From: Greg Farnum Date: Mon, 17 Apr 2017 21:32:38 +0000 (-0700) Subject: PendingReleaseNotes: discuss snap trim improvements X-Git-Tag: v10.2.8~96^2~1 X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=a84dc8fe747d1e17c7910c9857f7f5d3d56e2dff;p=ceph.git PendingReleaseNotes: discuss snap trim improvements Signed-off-by: Greg Farnum --- diff --git a/PendingReleaseNotes b/PendingReleaseNotes index 6743d6fed45..cca45304244 100644 --- a/PendingReleaseNotes +++ b/PendingReleaseNotes @@ -5,3 +5,9 @@ is enabled (it's off by default). This means that a VM using librbd that previously would have gotten an EIO and gone read-only will now see a blocked/hung IO instead. +* This release greatly improves control and throttling of the snap trimmer. It + introduces the "osd max trimming pgs" option (defaulting to 2), which limits + how many PGs on an OSD can be trimming snapshots at a time. And it restores + the safe use of the "osd snap trim sleep" option, wihch defaults to 0 but + otherwise adds the given number of seconds in delay between every dispatch + of trim operations to the underlying system. \ No newline at end of file