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Articles indexed Thursday March 25 2010

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  • Running Montavista Linux kernel 2.6.21 on XEN

    - by Josh
    I've been assigned the task of getting our MontaVista Linux (2.6.21 kernel) running on Xen. We'll be running Xen in -hvm- mode. My Xen version is 3.4.0 (linux kernel 2.6.18) and am unable to run MontaVista Linux (kernel 2.6.21) in hvm mode. Does anyone have suggestions?

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  • iSCSI, failover and XenServer

    - by jemmille
    I have an iSCSI fail over implementation setup so if one of my storage units fails the other takes over immediately (it also runs the NFS shares). When fail over occurs, volumes are exported, the IP is switched to the other machine and the targets are reconfigured. The fail over of the storage system itself works just fine. I use NexentaStor for my filer. When I do a test (manual) fail over of my storage the following occurs: Note: I run the admin VM's on NFS and customer based VM's on iSCSI All NFS based VM's remain up and working perfectly through the failover and after All VM 's running on iSCSI eventually report the following: An error about not being able to write to a particular block An error about journaling not working Then the file system goes RO To get the VM's working again I have to do the following: Force shutdown of the "broken" VM's. Detach the iSCSI SR Re-attach the iSCSI SR Boot the VM on a different server (5 in my pool) If I don't boot on a different server I get this error "Internal error: Failure("The VDI <uuid&gt; is already attached in RW mode; it can't be attached in RO mode!")" The only way I have found to fix that error is to reboot the entire server it was running on previously which is obviously a huge pain. Currently multipathing is NOT enabled (but can be and the same thing still occurs). I have edited much of the /etc/iscsid.conf file to work with the timeout settings but to no avail. In short, my storage fails over properly but XenServer does not keep the connection alive. As a thought, the error that shows up in #4 above might be the ultimate cause and fixing that would fix everything? Any help would be appreciated more than you know.

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  • What Wireless Router/ADSL Modem to get? N-band a must!!

    - by JJarava
    I'm looking for a Dual-N band Router OR ADSL Gateway and I'd like some recommendations. Situation: I have a 802.11b/g ADSL gateway provided by my telco, but the WIFI signal won't cover all the house (especially the living-room, so my tv-connected Mac Mini has poor to no internet access). So I'm looking to either replace the DSL modem with a N-enabled one, or to add a Router to the mix. I've had a modem+router setup for many years, and I know the advantatges (double NAT, double FW = more security) and issues (more complex to troubleshoot, two possible points of failure), so I'd rather live with a single (ADSL Gateway) device, if possible. Requirements: Dual-N Band (300 Mbs WIFI) 1 GB Ethernet ports ADSL2+ support (if it's a ADSL gateway, which would be desirable) "Best" range and speed possible Nice to have: USB port to share disks/printers on the network Media streaming I've been a long time user of Linksys, so googling around I found the WRT610N (http://www.linksysbycisco.com/US/en/products/WRT610N) for a "Pure Router" perspective, and it's one of those that Linksys styles "N++" (http://www.linksysbycisco.com/US/en/promo/Promotion-Go-Wireless?stepname=Promotion-Step-Go-Wireless-High-Performance) But I haven't been able to find similar "ADSL" gateways. I've found the WAG320N, but there is little to no info in the Linksys site (i.e., i don't know if it's Dual Band, or if it has GB ethernet) Any opinions/recommendations of other products/suggestions are more than welcome.

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  • WiFi N Gigabit Router

    - by SLaks
    I'm looking for a WiFi N Gigabit router. I'll be using an iPod Touch 2G and a 2009 17" MacBook Pro over WiFi, and I need at least 4 gigabit ethernet ports plus a WAN port. What do people recommend? In particular, are there any compatibility issues between different WiFi N drafts that would limit the speed of the MacBook, and is it worth getting dual-band?

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  • How can I find a laptop if it has a different model name all over the world?

    - by Mike
    CONUNDRUM: A laptop review in the UK talks about how brilliant the "ASUS ABCDE 55" is, but in America, France, etc there is no such laptop name. In fact it's called "ASUS 12345 AB" - AAARRGH! QUESTION: Is there a way of finding out all the diverse names for the same laptop all over the world? Example: if Samsung create a R2D2500, then what is that spec laptop called in all the other countries (if they release it of course). Or if it's not released, what is their similar spec laptop called in the other countries? I understand that specs may be different, but if I read a review on my trusted UK website, but live in say Australia, I want to be able to find the name of the same laptop in Australia and then check out local places to buy it. So if anyone knows if there is a technique, specific website, or even how to use a company website to find out these annoying name changes I'd really appreciate it.

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  • Manchester SQL Server User Group has a new venue

    - by Testas
    Hi All   I am pplease to confirm the manchester user group has a new venue in partnership with BSS BSS, Westminster House, Minshull Street, off Portland Street, Manchester, M1 3HU Dates have been updated for the UG sessions, please take a look  Any questions please email me   Chris

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  • WCF Timeout issue - should there even be a socket connection?

    - by stiank81
    I have a .Net application which is split into a client and server side. The communication between them is handled using WCF. I'm not using the automagic service references, but instead I've built the connection manually like described in the Screencast by Miguel Castro. Summarized this means that I create a console application on the server side that holds ServiceHost objects for the different services: var myServiceHost = new System.ServiceModel.ServiceHost(typeof(MyService), new Uri("net.tcp://localhost:8002")); myServiceHost.Open(); And on the client side I have service proxies creating channels using the ChannelFactory: IMyService proxy = new ChannelFactory<IMyService>("MyServiceEndpoint").CreateChannel(); The client and server side share the service contract defined in the interface IMyService. And another advantage is that I get minimal App.config files - without all the autogenerated stuff created through the Service References. Example from client side: <?xml version="1.0"?> <configuration> <system.serviceModel> <client> <endpoint address="net.tcp://localhost:8002/MyEndpoint" binding="netTcpBinding" contract="IMyService" name="MyServiceEndpoint"/> </client> </system.serviceModel> </configuration> So - to my problem. I create the proxy once, and it holds a channel all the way through the application. However, if I leave the application without use for a few minutes the channel has timed out, and I get the following exception: The socket connection was aborted. This could be caused by an error processing your message or a receive timeout being exceeded by the remote host, or an underlying network resource issue. Local socket timeout was '00:00:59.9979998'. How do I prevent this? I'm assuming I need to specify a higher timeout in my configuration? But I don't want it to ever time out. But on the other hand - I don't want a socket connection! Do I need one? Thought I could go connection less with WCF... What's the permanent solution and best practice on solving this? Set timeout to "never".. Create a new channel for each request? I'm assuming there is some overhead creating the channel?.. Increase the timeout to e.g. 5minutes and create new channel if the connection did timeout? Make it connection less somehow? (Without the overhead of creating channels..) Something else...

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  • Where to get NCover from?

    - by Try
    Hi - I realise NCover has gone commercial. I am looking for teh free version. Where do i get the latest free version of NCover? The NCover website only talks about a trial version of the commercial product, not the free version.

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  • Wrap Sub as Function for use in Lambda

    - by Luhmann
    I have a problem with VB and Moq. I need to call a verify on a Sub. Like so: logger.Verify(Function(x) x.Log, Times.AtLeastOnce) And my logger looks like this: Public Interface ILogger Sub Log() End Interface But with VB this is not possible, because the Log method is a Sub, and thereby does not produce a value. I don't want to change the method to be a function. Whats the cleanest way of working around this limitation and is there any way to wrap the Sub as a Function like the below? logger.Verify(Function(x) ToFunc(AddressOf x.Log)) I have tried this, but i get: Lambda Parameter not in scope

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  • Java UML API/Library

    - by walters
    Is there a Java API/Library that I can use to generate UML diagrams (Class, Sequence and Package)? I want to be able to embed the diagrams within my Java Application.

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  • [C++] Run codes for only 60 times each second.

    - by djzmo
    Hello there, I'm creating a directx application that relies on the system time (because it must be accurate), and I need to run lines of code for 60 times each second in the background (in a thread created by boost::thread). that's equal to 60 FPS (frame per second), but without depending on the main application frame rate. //................. void frameThread() { // I want to run codes inside this loop for *exactly* 60 times in a second. // In other words, every 16.67 (1000/60) milliseconds for(;;) { DoWork(); //......... } } int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd) { initialize(); //.....stuffs boost::thread framethread(frameThread); //...... } Is there a way to do this? Any kind of help would be appreciated :)

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  • Recommend .NET data access layer/middle tier

    - by Simon G
    Hi, I'm currently creating an MVC application that will likely to expand to include a silverlight, wpf and possible windows phone all using the same data. So I've created a class library to keep all my objects in and I've created the MVC app. My question is what would be the best way to access the data? Taking into account possible expansion in the future. Should I use web services/WCF? RIA Services? Remoting? Or something else. What have people used in the past and what do you recommend? Thanks

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  • How can create summary footer on runtime?

    - by Rapunzo
    I use TcxGrid I have create fields on execution time because I have a pivot query and columns are variable I filled my grid like theese codes grdCevapDBTableView2.BeginUpdate; grdCevapDBTableView2.ClearItems; fillGridView(grdCevapDBTableView2,command); grdCevapDBTableView2.DataController.CreateAllItems; grdCevapDBTableView2.EndUpdate; Now I want to get sum values from these columns. How can create summary footer on runtime?

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  • Find earliest and latest dates of specified records from a table using SQL

    - by tonyyeb
    Hi I have a table (in MS SQL 2005) with a selection of dates. I want to be able to apply a WHERE statement to return a group of them and then return which date is the earliest from one column and which one is the latest from another column. Here is an example table: ID StartDate EndDate Person 1 01/03/2010 03/03/2010 Paul 2 12/05/2010 22/05/2010 Steve 3 04/03/2101 08/03/2010 Paul So I want to return all the records where Person = 'Paul'. But return something like (earliest ) StartDate = 01/03/2010 (from record ID 1) and (latest) EndDate = 08/03/2010 (from record ID 3). Thanks in advance

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  • [C#] A problem of downloading webpage's HTML source.

    - by Nam Gi VU
    I use System.Net.WebClient.DownloadString(url) to get the HTML source of http://kqxs.vn but what I recieved is a caution text from the web server which says in Vietnamese as: "Xin loi. Chung toi khong the dap ung yeu cau truy cap cua ban... Vui long lien he : [email protected]. Chao ban" which is translated in English as "Sorry. We cannot response to your request... Please contact... Good bye." This is strange because when I use a WebControl to get the HTML ( by calling .Navigate(url) and then .DocumentText), I receive the different HTML codes - which in turn is exactly what I see when open the website by Firefox & view the source code from Firefox. I read DownloadData() is downloading source that is completely wrong. Source view in Firefox different than that downloaded. - Stack Overflow and found the answer to my symptom. But I don't know how to set the User-Agent. Please help.

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  • How can I execute several maven plugins within a single phase and set their respective execution ord

    - by Yaneeve
    Hi all, I would like to breakup certain phases in the maven life cycle into sub phases. I would like to control the execution flow from one sub-phase to another, sort of like with ant dependencies. For example, I would like to use the NSIS plugin in order to package up my project into an installer at the package stage, AFTER my project had been packaged into a war file. I would like to do all that at the package phase. Is that possible? Thanks

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  • jquery - deciding whether a user is "away"

    - by Phil Jackson
    hi, im doing a little test to check whether the user is "away" (unactive) or not; function away_status(){ $("#away_stat_update").everyTime(1000, function(i) { var number = Number($(this).html()); if( number == 20 ) { // set user as away alert( "user away" ); } if( number > 20 ) { $("*").mousemove(function(e){ $("#away_stat_update").html(0); var number = Number(0); // reset user to being online alert( "user back online" ); }); } $("#away_stat_update").html( number + 1 ); }); $("*").mousemove(function(e){ $("#away_stat_update").html(0); }); } away_status(); the only problem is that when the number is greater than 20 and the mouse is moved it keeps alerting "user back on line" instead of doing it just once. The number is resetting by the way.

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  • Ruby 1.8.7 compatibility

    - by Sebastian
    I had a exception when I switch to Ruby 1.8.7 on Snow Leopard ArgumentError: wrong number of arguments (1 for 0) /Library/Ruby/Gems/1.8/gems/activerecord-1.15.5/lib/active_record/connection_adapters/abstract/quoting.rb:27:in 'to_s' /Library/Ruby/Gems/1.8/gems/activerecord-1.15.5/lib/active_record/connection_adapters/abstract/quoting.rb:27:in 'quote' /Library/Ruby/Gems/1.8/gems/activerecord-1.15.5/lib/active_record/connection_adapters/mysql_adapter.rb:190:in 'quote' /Library/Ruby/Gems/1.8/gems/activerecord-1.15.5/lib/active_record/base.rb:2042:in 'quote_value' /Library/Ruby/Gems/1.8/gems/activerecord-1.15.5/lib/active_record/base.rb:2034:in 'attributes_with_quotes' Application uses Rails 1.2.5: there is no chance to update rails in this app. Somebody have solution?

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