From ac3ab1a203ad65c7db07bc2c02acb5620800fb25 Mon Sep 17 00:00:00 2001 From: Venky Shankar Date: Thu, 17 Aug 2023 10:10:37 +0530 Subject: [PATCH] PendingReleaseNotes: add a note for `mds_session_metadata_threshold` mds config Signed-off-by: Venky Shankar --- PendingReleaseNotes | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/PendingReleaseNotes b/PendingReleaseNotes index df9c22cc192b1..8917fdadc0a03 100644 --- a/PendingReleaseNotes +++ b/PendingReleaseNotes @@ -8,6 +8,10 @@ For multi-site deployments that make any use of Server-Side Encryption, we recommended running this command against every bucket in every zone after all zones have upgraded. +* CEPHFS: MDS evicts clients which are not advancing their request tids which causes + a large buildup of session metadata resulting in the MDS going read-only due to + the RADOS operation exceeding the size threshold. `mds_session_metadata_threshold` + config controls the maximum size that a (encoded) session metadata can grow. >=18.0.0 -- 2.39.5