[Users] Gluster question

[Andrew Lau]

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 <midnightsteel at msn.com> 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: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>
> 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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