9:02 a.m.
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Hello.
Out of curiosity, why do you and people in general use more replica 3
than replica 2 ?
If I understand correctly this seems overkill and waste of storage as 2
copies of data (replica 2) seems pretty reasonable similar to RAID 1
and still in the worst case the data can be replicated after a fail. I
see that replica 3 helps more on performance at the cost of space.
Fernando
On 24/04/2017 08:33, Sven Achtelik wrote:
Hi All,
my oVirt-Setup is 3 Hosts with gluster and reaplica 3. I always try to
stay on the current version and Im applying updates/upgrade if there
are any. For this I put a host in maintenance and also use the Stop
Gluster Service checkbox. After its done updating Ill set it back
to active and wait until the engine sees all bricks again and then
Ill go for the next host.
This worked fine for me the last month and now that I have more and
more VMs running the changes that are written to the gluster volume
while a host is in maintenance become a lot more and it takes pretty
long for the healing to complete. What I dont understand is that I
dont really see a lot of network usage in the GUI during that time
and it feels quiet slow. The Network for the gluster is a 10G and Im
quiet happy with the performance of it, its just the healing that
takes long. I noticed that because I couldnt update the third host
because of unsynced gluster volumes.
Is there any limiting variable that slows down traffic during healing
that needs to be configured ? Or should I maybe change my updating
process somehow to avoid having so many changes in queue?
Thank you,
Sven
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<p>Hello.</p>
<p>Out of curiosity, why do you and people in general use more
replica 3 than replica 2 ?</p>
<p>If I understand correctly this seems overkill and waste of
storage as 2 copies of data (replica 2) seems pretty reasonable
similar to RAID 1 and still in the worst case the data can be
replicated after a fail. I see that replica 3 helps more on
performance at the cost of space.</p>
<p>Fernando<br>
</p>
<br>
<div class="moz-cite-prefix">On 24/04/2017 08:33, Sven Achtelik
wrote:<br>
</div>
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<p class="MsoNormal">Hi All, <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">my
oVirt-Setup is 3
Hosts with gluster and reaplica 3. I always try to stay on
the current version and Im applying updates/upgrade if
there are any. For this I put a host in maintenance and also
use the Stop Gluster Service checkbox. After its done
updating Ill set it back to active and wait until the
engine sees all bricks again and then Ill go for the next
host. <o:p></o:p></span></p>
<p class="MsoNormal"><span
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">This
worked fine for me
the last month and now that I have more and more VMs running
the changes that are written to the gluster volume while a
host is in maintenance become a lot more and it takes pretty
long for the healing to complete. What I dont understand is
that I dont really see a lot of network usage in the GUI
during that time and it feels quiet slow. The Network for
the gluster is a 10G and Im quiet happy with the
performance of it, its just the healing that takes long. I
noticed that because I couldnt update the third host
because of unsynced gluster
volumes.<o:p></o:p></span></p>
<p class="MsoNormal"><span
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Is there
any limiting
variable that slows down traffic during healing that needs
to be configured ? Or should I maybe change my updating
process somehow to avoid having so many changes in queue?
<o:p></o:p></span></p>
<p class="MsoNormal"><span
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Thank you,
<o:p></o:p></span></p>
<p class="MsoNormal"><span
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
lang="EN-US">Sven<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<br>
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