8:59 a.m.
Hi Jayme, thanks for the info… yes I’ve been googling and googling… I run a few VMware
VSANs at the moment so HCI is my specialty … even one in my basement 😊 going to upgrade
that to all flash soon as the 2TB disks are getting cheaper!
I tried doing this a couple of years back as my post says but it was pretty much undoable
then. I guess I am going to go h/w raid to start and see how that is. I haven’t got the
money to put SSD in the 720s, but I do have 10Gb networking so hoping that will help on
speed… anyway, it’s a PoC so I am sure I will building and rebuilding a few times and
trying to remember what I know of GlusterFS.
Regards
Bill
From: Jayme [mailto:jaymef@gmail.com]
Sent: Wednesday, May 23, 2018 6:25 AM
To: william.dossett(a)gmail.com
Cc: users <users(a)ovirt.org>
Subject: Re: [ovirt-users] ovirt and gluster disk config
Unfortunately there is not a lot of info out there about ideal hardware configs for
hyperconverged oVirt (at least not that I have found to date, and believe me I've
looked). If you have enough drives and especially if they are spinning disks as far as I
know your best option would likely be to do a RAID-10 config to make up a single glusterfs
brick on each physical server. Raid-10 will add some performance benefits and also give
you some options to replace failed disks without bringing the brick offline. The downfall
is that you waste a ton of usable space with Raid + gluster because each offer redundancy.
I'm about to build a 3 node hyperconverted oVirt setup on Dell R720s myself, but
I'm planning on using two 2Tb SSDs in JBOD configuration per host w/ a gluster replica
3. I've gone back and forth on using JBOD or Raid config with SSDs and never did get
a clear answer (online or asking on this mailing list). SSDs are too expensive right now
to lose half usable space to raid then another half or more to gluster replication.
On Tue, May 22, 2018 at 7:17 PM, <william.dossett(a)gmail.com
<mailto:william.dossett@gmail.com> > wrote:
Hey, been a few years since I looked at ovirt. 3 years probably and at the time I was
looking for compute and storage all in one -and was advised not to basically. So
Hyperconvergence is now a thing and want to try it out. I was looking at the blog - up
and running with ovirt 4.1, but it seems that is mostly for a lab setup. I've got
some real hardware I am going to try this out on as a PoC, 5 Dell R720s with 12 TB raw
storage in each. Just wondered if there was a guide to the hardware setup of my storage
that I am missing? Should I configure the storage as hardware RAID before I start
installing the Nodes? I did setup glusterfs cluster 3 years ago as well but memory fails
me on how I had the RAID controller setup if at all.
Thanks
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