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

[Anton VG]

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?

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.