Sponsored Content
Operating Systems AIX Question about HACMP for active-active mode Post 302366513 by bakunin on Thursday 29th of October 2009 06:00:47 PM
Old 10-29-2009
Quote:
Originally Posted by qiulang
BTW my original question was "what is the benefit of running HACMP for [...]
It seems to me like your real problem is adapting to the terminology of HACMP, in this case namely the term "resource group".

Suppose the classical case with no HACMP involved: you have a system where an application runs. The application has some disks holding its data and the data are all in a volume group. Further you have some network adapter (an IP adress) over which the users know they can contact the application.

Now lets abstract from this concept: what do we need to transfer to another system to transfer the task of serving the application? Answer: the volume group with the data, the IP adress the users expect, some start/stop mechanisms for the application - thats it. Exactly this is what is called a resource group. It is a data structure inside the HACMP configuration which binds together exactly these things.

Resource groups always reside on one node of a cluster and can be transferred to another node in case the active node dies. This is what shockneck has tried to explain to you in the active-active configuration: suppose your default would be a node A with some resource group A' operative and a node B with a RG B' operative. If node A dies, RG A' is being transferred to node B which will run both, vice versa, if node B dies.

Yes, "mutual takeover" is just another name for this mechanism. But however you call it, it helps to picture the RGs moving around on the nodes in case of hardware outages.

I hope this helps.

bakunin
 

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... (3 Replies)
Discussion started by: varungupta
3 Replies

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 (5 Replies)
Discussion started by: battaglia
5 Replies

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... (3 Replies)
Discussion started by: mk8570
3 Replies

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 (2 Replies)
Discussion started by: Mack1982
2 Replies

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... (4 Replies)
Discussion started by: dshakey
4 Replies

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... (1 Reply)
Discussion started by: urspradeep330
1 Replies

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 (3 Replies)
Discussion started by: fusetrips
3 Replies

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... (0 Replies)
Discussion started by: linux_user
0 Replies
CRM_FAILCOUNT(8)						  [FIXME: manual]						  CRM_FAILCOUNT(8)

NAME
crm_failcount - manipulate the failcount attribute on a given resource SYNOPSIS
crm_failcount [-?|-V] -D -u|-U node -r resource crm_failcount [-?|-V] -G -u|-U node -r resource crm_failcount [-?|-V] -v string -u|-U node -r resource DESCRIPTION
Heartbeat implements a sophisticated method to compute and force failover of a resource to another node in case that resource tends to fail on the current node. A resource carries a resource_stickiness attribute to determine how much it prefers to run on a certain node. It also carries a resource_failure_stickiness that determines the threshold at which the resource should failover to another node. The failcount attribute is added to the resource and increased on resource monitoring failure. The value of failcount multiplied by the value of resource_failure_stickiness determines the failover score of this resource. If this number exceeds the preference set for this resource, the resource is moved to another node and not run again on the original node until the failure count is reset. The crm_failcount command queries the number of failures per resource on a given node. This tool can also be used to reset the failcount, allowing the resource to run again on nodes where it had failed too often. OPTIONS
--help, -? Print a help message. --verbose, -V Turn on debug information. Note Increase the level of verbosity by providing additional instances. --quiet, -Q When doing an attribute query using -G, print just the value to stdout. Use this option with -G. --get-value, -G Retrieve rather than set the preference. --delete-attr, -D Specify the attribute to delete. --attr-value string, -v string Specify the value to use. This option is ignored when used with -G. --node-uuid node_uuid, -u node_uuid Specify the UUID of the node to change. --node-uname node_uname, -U node_uname Specify the uname of the node to change. --resource-id resource name, -r resource name Specify the name of the resource on which to operate. EXAMPLES
Reset the failcount for the resource myrsc on the node node1: crm_failcount -D -U node1 -r my_rsc Query the current failcount for the resource myrsc on the node node1: crm_failcount -G -U node1 -r my_rsc FILES
/var/lib/heartbeat/crm/cib.xml--the CIB (minus status section) on disk. Editing this file directly is strongly discouraged. SEE ALSO
???, ???, and the Linux High Availability FAQ Web site[1] AUTHOR
crm_failcount was written by Andrew Beekhof. NOTES
1. Linux High Availability FAQ Web site http://www.linux-ha.org/v2/faq/forced_failover [FIXME: source] 07/05/2010 CRM_FAILCOUNT(8)
All times are GMT -4. The time now is 05:10 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy