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https://github.com/ceph/ceph
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b2ecec6b3a
Several CephFS pages described deprecated commands and features without clear status or replacements, and one page documented an upgrade path that predates every supported release. * cephfs-mirroring: correct the peer_add deprecation note to reference the actual replacement command, peer_bootstrap create, and link the Bootstrap Peers section * kernel-features, experimental-features: state that inline data has been deprecated since the Octopus release and that enabling it triggers a health warning * upgrading: remove the "Upgrading pre-Firefly file systems past Jewel" section; the tmap_upgrade command it referenced was removed in Kraken Fixes: https://tracker.ceph.com/issues/77188 Signed-off-by: Emmanuel Ameh <eameh@contractor.linuxfoundation.org>
48 lines
1.7 KiB
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48 lines
1.7 KiB
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Supported Features of the Kernel Driver
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========================================
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The kernel driver is developed separately from the core Ceph code, and as
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such it sometimes differs from the FUSE driver in feature implementation.
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The following details the implementation status of various CephFS features
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in the kernel driver.
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Inline data
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-----------
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Inline data was introduced by the Firefly release. This feature has been
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deprecated since the Octopus release: enabling it triggers a health warning,
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and it will be removed in a future release.
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Linux kernel clients >= 3.19 can read inline data and convert existing
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inline data to RADOS objects when file data is modified. At present,
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Linux kernel clients do not store file data as inline data.
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See `Experimental Features`_ for more information.
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Quotas
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------
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Quota was first introduced by the Hammer release. Quota disk format got renewed
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by the Mimic release. Linux kernel clients >= 4.17 can support the new format
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quota. At present, no Linux kernel clients support the old format quota.
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See `Quotas`_ for more information.
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Multiple file systems within a Ceph cluster
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-------------------------------------------
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The feature was introduced by the Jewel release. Linux kernel clients >= 4.7
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can support it.
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See `Experimental Features`_ for more information.
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Multiple active metadata servers
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--------------------------------
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The feature has been supported since the Luminous release. It is recommended to
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use Linux kernel clients >= 4.14 when there are multiple active MDS.
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Snapshots
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---------
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The feature has been supported since the Mimic release. It is recommended to
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use Linux kernel clients >= 4.17 if snapshot is used.
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.. _Experimental Features: ../experimental-features
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.. _Quotas: ../quota
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