=================
 Ceph Filesystem
=================

The :term:`Ceph Filesystem` (Ceph FS) is a POSIX-compliant filesystem that uses
a Ceph Storage Cluster to store its data. The Ceph filesystem uses the same Ceph
Storage Cluster system as Ceph Block Devices, Ceph Object Storage with its S3
and Swift APIs, or native bindings (librados).

.. important:: Ceph FS is currently not recommended for production data.

.. ditaa::
            +-----------------------+  +------------------------+
            | CephFS Kernel Object  |  |      CephFS FUSE       |
            +-----------------------+  +------------------------+            

            +---------------------------------------------------+
            |            Ceph FS Library (libcephfs)            |
            +---------------------------------------------------+

            +---------------------------------------------------+
            |      Ceph Storage Cluster Protocol (librados)     |
            +---------------------------------------------------+

            +---------------+ +---------------+ +---------------+
            |      OSDs     | |      MDSs     | |    Monitors   |
            +---------------+ +---------------+ +---------------+


Using the Ceph Filesystem requires at least one :term:`Ceph Metadata Server` in
your Ceph Storage Cluster.



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	<table cellpadding="10"><colgroup><col width="33%"><col width="33%"><col width="33%"></colgroup><tbody valign="top"><tr><td><h3>Step 1: Metadata Server</h3>

To run the Ceph Filesystem, you must have a running Ceph Storage Cluster with at
least one :term:`Ceph Metadata Server` running.


.. toctree:: 
	:maxdepth: 1

	Add/Remove MDS <../../rados/deployment/ceph-deploy-mds>
	MDS Configuration <mds-config-ref>
	Journaler Configuration <journaler>
	Manpage ceph-mds <../../man/8/ceph-mds>

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	</td><td><h3>Step 2: Mount Ceph FS</h3>

Once you have a healthy Ceph Storage Cluster with at least
one Ceph Metadata Server, you may create and mount your Ceph Filesystem.
Ensure that you client has network connectivity and the proper
authentication keyring.

.. toctree:: 
	:maxdepth: 1

	Create Ceph FS <createfs>
	Mount Ceph FS <kernel>
	Mount Ceph FS as FUSE <fuse>
	Mount Ceph FS in fstab <fstab>
	Manpage cephfs <../../man/8/cephfs>
	Manpage ceph-fuse <../../man/8/ceph-fuse>
	Manpage mount.ceph <../../man/8/mount.ceph>


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	</td><td><h3>Additional Details</h3>

.. toctree:: 
	:maxdepth: 1

	Using Ceph with Hadoop <hadoop>
	libcephfs <../../api/libcephfs-java/>
	cephfs-journal-tool <cephfs-journal-tool>
	File layouts <file-layouts>
	Client eviction <eviction>
	Handling full filesystems <full>
	Troubleshooting <troubleshooting>
	Disaster recovery <disaster-recovery>

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	</td></tr></tbody></table>