[Gluster-users] Per-client prefered server?

[Yannick Perret]

Le 08/03/2016 10:11, Krutika Dhananjay a écrit :
> IIUC, you would essentially be unmounting the volume from the old 
> building and mounting it near the new building, correct?
Well yes.

> In that case, you would need to set the read-subvolume-index command 
> line option appropriately when mounting again.
> The selection of the new read child will not happen automatically.
You're right but when mounts are from fstab the volumes may be still 
busy at end of boot-time. There are solutions: update fstab before 
shutdown, mount volumes later, re-reboot after editing…
But being able to propagate a new local value to client config without 
umount/mount may be usefull.

--
Y.
>
> HTH,
> Krutika
>
> On Fri, Mar 4, 2016 at 5:59 PM, Yannick Perret 
> <yannick.perret at liris.cnrs.fr <mailto:yannick.perret at liris.cnrs.fr>> 
> wrote:
>
>     Le 04/03/2016 13:12, Krutika Dhananjay a écrit :
>>     You could configure read-subvolume for individual clients using
>>     the following mount option:
>>
>>     mount -t glusterfs -o
>>     "xlator-option=*replicate*.read-subvolume-index=0"
>>     <hostname>:/<volname> <mountpoint>
>>
>>     In the example above, 0 represents the zeroth child. If a
>>     particular client wants to use the second brick as the read
>>     child, use the following:
>>
>>     mount -t glusterfs -o
>>     "xlator-option=*replicate*.read-subvolume-index=1"
>>     <hostname>:/<volname> <mountpoint>
>>
>     Thanks for that tip!
>     Just a question: as our clients can migrate beetween buildings
>     (not often, but it happens), does using something like 'mount -o
>     "remount,xlator-option=*replicate*.read-subvolume-index=X" …' will
>     allow the client to point to the new target without stopping
>     volume availability for clients?
>
>     --
>     Y.
>>     -Krutika
>>     ------------------------------------------------------------------------
>>
>>         *From: *"Yannick Perret" <yannick.perret at liris.cnrs.fr>
>>         <mailto:yannick.perret at liris.cnrs.fr>
>>         *To: *"Krutika Dhananjay" <kdhananj at redhat.com>
>>         <mailto:kdhananj at redhat.com>
>>         *Cc: *gluster-users at gluster.org
>>         <mailto:gluster-users at gluster.org>
>>         *Sent: *Friday, March 4, 2016 3:35:57 PM
>>         *Subject: *Re: [Gluster-users] Per-client prefered server?
>>
>>
>
>

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