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-
-CephFS best practices
-=====================
-
-This guide provides recommendations for best results when deploying CephFS.
-
-For the actual configuration guide for CephFS, please see the instructions
-at :doc:`/cephfs/index`.
-
-Which Ceph version?
--------------------
-
-Use at least the Jewel (v10.2.0) release of Ceph.  This is the first
-release to include stable CephFS code and fsck/repair tools.  Make sure
-you are using the latest point release to get bug fixes.
-
-Note that Ceph releases do not include a kernel, this is versioned
-and released separately.  See below for guidance of choosing an
-appropriate kernel version if you are using the kernel client
-for CephFS.
-
-Most stable configuration
--------------------------
-
-Some features in CephFS are still experimental.  See
-:doc:`/cephfs/experimental-features` for guidance on these.
-
-For the best chance of a happy healthy filesystem, use a **single active MDS** 
-and **do not use snapshots**.  Both of these are the default.
-
-Note that creating multiple MDS daemons is fine, as these will simply be
-used as standbys.  However, for best stability you should avoid
-adjusting ``max_mds`` upwards, as this would cause multiple
-daemons to be active at once.
-
-Which client?
--------------
-
-The fuse client is the easiest way to get up to date code, while
-the kernel client will often give better performance.
-
-The clients do not always provide equivalent functionality, for example
-the fuse client supports client-enforced quotas while the kernel client
-does not.
-
-When encountering bugs or performance issues, it is often instructive to
-try using the other client, in order to find out whether the bug was
-client-specific or not (and then to let the developers know).
-
-Which kernel version?
-~~~~~~~~~~~~~~~~~~~~~
-
-Because the kernel client is distributed as part of the linux kernel (not
-as part of packaged ceph releases),
-you will need to consider which kernel version to use on your client nodes.
-Older kernels are known to include buggy ceph clients, and may not support
-features that more recent Ceph clusters support.
-
-Remember that the "latest" kernel in a stable linux distribution is likely
-to be years behind the latest upstream linux kernel where Ceph development
-takes place (including bug fixes).
-
-As a rough guide, as of Ceph 10.x (Jewel), you should be using a least a
-4.x kernel.  If you absolutely have to use an older kernel, you should use
-the fuse client instead of the kernel client.
-
-This advice does not apply if you are using a linux distribution that
-includes CephFS support, as in this case the distributor will be responsible
-for backporting fixes to their stable kernel: check with your vendor.
-
-Reporting issues
-----------------
-
-If you have identified a specific issue, please report it with as much
-information as possible.  Especially important information:
-
-* Ceph versions installed on client and server
-* Whether you are using the kernel or fuse client
-* If you are using the kernel client, what kernel version?
-* How many clients are in play, doing what kind of workload?
-* If a system is 'stuck', is that affecting all clients or just one?
-* Any ceph health messages
-* Any backtraces in the ceph logs from crashes
-
-If you are satisfied that you have found a bug, please file it on
-http://tracker.ceph.com.  For more general queries please write
-to the ceph-users mailing list.
-