[Bugs] [Bug 1322299] DHT: Rebalance hang while migrating the files of disperse volume
bugzilla at redhat.com
bugzilla at redhat.com
Thu Mar 31 12:45:55 UTC 2016
https://bugzilla.redhat.com/show_bug.cgi?id=1322299
--- Comment #2 from Vijay Bellur <vbellur at redhat.com> ---
COMMIT: http://review.gluster.org/13849 committed in release-3.7 by Pranith
Kumar Karampuri (pkarampu at redhat.com)
------
commit 3d34c495d547866a533bc0614b14163381830095
Author: Ashish Pandey <aspandey at redhat.com>
Date: Wed Feb 17 15:57:02 2016 +0530
cluster/ec: Rebalance hangs during rename
Problem:
During the rename of a particular file (ec
is holding blocking inodelk on the parent
directory), if the rename of another file
under the same directory comes. EC does not
release the lock and goes ahead and renames
the "new" file with the "already held lock".
That causes rebalance process to be blocked
on a lock which has been acquired by rename.
Solution:
While rename fop comes, ec takes blocking inodelk
on old and new parent of the file. Before releasing,
every lock held by ec, it waits for some "time" to
see if that lock can be reused by the next fop.
If within this "time" some other request comes,
it releases this lock based on condition
"lock count > 1"
To get this "lock count" for rename fop, we have
implemented "pl_rename" in feature/lock. Also,
on ec side, changed the condition to release the lock
based on the type of fop and old and new parent
directories.
master-
http://review.gluster.org/#/c/13460/
Change-Id: I979dbab1185df962e8f305a6074ae1186ffe7db0
Bug: 1322299
Signed-off-by: Ashish Pandey <aspandey at redhat.com>
Reviewed-on: http://review.gluster.org/13849
Smoke: Gluster Build System <jenkins at build.gluster.com>
CentOS-regression: Gluster Build System <jenkins at build.gluster.com>
NetBSD-regression: NetBSD Build System <jenkins at build.gluster.org>
Reviewed-by: Pranith Kumar Karampuri <pkarampu at redhat.com>
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