From: Sage Weil Date: Mon, 18 Feb 2013 05:10:52 +0000 (-0800) Subject: doc/release-notes: add note about upgrade to v0.56.3 X-Git-Tag: v0.58~45 X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=aa537df673ca2bdd659644ee01e6a225a9393cba;p=ceph.git doc/release-notes: add note about upgrade to v0.56.3 Signed-off-by: Sage Weil --- diff --git a/doc/release-notes.rst b/doc/release-notes.rst index 40b5bb764a76..d7840fd645dc 100644 --- a/doc/release-notes.rst +++ b/doc/release-notes.rst @@ -10,6 +10,25 @@ significantly, an issue with OSDs being unresponsive shortly after startup (and occasionally crashing due to an internal heartbeat check) is resolved. Please upgrade. +Upgrading +~~~~~~~~~ + +* A bug was fixed in which the OSDMap epoch for PGs without any IO + requests was not recorded. If there are pools in the cluster that + are completely idle (for example, the ``data`` and ``metadata`` + pools normally used by CephFS), and a large number of OSDMap epochs + have elapsed since the ``ceph-osd`` daemon was last restarted, those + maps will get reprocessed when the daemon restarts. This process + can take a while if there are a lot of maps. A workaround is to + 'touch' any idle pools with IO prior to restarting the daemons after + packages are upgraded:: + + rados bench 10 write -t 1 -b 4096 -p {POOLNAME} + + This will typically generate enough IO to touch every PG in the pool + without generating significant cluster load, and also cleans up any + temporary objects it creates. + Notable changes ~~~~~~~~~~~~~~~