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===========
MDS Service
===========
.. _orchestrator-cli-cephfs:
Deploy CephFS
=============
One or more MDS daemons is required to use the :term:`CephFS` file system.
These are created automatically if the newer ``ceph fs volume``
interface is used to create a new file system. For more information,
see :ref:`fs-volumes-and-subvolumes`.
For example:
.. prompt:: bash #
ceph fs volume create <fs_name> --placement="<placement spec>"
where ``fs_name`` is the name of the CephFS and ``placement`` is a
:ref:`orchestrator-cli-placement-spec`.
For manually deploying MDS daemons, use this specification:
.. code-block:: yaml
service_type: mds
service_id: fs_name
placement:
count: 3
The specification can then be applied using:
.. prompt:: bash #
ceph orch apply -i mds.yaml
See :ref:`orchestrator-cli-stateless-services` for manually deploying
MDS daemons on the CLI.
Further Reading
===============
* :ref:`ceph-file-system`
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