Sorry, i can't speak to RH since we run SLES. There have been some very recent fixes for it on s390x. I can't remember which component had the issues - i think pacemaker, not corosync - but basically it couldn't shutdown the domain controller without the cluster getting totally confused. It was using little endian in places where it needed to be big! SUSE put out those fixes on Dec 27. You should check that you don't have a problem shutting down the DC node and contact RH if you do.
Hope to save you the same fun :) Marcy -----Original Message----- From: linux-ha-boun...@lists.linux-ha.org [mailto:linux-ha-boun...@lists.linux-ha.org] On Behalf Of mike Sent: Friday, January 17, 2014 1:58 PM To: linux-ha@lists.linux-ha.org Subject: [Linux-HA] Questions about Pacemaker, corosyns DRBD and MySQL Hi guys, I've got a running HA Cluster with shared storage on RHEL 5 on s390x. It works fine but I've had to do some VM modifications underneath the covers to adequately implement a safe STONITH package due to RACF policies and so on. I'm starting to experiment with RHEL 6 and I think a great solution for me would be to implement DRBD with Pacemaker and Corosync since I believe it would release me from the VM modifications that I'd really like to avoid. I'm having a bit of a difficult time understanding how DRBD works to be honest. All of the examples show how to set up the cluster and then create a partition on both nodes for DRBD but I'm really lacking a deep understanding on how this works and so I'm a bit confused. I currently have the cluster built and mysql resource enabled and working. Regarding the DRBD partition that I create on each node - will this partition hold a database? For instance, I have 3 databases created - > wiki, drupal and testDB. Should I create a separate partition on each node for each one of these databases and insert them into DRBD config? So in effect I would have 3 separate filesystems /var/lib/wiki, /var/lib/drupal and /var/lib/testDB ? Or is this DRBD partition a sort of messaging partition that sits outside the database directories themselves and handles the transaction messaging to the actual database? Know what I mean? -tks Mike _______________________________________________ Linux-HA mailing list Linux-HA@lists.linux-ha.org http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems _______________________________________________ Linux-HA mailing list Linux-HA@lists.linux-ha.org http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
