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  • Heartbeat/DRBD failover didn't work as expected. How do I make the failover more robust?

    - by Quinn Murphy
    I had a scenario where a DRBD-heartbeat set up had a failed node but did not failover. What happened was the primary node had locked up, but didn't go down directly (it was inaccessible via ssh or with the nfs mount, but it could be pinged). The desired behavior would have been to detect this and failover to the secondary node, but it appears that since the primary didn't go full down (there is a dedicated network connection from server to server), heartbeat's detection mechanism didn't pick up on that and therefore didn't failover. Has anyone seen this? Is there something that I need to configure to have more robust cluster failover? DRBD seems to otherwise work fine (had to resync when I rebooted the old primary), but without good failover, it's use is limited. heartbeat 3.0.4 drbd84 RHEL 6.1 We are not using Pacemaker nfs03 is the primary server in this setup, and nfs01 is the secondary. ha.cf # Hearbeat Logging logfacility daemon udpport 694 ucast eth0 192.168.10.47 ucast eth0 192.168.10.42 # Cluster members node nfs01.openair.com node nfs03.openair.com # Hearbeat communication timing. # Sets the triggers and pulse time for swapping over. keepalive 1 warntime 10 deadtime 30 initdead 120 #fail back automatically auto_failback on and here is the haresources file: nfs03.openair.com IPaddr::192.168.10.50/255.255.255.0/eth0 drbddisk::data Filesystem::/dev/drbd0::/data::ext4 nfs nfslock

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  • Delphi getting property value of a member from ClassType

    - by Kayode Yusuf
    I am implementing a Boilerplate feature - allow users to Change descriptions of some components - like Tlabels - at run time. e.g. TFooClass = Class ( TBaseClass) Label : Tlabel; ... End; Var FooClass : TFooClass; ... At Design time, the value Label's caption property is say - 'First Name', when the application is run, there is a feature that allows the user to change the caption value to say 'Other Name'. Once this is changed, the caption for the label for the class instance of FooClass is updated immediately. The problem now is if the user for whatever reason wants to revert back to the design time value of say 'First Name' , it seems impossible. I can use the RTTIContext methods and all that but I at the end of the day, it seems to require the instance of the class for me to change the value and since this has already being changed - I seem to to have hit a brick wall getting around it. My question is this - is there a way using the old RTTI methods or the new RTTIContext stuff to the property of a class' member without instantiating the class - i.e. getting the property from the ClassType definition. This is code snippet of my attempt at doing that : c : TRttiContext; z : TRttiInstanceType; w : TRttiProperty; Aform : Tform; .... Begin ..... Aform := Tform(FooClass); for vCount := 0 to AForm.ComponentCount-1 do begin vDummyComponent := AForm.Components[vCount]; if IsPublishedProp(vDummyComponent,'Caption') then begin c := TRttiContext.Create; try z := (c.GetType(vDummyComponent.ClassInfo) as TRttiInstanceType); w := z.GetProperty('Caption'); if w <> nil then Values[vOffset, 1] := w.GetValue(vDummyComponent.ClassType).AsString ..... ..... .... .... I am getting all sorts of errors and any help will be greatly appreciated.

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  • How to initiate a remote SVN update on server

    - by Bryan
    I'm using SVN for a project, and for easy deployments to the server we're just using another SVN enlistment there. So I've been using Remote Desktop to log onto the server and then trigger an update (we use Tortoise SVN). Is there an existing tool (or SVN feature) that would allow me to trigger this update without logging on to the server and doing it manually?

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  • How to send IM message like Skype in Android ?

    - by mob-king
    I have to build a feature in my application which allows user to send a skype message. For this I have installed skype lite client for Android (although offically the download has been currently withdrawn from Skype). Now how to initiate the activity from my application OR simply send the chat message without bringing it front, assuming I have skype installed in Android & also signed in already. Any help ? Thanks.

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  • Vim: open files of the matches on the lines given by Grep?

    - by HH
    I want to get automatically to the positions of the results in Vim after grepping, on command line. Is there such feature? Files to open in Vim on the lines given by grep: % grep --colour -n checkWordInFile * SearchToUser.java:170: public boolean checkWordInFile(String word, File file) { SearchToUser.java~:17: public boolean checkWordInFile(String word, File file) { SearchToUser.java~:41: if(checkWordInFile(word, f))

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  • Showing tokens in UITextField

    - by Miraaj
    Hi all, I want to get tokens appearance in UITextField as we have in NSTokenField ie. as soon as user enters some name in UITextField it gets enclosed within a token. We have this control in to-cc fields in mail in iPhone / iPod and I want to get similar feature in my application. Can anyone suggest me some solution for it?? Thanks, Miraaj

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  • Adding map overlays

    - by diana
    Hi all, I am using iPhone os4 for development. I need to add overlays to mapview. Apple now provides overlays as a new feature of os4. How can i add overlays.Any help will be greatly appreciated.

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  • Execute method on startup in spring

    - by Javi
    Hello, Is there any Spring 3 feature to execute some methods when the application starts for the first time? I know that I can do the trick of setting a method with @Scheduled annotation and it executes just after the startup, but then it will execute periodically. Thanks.

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  • C#: How would you only draw certain ListView Items while in Virtual Mode?

    - by Jonathan Richter
    C#: How would you only draw certain ListView Items while in Virtual Mode? I am trying to create a filter-like feature to use in listview so that if the user selects an imageindex from 0-5, it will loop through the listview items and only make it so that the items in question with the correct image index will be displayed and the other items will be hidden. How would I go upon creating such a routine?

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  • How can I get Windows 8 to automatically disable touch when I am using my Wacom pen and turn it back on when I am not

    - by Robert
    I have an HP convertible tablet computer which I just upgraded to Windows 8. The problem (which existed under Windows 7 as well) is that this tablet has both a capacitive touch screen (with multi-touch) AND a wacom-type tablet built in to the screen that works using electro-magnetic resonance with the provided stylus. My Use Case: Most of the time I am happy using my fingers and the touch interface for navigation and whatnot. However, when I want to get down to serious note-taking/drawing, I want to use the wacom functionality. The problem is that any comfortable writing position has me resting my arm/hand on the screen, which activates the touch technology (despite supposed palm-detection algorithms) and completely screws up my input paradigm. My Ideal Solution: Ideallly, since wacom technology senses when the pen is "close" to the screen, I would love to have touch be automatically disabled whenever the wacom pen is detected, and turned back on when it is out of range. this would allow me to seamless switch between the two input methods, and since I NEVER want to use both at once would work perfectly for me. An acceptable alternative: As a next best option, It would be great to be able to turn off the touch functionality (leaving the wacom in place) whenever I entered specific apps (e.g. OneNote, Photoshop, Gimp, Pencil, etc.) and then have it turn back on when I left that app.... As a worst case at least lets me use my PC option: If I could create a shortcut (tile or otherwise) that flips the touch on and off without going all the way through the nested computer settings, that would be better than nothing. Thanks in advance for the help with 1 or more of the above.

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  • "A disk read error occurred" after choosing to boot into Windows XP from GRUB

    - by kellogs
    "A disk read error occurred" appears on screen after choosing to boot into Windows XP from GRUB. [root@localhost linux]# fdisk -lu Disk /dev/sda: 160.0 GB, 160041885696 bytes 255 heads, 63 sectors/track, 19457 cylinders, total 312581808 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x48424841 Device Boot Start End Blocks Id System /dev/sda1 63 204214271 102107104+ 7 HPFS/NTFS Partition 1 does not end on cylinder boundary. /dev/sda2 204214272 255606783 25696256 af HFS / HFS+ Partition 2 does not end on cylinder boundary. /dev/sda3 255606784 276488191 10440704 c W95 FAT32 (LBA) Partition 3 does not end on cylinder boundary. /dev/sda4 276490179 312576704 18043263 5 Extended /dev/sda5 * 276490240 286709759 5109760 83 Linux /dev/sda6 286712118 310488254 11888068+ b W95 FAT32 /dev/sda7 310488318 312576704 1044193+ 82 Linux swap / Solaris Here, sda is a 160GB hard disk with quite a few partitions and 3 OSes installed. I am able to boot into Linux and Mac OS fine, but not into Windows anymore. The Windows system is located on /dev/sda1. I cannot recall how exactly have I used testdisk but it once said: Disk /dev/sda - 160 GB / 149 GiB - CHS 19458 255 63 The harddisk (160 GB / 149 GiB) seems too small! (< 169 GB / 157 GiB) Check the harddisk size: HD jumper settings, BIOS detection... So far I have tried to "fixboot" and "chkdsk" from a recovery console on the affected windows partition (/dev/sda1), the plug off power cord for 15 seconds trick, reinstalling GRUB, repairing the MFT and boot sector of the affected partition via testdisk, what next please? Thank you!

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  • Webrat select_date selector failure.

    - by sharas
    Code in steps file: select_date user.date_of_birth, :from => "Date of birth" Selector fail When I register with valid user credentials # features/step_definitions/authentication_steps.rb:2 Could not find field: "user_date_of_birth_1i_1i" (Webrat::NotFoundError) ./features/step_definitions/authentication_steps.rb:9:in `/^I register with valid user credentials$/' features/authentication.feature:6:in `When I register with valid user credentials' HTML output seems to be normal: <select name="user[date_of_birth(1i)]" id="user_date_of_birth_1i"> Is it bug, or I am doing something wrong

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  • Best editor for CodeIgniter?

    - by Rismo
    I'm learning CodeIgniter and I come from Microsoft Visual Studio so I'm used to the auto complete feature. I've been using notepad++ so far but I wonder if anyone knows an editor that works better with CodeIgniter. I would love to see features like: Right-click - Add new model Right-click - Add new view Autocomplete with CodeIgniter helpers and libraries

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  • Best approach to make Page Flip animation on iPhone (like magazine)

    - by 2Fast4YouBR
    Hi all, What would be the besta approach to make one oage flip like a real magazine, like I put the finger in the corner of the screen then flip the page... Like this video: http://www.youtube.com/watch?v=dy4Y9j7COgg&feature=related Is it a sequence of images ? all images are in one view or Imageview ? Or there is another way to do it using the some stuff of the SDK? is this effect exisits or we have to develop ? cheers

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  • How to assign Application Icon that will display in Task bar?

    - by viky
    I am working on a Wpf desktop application, whenever i run my application it shows me a window and associated tab in the task bar(Normal windows feature). My problem is that the tab is using window's icon for unknown file-type, I tried with Icon property of Window, Icon gets assigned but still problem is when I run application, task bar Tab initially displays window's icon for unknown file-type and when window-load completes it changes to the Icon assigned. I want Icon there from beginning. Any help?

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  • Mac text editor for Ruby on Rails

    - by kingjeffrey
    My text editor of choice for PHP work is Panic's Coda. But for Ruby on Rails, it's autocomplete feature is continuously in my way and ROR's standardization on 2 space tabs does not play well with Coda's settings. I've been going back to TextMate for ROR work, but was wondering if there were better options.

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  • Why is Perl commonly used as CGI scripts?

    - by Michael Vasquez
    I plan to add a better search feature to my site, so I thought that I would write it in C and use the CGI as a means to access it. But it seems that Perl is the most popular language when it comes to CGI-based stuff. Why is that? Wouldn't it be faster programmed in C or machine code? What advantages, if any, are there to writing it in a scripting language? Thanks.

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