Thanks -----Original Message----- From: Itamar Heim [mailto:[email protected]] Sent: Sunday, February 09, 2014 5:13 PM To: Maurice James; 'Andrew Lau' Cc: 'users' Subject: Re: [Users] Gluster question
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 > _______________________________________________ Users mailing list [email protected] http://lists.ovirt.org/mailman/listinfo/users
