7:54 a.m.
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Just curious. Would Gluster with a JBOD configuration make sense in this
scenario? Maybe with dm-cache on the SSDs?
In general, does a Gluster JBOD configuration make sense as a backend
for oVirt?
Eduardo Mayoral Jimeno (emayoral(a)arsys.es)
Administrador de sistemas. Departamento de Plataformas. Arsys internet.
+34 941 620 145 ext. 5153
On 13/11/17 12:47, FERNANDO FREDIANI wrote:
Helli Rudi
Nice specs.
I wouldn't use GlusterFS for this setup with the third server in a
different location. Just have this server as an Standalone and
replicate the VMs there. You won't have real time replication, but
much less hassle and probably to have constant failures, specially
knowing you have a wireless link.
For the SSDs I have been using bcache with success. Relatively simple
to setup and pretty good performance.
For your specs as you have 4 mechanical disks I would recommend you to
have a RAID 5 between them (4 disks is my limit for RAID 5) and a RAID
0 made of SSDs for the bcache device. If the RAID 0 fails for any
reason it will fall back directly to the mechanical disks and you can
do maintenance on the Node doing live migration in order to replace
the failed disks.
However as you have you have 2 remaining server to create your cluster
you may need to consider GlusterFS on the top of this RAID to have the
replication and Highavaibility.
Hope it helps.
Fernando
On 13/11/2017 08:03, Rudi Ahlers wrote:
> Hi,
>
> Can someone please give me some pointers, what would be the best
> setup for performance and reliability?
>
> We have the following hardware setup:
>
> 3x Supermicro server with following features per server:
> 128GB RAM
> 4x 8TB SATA HDD
> 2x SSD drives (intel_ssdsc2ba400g4 - 400GB DC S3710)
> 2x 12 core CPU (Intel(R) Xeon(R) CPU E5-2650 v4 @ 2.20GHz
> Quad port 10Gbe Inter NIC
> 2x 10GB Cisco switches (to isolate storage network from LAN)
>
> One of the servers will be in another office, with a 600Mb wireless
> link for Disaster Recovery.
>
> What is recommended for the best setup in terms of redundancy and speed?
>
> I am guessing GlusterFS with a Distributed Striped Replicated Volume
> across 3 of the servers.
>
> For added performance I want to use the SSD drives, perhaps with
> dm-cache?
>
> Should I combine the 4x HDD's using LVM on each host node?
> What about RAID 6?
>
>
>
> Virtual Machines will then reside on the oVirt Cluster and any one of
> the 3 host nodes can fail, or any single HDD can fail and all should
> still work, right/?
>
>
>
>
> --
> Kind Regards
> Rudi Ahlers
> Website: http://www.rudiahlers.co.za
>
>
> _______________________________________________
> Users mailing list
> Users(a)ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
_______________________________________________
Users mailing list
Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
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<p>Just curious. Would Gluster with a JBOD configuration make sense
in this scenario? Maybe with dm-cache on the SSDs?</p>
<p>In general, does a Gluster JBOD configuration make sense as a
backend for oVirt?<br>
</p>
<pre class="moz-signature" cols="72">Eduardo Mayoral Jimeno
(<a class="moz-txt-link-abbreviated"
href="mailto:emayoral@arsys.es">emayoral@arsys.es</a>)
Administrador de sistemas. Departamento de Plataformas. Arsys internet.
+34 941 620 145 ext. 5153</pre>
<div class="moz-cite-prefix">On 13/11/17 12:47, FERNANDO FREDIANI
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:8940c496-6d8d-ddf7-7b57-3f828f9102d2@upx.com">
<meta http-equiv="Content-Type" content="text/html;
charset=utf-8">
<p>Helli Rudi</p>
<p>Nice specs.</p>
<p>I wouldn't use GlusterFS for this setup with the third server
in a different location. Just have this server as an Standalone
and replicate the VMs there. You won't have real time
replication, but much less hassle and probably to have constant
failures, specially knowing you have a wireless link.</p>
<p>For the SSDs I have been using bcache with success. Relatively
simple to setup and pretty good performance.</p>
<p>For your specs as you have 4 mechanical disks I would recommend
you to have a RAID 5 between them (4 disks is my limit for RAID
5) and a RAID 0 made of SSDs for the bcache device. If the RAID
0 fails for any reason it will fall back directly to the
mechanical disks and you can do maintenance on the Node doing
live migration in order to replace the failed disks.</p>
<p>However as you have you have 2 remaining server to create your
cluster you may need to consider GlusterFS on the top of this
RAID to have the replication and Highavaibility.</p>
<p>Hope it helps.</p>
<p>Fernando<br>
</p>
<br>
<div class="moz-cite-prefix">On 13/11/2017 08:03, Rudi Ahlers
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAAj3DjmsZOkkzTZ_wYz-B7_xV9YoKgknyD0r=RJu5=sa0i7=wg@mail.gmail.com">
<div dir="ltr">Hi,
<div><br>
</div>
<div>Can someone please give me some pointers, what would be
the best setup for performance and reliability?</div>
<div><br>
</div>
<div>We have the following hardware setup:</div>
<div>
<div><font color="#2c2c2c" face="Open Sans,
Helvetica,
Arial, sans-serif"><span
style="font-size:14.6667px"><br>
</span></font></div>
<div><font color="#2c2c2c" face="Open Sans,
Helvetica,
Arial, sans-serif"><span
style="font-size:14.6667px">3x
Supermicro server with following features per
server:</span></font></div>
<div><font color="#2c2c2c" face="Open Sans,
Helvetica,
Arial, sans-serif"><span
style="font-size:14.6667px">128GB
RAM</span></font></div>
<div><font color="#2c2c2c" face="Open Sans,
Helvetica,
Arial, sans-serif"><span
style="font-size:14.6667px">4x
8TB SATA HDD</span></font></div>
<div><font color="#2c2c2c" face="Open Sans,
Helvetica,
Arial, sans-serif"><span
style="font-size:14.6667px">2x
SSD drives (intel_ssdsc2ba400g4 - 400GB DC
S3710)</span></font></div>
<div><font color="#2c2c2c" face="Open Sans,
Helvetica,
Arial, sans-serif"><span
style="font-size:14.6667px">2x
12 core CPU (Intel(R) Xeon(R) CPU E5-2650 v4 @
2.20GHz</span></font></div>
<div><font color="#2c2c2c" face="Open Sans,
Helvetica,
Arial, sans-serif"><span
style="font-size:14.6667px">Quad
port 10Gbe Inter NIC</span></font></div>
<div><font color="#2c2c2c" face="Open Sans,
Helvetica,
Arial, sans-serif"><span
style="font-size:14.6667px">2x
10GB Cisco switches (to isolate storage network from
LAN)</span></font></div>
</div>
<div><br>
</div>
<div>
<div>One of the servers will be in another office, with a
600Mb wireless link for Disaster Recovery. </div>
<div><br>
</div>
<div>What is recommended for the best setup in terms of
redundancy and speed?</div>
<div><br>
</div>
<div>I am guessing GlusterFS with a Distributed Striped
Replicated Volume across 3 of the servers. </div>
<div><br>
</div>
<div>For added performance I want to use the SSD drives,
perhaps with dm-cache?</div>
<div><br>
</div>
<div>Should I combine the 4x HDD's using LVM on each host
node?</div>
<div>What about RAID 6?</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div>
<div>Virtual Machines will then reside on the oVirt
Cluster and any one of the 3 host nodes can fail, or any
single HDD can fail and all should still work, right/? </div>
</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
-- <br>
<div class="gmail_signature">Kind Regards<br>
Rudi Ahlers<br>
Website: <a href="http://www.rudiahlers.co.za"
target="_blank"
moz-do-not-send="true">http://www.rudiahlers.co.za</a><br>
</div>
</div>
</div>
<br>
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