[Gluster-users] GlusterFS 3.7

[Gaurav Garg]

Hi Andreas,

>> Are there any restrictions as to when I'm allowed to make changes to the GlusterFS
volume (for instance: start/stop volume, add/remove brick or peer)?

There are no restriction to make changes to the GlusterFS volume its all depend on your need whether you want to start/stop volume, add/remove brick or peer.

>> How will it handle such changes when one of my two replicated servers is down? 

When one of the replicated server is down then it will lookup to another server which is online, and if you do any file operation from mount point it will be reflected to the replica count which is currently online. When second replica come back online then you can start heal operation on glusterFS volume, it will update the 2nd replica which was offline. 

>> How will GlusterFS know which set of configuration files it can trust when the other server is connected
again and the files will contain different information about the volume?

When other node (server) come online then it will do handshake with the node which was online and request for configuration file and the offline node which come back online will update the configuration file based on the updated configuration file it received. But you should not flout glusterFS configuration by editing volfile manually to avoid obscure behavior.

I hope that will answer your doubt.

Thank you...

Regards,
Gaurav Garg
 

----- Original Message -----
From: "Andreas Hollaus" <Andreas.Hollaus at ericsson.com>
To: gluster-users at gluster.org
Sent: Tuesday, September 22, 2015 1:32:08 PM
Subject: [Gluster-users] GlusterFS 3.7

Hi,

Are there any restrictions as to when I'm allowed to make changes to the GlusterFS
volume (for instance: start/stop volume, add/remove brick or peer)? How will it
handle such changes when one of my two replicated servers is down? How will GlusterFS
know which set of configuration files it can trust when the other server is connected
again and the files will contain different information about the volume? If these
were data files on the GlusterFS volume that would have been handled by the extended
file attributes, but how about the GlusterFS configuration itself?

Regards
Andreas

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