[Gluster-devel] Backward compatibility of gluster 3.0.0 to 2.0.x?

[Raghavendra G]

On Thu, Dec 10, 2009 at 12:46 AM, Anton VG <anton.vazir at gmail.com> wrote:

> Hello!
>
> I'd like to ask if gluster 3.0.0 is backward compatible with 2.0.x
> version? So can I mount 2.0.x cluster with 3.0.0?
> Can I migrate cluster nodes 1-by-one, upgrading versions on the single
> host at once?
>

No. 3.0 is not backward compatible with 2.0.x. Both the client and server
should be of same version. However the backend directories need not change
while migrating to 3.0.0. You can just reinstall all the clients and
servers, restart the servers and mount all the clients.


>
> Just attempted to mount cluster as gluster 3.0.0 client (my existing
> cluster, based on 2.0.4) using the fstab mount - i do store the single
> .vol file on the cluster node.
> in the fstab i do use the following setting, which works fine with 2.0.4
>
> 10.177.4.15     /cluster        glusterfs  defaults,noauto  0  0
>
> but the 3.0.0 gives me the following error:
>
> anton-h:/# mount cluster
> syntax error in line 1: "option"
> (allowed tokens are 'volume', 'type', 'subvolumes', 'option', 'end-volume')
> error in parsing volume file given by server 10.177.4.15
> exiting
>
> My cluster consists out of 6 nodes, each of 2x bricks - so I have
> 1-to-one replication.
>
> Cheers,
> Anton.
>
>
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-- 
Raghavendra G
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