From: dparmar18 Date: Mon, 13 Jun 2022 14:11:40 +0000 (+0530) Subject: PendingReleaseNotes: added note related to new mds upgrade option using cephadm X-Git-Tag: v18.0.0~300^2~3 X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=c3fb65a2451df02691aeb49a0ab698ca48a392a6;p=ceph.git PendingReleaseNotes: added note related to new mds upgrade option using cephadm Signed-off-by: Dhairya Parmar --- diff --git a/PendingReleaseNotes b/PendingReleaseNotes index 0f84597d62df..3b7ec2322ba1 100644 --- a/PendingReleaseNotes +++ b/PendingReleaseNotes @@ -78,3 +78,15 @@ Relevant tracker: https://tracker.ceph.com/issues/55521 __ without the object-unique suffix. The conversion is fixed in this release. Relevant tracker: https://tracker.ceph.com/issues/5614 + +* Cephadm may now be configured to carry out CephFS MDS upgrades without +reducing ``max_mds`` to 1. Previously, Cephadm would reduce ``max_mds`` to 1 to +avoid having two active MDS modifying on-disk structures with new versions, +communicating cross-version-incompatible messages, or other potential +incompatibilities. This could be disruptive for large-scale CephFS deployments +because the cluster cannot easily reduce active MDS daemons to 1. +NOTE: Staggered upgrade of the mons/mgrs may be necessary to take advantage +of the feature, refer this link on how to perform it: +https://docs.ceph.com/en/quincy/cephadm/upgrade/#staggered-upgrade +Relevant tracker: https://tracker.ceph.com/issues/55715 +