Hi, I can give you some information on multipathing on RHEV-H, as I don't have ovirt-node installed at the moment. Multipath packages are installed on the hypervisor, but vdsm overwrites multipath.conf. To prevent this you have to set the following tags: # RHEV REVISION 0.7 # RHEV PRIVATE Search for MPATH_CONF_TAG in multipath.py file to get correct RHEV REVISION number. After changing multipath.conf to fit your needs make it persistent for reboots: # persist /etc/multipath.conf You can check multipath status with: # multipath -ll mpathb (2222b00015521f5d4) dm-0 Intel,Multi-Flex size=96G features='0' hwhandler='0' wp=rw |-+- policy='round-robin 0' prio=50 status=active | `- 0:0:0:1 sdb 8:16 active ready running mpatha (222140001553601d1) dm-1 Intel,Multi-Flex size=20G features='0' hwhandler='0' wp=rw |-+- policy='round-robin 0' prio=50 status=active | `- 0:0:0:0 sda 8:0 active ready running I hope this helps. Don't really know if the tags are the same in oVirt, as I don't have a working oVirt setup at the moment. -- Best Regards, DI (FH) René Koch Senior Solution Architect ============================================ ovido gmbh - "Das Linux Systemhaus" Brünner Straße 163, A-1210 Wien Phone: +43 720 / 530 670 Mobile: +43 660 / 512 21 31 E-Mail: r.koch@ovido.at ============================================ On Fri, 2012-12-07 at 13:55 +0000, Jonathan Horne wrote:
From: Jonathan Horne <jhorne@skopos.us> Date: Thursday, December 6, 2012 1:04 PM To: users <users@ovirt.org> Subject: [Users] iscsi mpio
Hello,
I just rebooted my iscsi SAN and the ovirt node 2.5.5fc17 did not enjoy that one bit. Does ovirt node support multi path i/o? Any information about this would be greatly appreciated.
Thanks, jonathan
I attempted to install the multi path driver on node 2.5.5-0.fc17, but the file system is read only and i can't make changes.
I really need to find out about multipathing, because yesterday i upgraded the firmware on my iscsi SAN yesterday, and one of my nodes freaked out and rebooted (oddly, the other 2 didn't). In understand there may already be multi path configured within the node, but how do i verify it with my set up?
Thanks, jonathan
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