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<div class="moz-cite-prefix">Le 03/03/2016 13:18, Krutika Dhananjay
a écrit :<br>
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cite="mid:1490899275.15722353.1457007509505.JavaMail.zimbra@redhat.com"
type="cite">
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12pt; color: #000000">
<div>What does "nearest" storage server mean? Are the clients
residing in the storage pool too? Or are they external to the
cluster?<br>
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They are external.<br>
Nearest means that they are in the same building, linked by the same
switch. Machines in the other building are rooted via some more
equipments.<br>
<br>
--<br>
Y.<br>
<blockquote
cite="mid:1490899275.15722353.1457007509505.JavaMail.zimbra@redhat.com"
type="cite">
<div style="font-family: garamond,new york,times,serif; font-size:
12pt; color: #000000">
<div>-Krutika<br>
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<hr id="zwchr">
<blockquote style="border-left:2px solid
#1010FF;margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"><b>From:
</b>"Yannick Perret" <a class="moz-txt-link-rfc2396E" href="mailto:yannick.perret@liris.cnrs.fr"><yannick.perret@liris.cnrs.fr></a><br>
<b>To: </b><a class="moz-txt-link-abbreviated" href="mailto:gluster-users@gluster.org">gluster-users@gluster.org</a><br>
<b>Sent: </b>Thursday, March 3, 2016 5:38:33 PM<br>
<b>Subject: </b>[Gluster-users] Per-client prefered server?<br>
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Hello,<br>
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</div>
I can't find if it is possible to set a prefered server on a
per-client <br>
basis for replica volumes, so I ask the question here.<br>
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The context: we have 2 storage servers, each in one building.
We also <br>
have several virtual machines on each building, and they can
migrate <br>
from one building to an other (depending on load,
maintenance…).<br>
<div><br>
</div>
So (for testing at this time) I setup a x2 replica volume, one
replica <br>
on each storage server of course. As most of our volumes are
"many reads <br>
- few writes" it would be better for bandwidth that each
client uses the <br>
"nearest" storage server (local building switch) - for
reading, of <br>
course. The 2 buildings have a good netlink but we prefer to
minimize - <br>
when not needed - data transferts beetween them (this link is
shared).<br>
<div><br>
</div>
Can you see a solution for this kind of tuning? As far as I
understand <br>
geo-replica is not really what I need, no?<br>
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</div>
It exists "cluster.read-subvolume" option of course but we can
have <br>
clients on both building so a per-volume option is not what we
need. An <br>
per-client equivalent of this option should be nice.<br>
<div><br>
</div>
I tested by myself a small patch to perform this - and it
seems to work <br>
fine as far as I can see - but 1. before continuing in this
way I would <br>
first check if it exists an other way and 2. I'm not familiar
with the <br>
whole code so I'm not sure that my tests are in the
"state-of-the-art" <br>
for glusterfs.<br>
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</div>
Thanks in advance for any help.<br>
<div><br>
</div>
Regards,<br>
--<br>
Y.<br>
<div><br>
</div>
<br>
<div><br>
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