, turn them on and off, see what process they are running etc. Figured out that i could do something like this - write some cron daemon that would run every 30seconds or so, and it could run ping utility for each node to find out if it is on or off, then write results to some file. Then from my web app (i will write in PHP) i could read the info. Will it be a good solution? How would you suggest me to do it? And finally, is there any existing solutions (it may not be a definetly ewb based) for managment of cluster nodes?

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  • Unable to back up SQL Server databases using a maintenance plan

    - by Stephen Jennings
    I am trying to create a maintenance plan that will run automatically and back up my SQL Server 2005 databases automatically. I create a new maintenance plan and add a "Back Up Database Task", select all databases, and choose a path to back up to. When I save and try to execute this plan, I get the following error message: =================================== Execution failed. See the maintenance plan and SQL Server Agent job history logs for details. =================================== Job 'Backup.Subplan_1' failed. (SqlManagerUI) ------------------------------ Program Location: at Microsoft.SqlServer.Management.SqlManagerUI.MaintenancePlanMenu_Run.PerformActions() I've checked the maintenance plan log, the agent log, and just about every log file I can find and there are no entries at all to help me figure out why this is failing. If I right-click on a specific database and select "Back Up", the task succeeds. I tried changing the plan to back up just that one database and it still failed. I've tried running the plan with both Windows authentication and SQL Server authentication with the sa account. I also tried specifically granting the SQL Server Agent user account full privileges on the backup folder, but it still failed. While searching the web for clues, the only solution I've run across so far suggests running sp_configure 'allow_update', 0. I tried this but allow_update was already set to 0 and it did not fix the problem. The Windows server and SQL Server have all updates applied to them. Thanks for any suggestions!

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  • Remotely connecting to a Hyper-V hosted VM's console.

    - by billpg
    Hi everyone. I've just managed to successfully move an aging beige box into a Hyper-V virtual machine. We used to use the beige box by walking over and sitting at the computer itself, but we can't do that so easily when its inside the Hyper-V system. Is there a way please to access the VM's console from a workstation running XP Pro? Please note that its an obscure OS running inside the VM, so installing a VNC or similar service inside the VM is not an option. Many thanks.

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  • NIC firmware version on my DL380 G5

    - by ToastMan
    Hi all, I am trying to figure out what is my current NIC firmware version. If I run the latest firmware upgrade from HP, I get the following: It doesn't tell me the current version. If I try to check it from Device Manager, I get this: That's the driver version, not the hardware firmware version. If I reboot the computer, I don't see the NIC firmware during the POST.. How would I go about finding the current firmware version... Thanks a lot! Toast

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  • Recommended apps for securing/protecting a new desktop machine install?

    - by Eddie Parker
    I'm hoping to harness the collective tips of superuser to gather recommended apps/configurations to keep a new desktop clean, virus free, and hopefully lower software rot. I ask because I've recently come across tools like dropbox, deepfreeze, returnil, etc, and I'm curious what other ones are out there to protect a new box. I personally am interested in Windows, but feel free to comment on whatever OS you'd like, freeware or otherwise. Ideally specify the OS in your answer(s). One answer per program please. Then, rather than duplicate posts, vote for the program if it is already listed. UPDATE: It's been noted that there are other questions similar to this one [1], so I'd ask that these answers focus on security and protection. [1] Related questions: http://superuser.com/questions/1241/what-are-some-must-have-windows-programs http://superuser.com/questions/1191/what-are-some-must-have-mac-os-x-programs http://superuser.com/questions/1430/must-have-linux-software http://superuser.com/questions/3855/must-have-networking-security-tools

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  • Using native resolution on external display results in stretched, out of bounds image

    - by Roni Yaniv
    I have an HP min 311 netbook with Windows XP, which I've connected to a Samsung SyncMaster 2043BW display via the supplied analog cable. The external display's native res is 1680x1050, which the netbook's ION GPU supports. I've configured the external display as the single display (no cloning or any such fancy stuff). However, once I set the native res, the image just stretches out. It looks squashed, and it goes outside the monitor's edges. In contrast, lower resolutions manage to stay within the monitor's display edges, though obviously they are skewed in some way (vertically or horizontally). BTW, the only res which seems to be displayed relatively clearly (it's the least blurry) is 1280x720. I tried looking all over the web for an explanation/advice but could not find any. I already played with the settings on the external display itself several times. So either it's not that, or I missed something. Has someone run into this issue? I need help.

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  • Midnight Commander Woes: Output while panels are active, and tab completion.

    - by Eddie Parker
    I'm trying out midnight commander (loved Norton back in the day!) and I'm finding two things hard to work out. I'm curious if there's ways around this or not however. 1) If the panels are active and I issue a command that has a lot of output, it appears to be lost forever. i.e., if the panels are visible and I cat something (i.e., cat /proc/cpuinfo), that info is gone forever once the panels get redrawn. Is there anyway to see the output? I've tried 'ctrl-o', but it appears to just give me a fresh sub-shell and wipes the previous output away. Pausing after every invocation is a bit irritating, so I'd rather not use that option. 2) Tab completion for commands When mc is running, it consumes the tab character for switching panels. Is there any way to get around this so I can still type in paths and what not on the command line? I'm running cygwin if that matters at all.

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  • JQuery - Adding Cells to Dynamic Tree Table

    - by BPotocki
    I can't quite wrap my head around this one... A table like the one below is spit out by a renderer from some XML. The XML it comes from has a variable depth. (Please point out if I'm using the rowspans in a horrific manner as well, I just came to this table with some experimentation). <table border="1"> <tr> <td rowspan="12">> 1</td> </tr> <tr> <td rowspan="3">1 > 2</td> </tr> <tr> <td>1 > 2 > 5</td> </tr> <tr> <td>1 > 2 > 6</td> </tr> <tr> <td rowspan="3">1 > 3</td> </tr> <tr> <td>1 > 3 > 7</td> </tr> <tr> <td>1 > 3 > 8</td> </tr> <tr> <td rowspan="3">1 > 4</td> </tr> <tr> <td>1 > 4 > 9</td> </tr> <tr> <td>1 > 4 > 10</td> </tr> </table> What I'm trying to accomplish in JQuery is this... User clicks cell "1 2" (which will have an ID). An item is dynamically added to the third level, but UNDER "1 2 6". What I could do is just add another row underneath "1 2" and increase the rowspan from "1 2", but the new cell would then appear out of order amongst "1 2 5" and "1 2 6". I don't really need the exact code to do this, just something to stop my head from spinning around this...Thanks!

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  • Slow page unload in IE

    - by ForYourOwnGood
    I am developing a site which creates many table rows dynamically. The total amount of rows right now is 187. Everything works fine when creating the rows, but in IE when I leave the page, there is a large amount of lag. I do not know if this is some how related to the heavy DOM manipulation I am doing in the page? I do not create any function closures when building the dynamic content's event handlers so I do not believe this problem is related to memory leaks. Any insight is much appreciated.

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  • Tag Cloud Data Backend

    - by Waldron
    I want to be able to generate tag clouds from free text that comes from any number of different sources. For clarity, I'm not talking about how to display a tag cloud once the critical tags/phrases are already discovered, I'm hoping to be able to discover the meaningful phrases themselves... preferable on a PHP/MySQL stack. If I had to do this myself, I'd start by establishing some kind of index for words/phrases that gives a "normal" frequency for any word/phrase. eg "Constantinople" occurs once in every 1,000,000 words on average (normal frequency "0.000001"). Then as I analyze a body of text, I'd find the individual words/phrases (another challenge!), find frequencies of each within the input, and measure against the expected freqeuncy. Words that have the highest ratio against expected frequency get boosted priority in the cloud. I'd like to believe someone else has already done this, WAY better than I could hope to, but I'll be damned if I can find it. Any recommendations??

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  • Redraw balloon tip and tooltip in C#?

    - by Rryk
    I wrote a C# application that is a simple countdown timer. I use it myself to keep track of cooking time (not to forget about boiling pasta) and other purposes. It works in the tray. When hovering the icon it shows remaining time as a tooltip. When clicked it shows remaining time in a balloon tip. I would like displayed time to be "ticking down", i.e. to update every second. How do I force update/redraw of the balloon and tool tip?

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  • using Linq to partition data into arrays

    - by user200295
    I have an array of elements where the element has a Flagged boolean value. 1 flagged 2 not flagged 3 not flagged 4 flagged 5 not flagged 6 not flagged 7 not flagged 8 flagged 9 not flagged I want to break it into arrays based on the flagged indicator output array 1 {1,2,3} array 2 {4,5,6,7} array 3 {8,9}

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  • Is there a more elegant solution than an if-statement with no else clause?

    - by Jay
    In the following code, if Control (the element that trigers Toggle's first OL) is not Visible it should be set Visible and all other Controls (Controls[i]) so be Hidden. .js function Toggle(Control){ var Controls=document.getElementsByTagName("ol",document.getElementById("Quote_App")); var Control=Control.getElementsByTagName("ol")[0]; if(Control.style.visibility!="visible"){ for(var i=0;i<Controls.length;i++){ if(Controls[i]!=Control){ Reveal("hide",20,0.3,Controls[i]); }else{ Reveal("show",20,0.3,Control); }; }; }else{ Reveal("hide",20,0.3,Control); }; }; Although the function [Toggle] works fine, it is actually setting Controls[i] to Hidden even if it is already. This is easily rectified by adding an If statement as in the code below, surely there is a more elegant solution, maybe a complex If condition? .js function Toggle(Control){ var Controls=document.getElementsByTagName("ol",document.getElementById("Quote_App")); var Control=Control.getElementsByTagName("ol")[0]; if(Control.style.visibility!="visible"){ for(var i=0;i<Controls.length;i++){ if(Controls[i]!=Control){ if(Controls[i].style.visibility=="visible"){ Reveal("hide",20,0.3,Controls[i]); }; }else{ Reveal("show",20,0.3,Control); }; }; }else{ Reveal("hide",20,0.3,Control); }; }; Your help is appreciated always.

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  • How to deal with accelerators for disabled controls?

    - by sharptooth
    I have a dialog created from a template. It has controls listed in the template in the following order: some irrelevant controls a label with an accelerator (let's pretend it's Alt-A) an edit box OK and Cancel buttons Normally when I hit Alt-A the keybord focus is transferred to the edit box - just as needed. However I sometimes need to disable to edit box. If I hit Alt-A when the edit box is disabled the effect is that the OK button is pressed and that is definitely not what I want. I would prefer to have no action taken in this case. What could I do to workaround this?

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  • Using the Proxy pattern with C++ iterators

    - by Billy ONeal
    Hello everyone :) I've got a moderately complex iterator written which wraps the FindXFile apis on Win32. (See previous question) In order to avoid the overhead of constructing an object that essentially duplicates the work of the WIN32_FIND_DATAW structure, I have a proxy object which simply acts as a sort of const reference to the single WIN32_FIND_DATAW which is declared inside the noncopyable innards of the iterator. This is great because Clients do not pay for construction of irrelevant information they will probably not use (most of the time people are only interested in file names), and Clients can get at all the information provided by the FindXFile APIs if they need or want this information. This becomes an issue though because there is only ever a single copy of the object's actual data. Therefore, when the iterator is incrememnted, all of the proxies are invalidated (set to whatever the next file pointed to by the iterator is). I'm concerned if this is a major problem, because I can think of a case where the proxy object would not behave as somebody would expect: std::vector<MyIterator::value_type> files; std::copy(MyIterator("Hello"), MyIterator(), std::back_inserter(files)); because the vector contains nothing but a bunch of invalid proxies at that point. Instead, clients need to do something like: std::vector<std::wstring> filesToSearch; std::transform( DirectoryIterator<FilesOnly>(L"C:\\Windows\\*"), DirectoryIterator<FilesOnly>(), std::back_inserter(filesToSearch), std::mem_fun_ref(&DirectoryIterator<FilesOnly>::value_type::GetFullFileName) ); Seeing this, I can see why somebody might dislike what the standard library designers did with std::vector<bool>. I'm still wondering though: is this a reasonable trade off in order to achieve (1) and (2) above? If not, is there any way to still achieve (1) and (2) without the proxy?

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  • A tool to find and fix incomplete source code documentation

    - by Pekka
    I have several finished, older PHP projects with a lot of includes that I would like to document in javadoc/phpDocumentor style. While working through each file manually and being forced to do a code review alongside the documenting would be the best thing, I am, simply out of time constraints, interested in tools to help me automate the task as much as possible. The tool I am thinking about would ideally have the following features: Parse a PHP project tree and tell me where there are undocumented files, classes, and functions/methods (i.e. elements missing the appropriate docblock comment) Provide a method to half-way easily add the missing docblocks by creating the empty structures and, ideally, opening the file in an editor (internal or external I don't care) so I can put in the description. Optional: Automatic recognition of parameter types, return values and such. But that's not really required. The language in question is PHP, though I could imagine that a C/Java tool might be able to handle PHP files after some tweaking. Thanks for your great input!

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  • Custom types as key for a map - C++

    - by Appu
    I am trying to assign a custom type as a key for std::map. Here is the type which I am using as key. struct Foo { Foo(std::string s) : foo_value(s){} bool operator<(const Foo& foo1) { return foo_value < foo1.foo_value; } bool operator>(const Foo& foo1) { return foo_value > foo1.foo_value; } std::string foo_value; }; When used with std::map, I am getting the following error. error C2678: binary '<' : no operator found which takes a left-hand operand of type 'const Foo' (or there is no acceptable conversion) c:\program files\microsoft visual studio 8\vc\include\functional 143 If I change the struct like the below, everything worked. struct Foo { Foo(std::string s) : foo_value(s) {} friend bool operator<(const Foo& foo,const Foo& foo1) { return foo.foo_value < foo1.foo_value; } friend bool operator>(const Foo& foo,const Foo& foo1) { return foo.foo_value > foo1.foo_value; } std::string foo_value; }; Nothing changed except making the operator overloads as friend. I am wondering why my first code is not working? Any thoughts?

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  • Why are button sizes on Eclipse vs Device not the same.

    - by Mike Droid
    O.k....this is weird. I had my buttons looking fine last week, now something has changed. My buttons on the eclipse emulator are much larger than on my device (Droid 2.1). I checked my skin settings, screen size permissions, density factors....what am I missing? My skin is set to WVGA854, but when the app goes to the phone the buttons are smaller!? Text and pictures are fine...looking the same as the emulator...just the buttons are shrunk! Hmm....I know it has to be something simple...:)

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