This document is for a development version of Ceph.
MDS Autoscaler Module
The MDS Autoscaler Module monitors file systems to ensure sufficient MDS daemons are available. It works by adjusting the placement specification for the orchestrator backend of the MDS service. To enable, use:
The module will monitor the following file system settings to inform placement count adjustments:
max_mdsfile system setting
standby_count_wantedfile system setting
The Ceph monitor daemons are still responsible for promoting or stopping MDS
according to these settings. The
mds_autoscaler simply adjusts the
number of MDS which are spawned by the orchestrator.