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Operating Systems AIX Question about HACMP for active-active mode Post 302365707 by qiulang on Tuesday 27th of October 2009 10:11:57 PM
Old 10-27-2009
Thanks for the answerd and looks like I have got a lot of reading to do! Man Smilie

BTW my original question was "what is the benefit of running HACMP for an active-active cluster with the same app running" Smilie and it looks like RAC may be the only one in this case, right?

And I did find out another term HACMP uses, "mutual takeover", which seems to be relevant to my question. So my understanding of "mutual takeover" is an active-active cluster with different app running (shared-nothing mode). It makes sense to using HACMP here. (and it also makes sense why they don't use the term "active-active" now). But is my understanding correct or I totally got it wrong ? Smilie
 

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mkqdisk(8)						      Quorum Disk Management							mkqdisk(8)

NAME
mkqdisk - Cluster Quorum Disk Utility WARNING
Use of this command can cause the cluster to malfunction. SYNOPSIS
mkqdisk [-?|-h] | [-L] | [-f label] [-c device -l label] [-d [-d ...]] DESCRIPTION
The mkqdisk command is used to create a new quorum disk or display existing quorum disks accessible from a given cluster node. OPTIONS
-c device -l label Initialize a new cluster quorum disk. This will destroy all data on the given device. If a cluster is currently using that device as a quorum disk, the entire cluster will malfunction. Do not run this on an active cluster when qdiskd is running. Only one device on the SAN should ever have the given label; using multiple different devices is currently not supported (it is expected a RAID array is used for quorum disk redundancy). The label can be any textual string up to 127 characters - and is therefore enough space to hold a UUID created with uuidgen(1). -f label Find the cluster quorum disk with the given label and display information about it. -L Display information on all accessible cluster quorum disks. -d Increase debugging level. Specify multiple times for more information. Currently, specifying more than twice has no effect. SEE ALSO
qdisk(5), qdiskd(8), uuidgen(1) July 2006 mkqdisk(8)
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