Question about HACMP for active-active mode Post: 302365516

Sponsored Content

Operating Systems AIX Question about HACMP for active-active mode Post 302365516 by shockneck on Tuesday 27th of October 2009 09:38:38 AM

10-27-2009

Registered User

HACMP terminology changed now and then. Some terms were used with older HACMP versions 3 and 4, some came into existence with the current HACMP Version 5 while others ceased to exist. The same is true with certain functions/possibilities. IBM Speak itself can be a bit challenging but when you mix up words from different times you end up in a mess.

An active-active cluster has (at least) two nodes and two Resource Groups RG. So there is one RG per node and only during takeover/failover two RG are on one node. This is a very good setup because during normal operation the RG (its application) has its dedicated CPU/RAM/IO. Furthermore not everybody can afford running (i.e. paying for) two servers but using only one. It does not at all mean that there is no takeover / failover possible.

A concurrent HACMP RG means Oracle RAC. I am not aware of another application that is able to run as a concurrent HACMP cluster. While there are two or more nodes active at a time this is not usually called an active-active configuration as no takeover is involved. In a concurrent cluster a node may die but the other(s) keep on working regardless.

Cascading / rotating is related to RG behaviour. If there is a fixed order of how the RG is taken over from node to node (usually in a Cluster with 3+ nodes that are different so that using certain nodes is perferable) this is a cascading behaviour. If the RG does not care on what node it is active, i.e. it can be active on any node a rotation of the RG might be OK.

Concurrent volume group are rarely used these days. Today you are likely to use Enhanced Concurrent Mode VG. And Oracle RAC can use an ECM VG in a Concurrent Cluster.

As you might have guessed by now already: some reading might be required. If you are an absolute beginner with HACMP you might start by reading the HACMP cookbook from December 2005 followed by the PowerHA cookbook (yes, the name changed with 5.5 ....) from September 09.

shockneck

View Public Profile for shockneck

Find all posts by shockneck

8 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

Active / Non Active users ?

Hey, I have few Questions : 1. How to Check/Find who all are the users accessing the server using their id ? 2. How to Check who is the active user or non active user (whose id exists but the access privileges has been removed) ? I am presently using AIX5.3 as a server. Please suggest...

2. UNIX for Dummies Questions & Answers

active working

hi! i want to create a list of the active working of the system classified by size and run the list on the monitor in a contolled pattern.Every active work has to appear only once. Any suggestions? also how can i create a list of the active working that does not belong to the user root?thanks

3. AIX

AIX HACMP Active/Passive Config

I have a HACMP 6.1 configured in a active/passive. I have 1 NIC with 3 IP address on (Boot, Persistent and Service ) . All address are routable. One of the application on the HA cluster is also using Boot Ip to send application data. Question : Since all the traffic is passing thru the same...

4. Solaris

Link based Active Active IPMP

Hi, I need to configure 4 ip address (same subnet and mask) in one ipmp group (two interfaces) in an active active formation (link based). Can some one provide the steps or a tutorial link. Thanks

5. Solaris

Port Active?

Hi, I have recently installed autosys R11 on my a container in solaris 10. the container has solaris 10. I am now trying to configure the autosys workload contol center on a windows VM. but i can not get the contol center to log into the the autosys server. when i try to estiblish a...

6. Linux

active mode ftp connection from linux

Hi, We have one java client which connects to a windows server through ftp in active mode and gets files. When we run this client on hp-ux, it is able to transfer 100k files. But when we run the same client on Linux server it is able to transfer only 200 files at max and it is hanging there...

7. Shell Programming and Scripting

How do I calculate total number of active and non active hosts?

#!/bin/bash for digit in $(seq 1 10) do if ping -c1 -w2 192.168.1.$digit &> /dev/null then echo "192.168.1.$digit is UP" else echo "192.168.1.$digit is DOWN" fi done

8. Solaris

VCS not active

Dear All, My current system run Solaris 9 SPARC 64 bit , and VXVM , VCS 4.1. I check all the node information . ls -l /etc/vx/*.exclude /etc/vx/*.exclude: No such file or directory root@devuardbs01 # vxdctl license All features are available: Mirroring Root Mirroring Concatenation...

LEARN ABOUT SUSE

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)