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:andrew@andrewklau.com]
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 <midnightsteel@msn.com> 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??

 

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