[Users] Gluster question

[Maurice James]

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 at 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 at msn.com
<mailto:midnightsteel at 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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