[Gluster-users] Per-client prefered server?

[Yannick Perret]

Le 03/03/2016 13:18, Krutika Dhananjay a écrit :
> What does "nearest" storage server mean? Are the clients residing in 
> the storage pool too? Or are they external to the cluster?
>
They are external.
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.

--
Y.
> -Krutika
> ------------------------------------------------------------------------
>
>     *From: *"Yannick Perret" <yannick.perret at liris.cnrs.fr>
>     *To: *gluster-users at gluster.org
>     *Sent: *Thursday, March 3, 2016 5:38:33 PM
>     *Subject: *[Gluster-users] Per-client prefered server?
>
>     Hello,
>
>     I can't find if it is possible to set a prefered server on a
>     per-client
>     basis for replica volumes, so I ask the question here.
>
>     The context: we have 2 storage servers, each in one building. We also
>     have several virtual machines on each building, and they can migrate
>     from one building to an other (depending on load, maintenance…).
>
>     So (for testing at this time) I setup a x2 replica volume, one
>     replica
>     on each storage server of course. As most of our volumes are "many
>     reads
>     - few writes" it would be better for bandwidth that each client
>     uses the
>     "nearest" storage server (local building switch) - for reading, of
>     course. The 2 buildings have a good netlink but we prefer to
>     minimize -
>     when not needed - data transferts beetween them (this link is shared).
>
>     Can you see a solution for this kind of tuning? As far as I
>     understand
>     geo-replica is not really what I need, no?
>
>     It exists "cluster.read-subvolume" option of course but we can have
>     clients on both building so a per-volume option is not what we
>     need. An
>     per-client equivalent of this option should be nice.
>
>     I tested by myself a small patch to perform this - and it seems to
>     work
>     fine as far as I can see - but 1. before continuing in this way I
>     would
>     first check if it exists an other way and 2. I'm not familiar with
>     the
>     whole code so I'm not sure that my tests are in the
>     "state-of-the-art"
>     for glusterfs.
>
>     Thanks in advance for any help.
>
>     Regards,
>     --
>     Y.
>
>
>
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>

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