You should be ok with the setup.
I am running around 20 vms (linux and windows, small and medium size) with
the half of your specs. With 10G network replica 3 is ok.


On Wed, Apr 4, 2018, 16:13 Jayme <jay...@gmail.com> wrote:

> I'm spec'ing hardware for a 3-node oVirt build (on somewhat of a budget).
> I plan to do 20-30 Linux VMs most of them very light weight + a couple of
> heavier hitting web and DB servers with frequent rsync backups.  Some have
> a lot of small files from large github repos etc.
> 3X of the following:
> Dell PowerEdge R720
> 2x 2.9 GHz 8 Core E5-2690 (SR0L0)
> 256GB RAM
> PERC H710
> 2x10GB Nic
> Boot/OS will likely be two cheaper small sata/ssd in raid 1.
> Gluster bricks comprised of 4x2TB WD Gold 7200RPM SATA HDDs in RAID 10 per
> server.  Using a replica 3 setup (and I'm thinking right now with no
> arbiter for extra redundancy, although I'm not sure what the performance
> hit may be as a result).  Will this allow for two host failure or just one?
> I've been really struggling with storage choices, it seems very difficult
> to predict the performance of glusterFS due to the variance in hardware
> (everyone is using something different).  I'm not sure if the performance
> will be adequate enough for my needs.
> I will be using an all ready existing Netgear XS716T 10GB switch for
> Gluster storage network.
> In addition I plan to build another simple glusterFS storage server that I
> can use to georeplicate the gluster volume to for DR purposes and use
> existing hardware to build an independent standby oVirt host that is able
> to start up a few high priority VMs from the georeplicated glusterFS volume
> if for some reason the primary oVirt cluster/glusterFS volume ever failed.
> I would love to hear any advice or critiques on this plan.
> Thanks!
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