Supported Features of Kernel Driver

Inline data

Inline data was introduced by the Firefly release. Linux kernel clients >= 3.19 can read inline data, can convert existing inline data to RADOS objects when file data is modified. At present, Linux kernel clients do not store file data as inline data.

See Experimental Features for more information.

Quotas

Quota was first introduced by the hammer release. Quota disk format got renewed by the Mimic release. Linux kernel clients >= 4.17 can support the new format quota. At present, no Linux kernel client support the old format quota.

See Quotas for more information.

Multiple file systems within a Ceph cluster

The feature was introduced by the Jewel release. Linux kernel clients >= 4.7 can support it.

See Experimental Features for more information.

Multiple active metadata servers

The feature has been supported since the Luminous release. It is recommended to use Linux kernel clients >= 4.14 when there are multiple active MDS.

Snapshots

The feature has been supported since the Mimic release. It is recommended to use Linux kernel clients >= 4.17 if snapshot is used.