PendingReleaseNotes: add note about new mdlog trimming configurations

Signed-off-by: Venky Shankar <vshankar@redhat.com>

diff --git a/PendingReleaseNotes b/PendingReleaseNotes
index b374a1743f87c7475c5b6c94a8b9ae92fcaaf40f..dfc6294b36a2c86e53d0234023ec7cdc109a81c8 100644 (file)
--- a/PendingReleaseNotes
+++ b/PendingReleaseNotes
@@ -117,6 +117,10 @@ CephFS: Disallow delegating preallocated inode ranges to clients. Config
   manager module. Users may choose between two new modes: ``upmap-read``, which
   offers upmap and read optimization simultaneously, or ``read``, which may be used
   to only optimize reads. For more detailed information see https://docs.ceph.com/en/latest/rados/operations/read-balancer/#online-optimization.
+* CephFS: MDS log trimming is now driven by a separate thread which tries to
+  trim the log every second (`mds_log_trim_upkeep_interval` config). Also,
+  a couple of configs govern how much time the MDS spends in trimming its
+  logs. These configs are `mds_log_trim_threshold` and `mds_log_trim_decay_rate`.
 
 >=18.0.0