On 02/06/2014 04:29 AM, Maurice James wrote:
OK I think I got it now. What I meant by NFS on each host was. In ovirt you can set up an NFS storage domain on each host and have the available to all hosts in the cluster
but then you have no replication/redudnacy in case a host fails, while with gluster with replication you don't care (well less) if a host fails?
*From:*Andrew Lau [mailto:[email protected]] *Sent:* Wednesday, February 05, 2014 9:25 PM *To:* Maurice James *Cc:* users *Subject:* Re: [Users] Gluster question I'm not sure what you mean by NFS each host, but you'll need some way to at least ensure the data is available. Be that be replicated gluster or a centralized SAN etc. On Thu, Feb 6, 2014 at 1:21 PM, Maurice James <[email protected] <mailto:[email protected]>> wrote: Hmm. So in that case would I be able to drop the Gluster setup and use NFS each host and make sure power fencing is enabled? Will that still achieve fault tolerance, or is a replicated gluster still required? *From:*Andrew Lau [mailto:[email protected] <mailto:[email protected]>] *Sent:* Wednesday, February 05, 2014 9:17 PM *To:* Maurice James *Cc:* users *Subject:* Re: [Users] Gluster question There was another recent post about this but a sum up was: You must have power fencing to support VM HA otherwise they'll be an issue with the engine not knowing whether the VM is still running and not bring it up on a new host to avoid data corruption. Also make sure you have your quorum setup properly based on your replication scenario so you can withstand 1 host being lost. I don't believe they'll "keep running" in a sense because of the host being lost, but they would restart on another host. At least that's what I've noticed in my case. On Thu, Feb 6, 2014 at 1:04 PM, Maurice James <[email protected] <mailto:[email protected]>> wrote: I currently have a new setup running ovirt 3.3.3. I have a Gluster storage domain with roughly 2.5TB of usable space. Gluster is installed on the same systems as the ovirt hosts. The host break down is as follows Ovirt DC: 4 hosts in the cluster. Each host has 4 physical disks in a RAID 5. Each disk is 500GB. With the OS installed and configured I end up with 1.2TB of usable space left for my data volume Gluster volume: 4 bricks with 1.2TB of space per brick (Distribute Replicate leaves me with about 2.5TB in the storage domain) Does this setup give me enough fault tolerance to survive losing a host and have my HA vm automatically move to an available host and keep running?? _______________________________________________ Users mailing list [email protected] <mailto:[email protected]> http://lists.ovirt.org/mailman/listinfo/users _______________________________________________ Users mailing list [email protected] http://lists.ovirt.org/mailman/listinfo/users
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