.Update to the heartbeat grace period Previously, when there were no Ceph OSD failures for more than 48 hours, there was no mechanism to reset the grace timer back to the default value. With this release, the heartbeat grace timer is reset to the default value of 20 seconds, if there have been no failures on a Ceph OSD for 48 hours. When the failure interval between the last failure and the latest failure exceeds 48 hours, the grace timer is reset to the default value of 20 seconds. The grace time is the interval in which a Ceph storage cluster considers a Ceph OSD as down by the absence of a heartbeat. The grace time is scaled based on lag estimations or on how frequently a Ceph ODS is experiencing failures.