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Diffstat (limited to 'doc/cephfs/standby.rst')
| -rw-r--r-- | doc/cephfs/standby.rst | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/doc/cephfs/standby.rst b/doc/cephfs/standby.rst index 367c6762b..e20735aaa 100644 --- a/doc/cephfs/standby.rst +++ b/doc/cephfs/standby.rst @@ -118,10 +118,16 @@ enforces this affinity. When failing over MDS daemons, a cluster's monitors will prefer standby daemons with ``mds_join_fs`` equal to the file system ``name`` with the failed ``rank``. If no standby exists with ``mds_join_fs`` equal to the file system ``name``, it will -choose an unqualified standby (no setting for ``mds_join_fs``) for the replacement, -or any other available standby, as a last resort. Note, this does not change the -behavior that ``standby-replay`` daemons are always selected before -other standbys. +choose an unqualified standby (no setting for ``mds_join_fs``) for the replacement. +As a last resort, a standby for another filesystem will be chosen, although this +behavior can be disabled: + +:: + + ceph fs set <fs name> refuse_standby_for_another_fs true + +Note, configuring MDS file system affinity does not change the behavior that +``standby-replay`` daemons are always selected before other standbys. Even further, the monitors will regularly examine the CephFS file systems even when stable to check if a standby with stronger affinity is available to replace an |