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AIX
Question about HACMP for active-active mode
Post 302365740 by zxmaus on Wednesday 28th of October 2009 02:00:27 AM
10-28-2009
Moderator
Hi,
there is Sybase Cluster Edition that works similar to Oracle RAC.
In addition there are a lot of Vendor applications out there that have built in ha-facilities and can run / should run in a concurrent resource group - not for availability - but for load balancing reasons. And here the cluster facilities are not used for the applications themselves but for the infrastructure that points to the application. If one node goes down, the service IP just starts pointing to the other node - the application - though down on the previous node - remains available. Great solution for any kind of application that doesnt produce volatile data at all.
We have several clusters where Websphere and MQ are running active on both nodes - serving different functions - and again failover to the other node when required - serving different clients, different applications - and yes we want different instances of the same application being up on one node if the other node dies.
We have as well lots of sybase databases in a hacmp setup that have the same content but serve different purposes. Sybase replication server replicates the content of database 1 into database 2. As long as both nodes are up, database 1 is used for trading, database 2 for reporting - when one of the nodes dies, it fails over to the other node - replication remains running - and you still can use both databases for these different purposes - nothing in the listeners, pointer files or anything has to change because the IP of the application doesn't change ... and additional resources are just added via dlpar scripts if required - so nothing is starving ...
Possibilities are countless and so are the benefits of having live-live clusters
Kind regards
zxmaus
there is Sybase Cluster Edition that works similar to Oracle RAC.
In addition there are a lot of Vendor applications out there that have built in ha-facilities and can run / should run in a concurrent resource group - not for availability - but for load balancing reasons. And here the cluster facilities are not used for the applications themselves but for the infrastructure that points to the application. If one node goes down, the service IP just starts pointing to the other node - the application - though down on the previous node - remains available. Great solution for any kind of application that doesnt produce volatile data at all.
We have several clusters where Websphere and MQ are running active on both nodes - serving different functions - and again failover to the other node when required - serving different clients, different applications - and yes we want different instances of the same application being up on one node if the other node dies.
We have as well lots of sybase databases in a hacmp setup that have the same content but serve different purposes. Sybase replication server replicates the content of database 1 into database 2. As long as both nodes are up, database 1 is used for trading, database 2 for reporting - when one of the nodes dies, it fails over to the other node - replication remains running - and you still can use both databases for these different purposes - nothing in the listeners, pointer files or anything has to change because the IP of the application doesn't change ... and additional resources are just added via dlpar scripts if required - so nothing is starving ...
Possibilities are countless and so are the benefits of having live-live clusters
Kind regards
zxmaus
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LEARN ABOUT REDHAT
glutgamemodeget
glutGameModeGet(3GLUT) GLUT glutGameModeGet(3GLUT) NAME
glutGameModeGet - retrieves GLUT device information represented by integers. SYNTAX
int glutGameModeGet(GLenum info); ARGUMENTS
info Name of game mode information to retrieve. GLUT_GAME_MODE_ACTIVE Non-zero if GLUT's game mode is active; zero if not active. Game mode is not active initially. Game mode becomes active when glu- tEnterGameMode is called. Game mode becomes inactive when glutLeaveGameMode is called. GLUT_GAME_MODE_POSSIBLE Non-zero if the game mode string last specified to glutGameModeString is a possible game mode configuration; zero otherwise. Being "possible" does not guarantee that if game mode is entered with glutEnterGameMode that the display settings will actually changed. GLUT_GAME_MODE_DISPLAY_CHANGED should be called once game mode is entered to determine if the display mode is actually changed. GLUT_GAME_MODE_WIDTH Width in pixels of the screen when game mode is activated. GLUT_GAME_MODE_HEIGHT Height in pixels of the screen when game mode is activated. GLUT_GAME_MODE_PIXEL_DEPTH Pixel depth of the screen when game mode is activiated. GLUT_GAME_MODE_REFRESH_RATE Screen refresh rate in cyles per second (hertz) when game mode is activated. Zero is returned if the refresh rate is unknown or cannot be queried. GLUT_GAME_MODE_DISPLAY_CHANGED Non-zero if entering game mode actually changed the display settings. If the game mode string is not possible or the display mode could not be changed for any other reason, zero is returned. DESCRIPTION
glutGameModeGet retrieves GLUT game mode information represented by integers. The info parameter determines what type of game mode informa- tion to return. Requesting game mode information for an invalid GLUT game mode information name returns negative one. SEE ALSO
glutGet, glutDeviceGet, glutLayerGet, glutGameModeString, glutEnterGameMode, glutLeaveGameMode AUTHOR
Mark J. Kilgard (mjk@nvidia.com) GLUT
3.7 glutGameModeGet(3GLUT)