[Gluster-users] gluster volume create

[Atin Mukherjee]

On 04/11/2015 01:21 AM, Andreas Hollaus wrote:
> Hi,
> 
> I wonder what happens when the command 'gluster volume create...' is
> executed? How is the file system on the brick affected by that command,
> data and meta-data (extended attributes)?
> 
> The reason for this question is that I have a strange use case where my
> 2 (mirrored) servers are restarted. At an early stage of the reboot
> phase, I have to create a new gluster file system on each server so that
> the same directory can be used for read access. Later on, I would like
> to delete these single server volumes and replace them with the mirrored
> gluster volume I used before the restart.
> 
> I guess I can restore the previous volume definition from a backup of
> the gluster configuration files, but I'm worried that the 'gluster
> volume create...' command might have affected the brick so that it is in
> a different state compared to before the restart, when the restored
> gluster configuration was valid. I realize that for this to work, the
> extended attributes can not change while the mirrored volume is stopped.
> 
> Any idea if I can use glusterfs like this or am I violating some rules?
If I've understood your requirement correctly you are trying to convert
a distributed volume into a replicate one. In that case you would need
to convert it through add brick mentioned the replica count. I don't
think you would face any issues for restoring configurations if all the
steps are performed correctly.

~Atin
> 
> 
> Regards
> Andreas
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-- 
~Atin