.MDS cache limits can be configured in bytes
New configuration options are now supported that enable configuring Metadata Server (MDS) cache limits to be configured in bytes, not only in inodes count. For details, see the
https://access.redhat.com/documentation/en-us/red_hat_ceph_storage/3/html-single/ceph_file_system_guide/#understanding-mds-cache-size-limits[Understanding MDS Cache Size Limits] section in the Ceph File System Guide for Red Hat Ceph Storage 3. Note that limiting the MDS cache by the inodes count is now deprecated.