cluster/tier: account for reordered layouts

This is a backport of 11092

> For a tiered volume the cold subvolume is always at a fixed
> position in the graph. DHT's layout array, on the other hand,
> may have the cold subvolume in either the first or second
> index, therefore code cannot make any assumptions. The fix
> searches the layout for the correct position dynamically
> rather than statically.

> The bug manifested itself in NFS, in which a newly attached
> subvolume had not received an existing directory. This case
> is a "stale entry" and marked as such in the layout for
> that directory.  The code did not see this, because it
> looked at the wrong index in the layout array.

> The fix also adds the check for decomissioned bricks, and
> fixes a problem in detach tier related to starting the
> rebalance process: we never received the right defrag
> command and it did not get directed to the tier translator.

> Change-Id: I77cdf9fbb0a777640c98003188565a79be9d0b56
> BUG: 1214289
> Signed-off-by: Dan Lambright <dlambrig@redhat.com>

Change-Id: Idb2eec9ba25812f41de7f960a0314c92341d6b5d
BUG: 1259081
Signed-off-by: Dan Lambright <dlambrig@redhat.com>
Reviewed-on: http://review.gluster.org/12086
Tested-by: NetBSD Build System <jenkins@build.gluster.org>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: mohammed rafi  kc <rkavunga@redhat.com>

0 files changed, 0 insertions, 0 deletions