mirror of
https://github.com/ceph/ceph
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3e72a58698
Also drop options that not exists on code: * mds_log_max_expiring * mds_log_eopen_size Signed-off-by: Konstantin Shalygin <k0ste@k0ste.ru>
580 lines
12 KiB
ReStructuredText
580 lines
12 KiB
ReStructuredText
======================
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MDS Config Reference
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======================
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``mon force standby active``
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:Description: If ``true`` monitors force standby-replay to be active. Set
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under ``[mon]`` or ``[global]``.
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:Type: Boolean
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:Default: ``true``
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``mds cache memory limit``
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:Description: The memory limit the MDS should enforce for its cache.
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Administrators should use this instead of ``mds cache size``.
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:Type: 64-bit Integer Unsigned
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:Default: ``1073741824``
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``mds cache reservation``
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:Description: The cache reservation (memory or inodes) for the MDS cache to maintain.
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Once the MDS begins dipping into its reservation, it will recall
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client state until its cache size shrinks to restore the
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reservation.
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:Type: Float
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:Default: ``0.05``
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``mds cache size``
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:Description: The number of inodes to cache. A value of 0 indicates an
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unlimited number. It is recommended to use
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``mds_cache_memory_limit`` to limit the amount of memory the MDS
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cache uses.
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:Type: 32-bit Integer
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:Default: ``0``
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``mds cache mid``
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:Description: The insertion point for new items in the cache LRU
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(from the top).
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:Type: Float
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:Default: ``0.7``
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``mds dir commit ratio``
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:Description: The fraction of directory that is dirty before Ceph commits using
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a full update (instead of partial update).
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:Type: Float
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:Default: ``0.5``
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``mds dir max commit size``
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:Description: The maximum size of a directory update before Ceph breaks it into
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smaller transactions) (MB).
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:Type: 32-bit Integer
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:Default: ``90``
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``mds decay halflife``
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:Description: The half-life of MDS cache temperature.
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:Type: Float
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:Default: ``5``
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``mds beacon interval``
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:Description: The frequency (in seconds) of beacon messages sent
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to the monitor.
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:Type: Float
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:Default: ``4``
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``mds beacon grace``
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:Description: The interval without beacons before Ceph declares an MDS laggy
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(and possibly replace it).
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:Type: Float
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:Default: ``15``
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``mds blacklist interval``
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:Description: The blacklist duration for failed MDSs in the OSD map. Note,
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this controls how long failed MDS daemons will stay in the
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OSDMap blacklist. It has no effect on how long something is
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blacklisted when the administrator blacklists it manually. For
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example, ``ceph osd blacklist add`` will still use the default
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blacklist time.
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:Type: Float
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:Default: ``24.0*60.0``
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``mds reconnect timeout``
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:Description: The interval (in seconds) to wait for clients to reconnect
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during MDS restart.
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:Type: Float
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:Default: ``45``
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``mds tick interval``
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:Description: How frequently the MDS performs internal periodic tasks.
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:Type: Float
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:Default: ``5``
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``mds dirstat min interval``
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:Description: The minimum interval (in seconds) to try to avoid propagating
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recursive stats up the tree.
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:Type: Float
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:Default: ``1``
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``mds scatter nudge interval``
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:Description: How quickly dirstat changes propagate up.
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:Type: Float
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:Default: ``5``
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``mds client prealloc inos``
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:Description: The number of inode numbers to preallocate per client session.
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:Type: 32-bit Integer
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:Default: ``1000``
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``mds early reply``
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:Description: Determines whether the MDS should allow clients to see request
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results before they commit to the journal.
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:Type: Boolean
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:Default: ``true``
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``mds default dir hash``
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:Description: The function to use for hashing files across directory fragments.
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:Type: 32-bit Integer
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:Default: ``2`` (i.e., rjenkins)
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``mds log skip corrupt events``
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:Description: Determines whether the MDS should try to skip corrupt journal
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events during journal replay.
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:Type: Boolean
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:Default: ``false``
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``mds log max events``
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:Description: The maximum events in the journal before we initiate trimming.
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Set to ``-1`` to disable limits.
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:Type: 32-bit Integer
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:Default: ``-1``
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``mds log max segments``
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:Description: The maximum number of segments (objects) in the journal before
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we initiate trimming. Set to ``-1`` to disable limits.
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:Type: 32-bit Integer
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:Default: ``128``
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``mds bal sample interval``
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:Description: Determines how frequently to sample directory temperature
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(for fragmentation decisions).
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:Type: Float
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:Default: ``3``
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``mds bal replicate threshold``
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:Description: The maximum temperature before Ceph attempts to replicate
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metadata to other nodes.
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:Type: Float
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:Default: ``8000``
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``mds bal unreplicate threshold``
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:Description: The minimum temperature before Ceph stops replicating
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metadata to other nodes.
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:Type: Float
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:Default: ``0``
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``mds bal split size``
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:Description: The maximum directory size before the MDS will split a directory
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fragment into smaller bits.
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:Type: 32-bit Integer
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:Default: ``10000``
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``mds bal split rd``
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:Description: The maximum directory read temperature before Ceph splits
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a directory fragment.
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:Type: Float
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:Default: ``25000``
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``mds bal split wr``
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:Description: The maximum directory write temperature before Ceph splits
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a directory fragment.
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:Type: Float
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:Default: ``10000``
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``mds bal split bits``
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:Description: The number of bits by which to split a directory fragment.
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:Type: 32-bit Integer
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:Default: ``3``
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``mds bal merge size``
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:Description: The minimum directory size before Ceph tries to merge
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adjacent directory fragments.
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:Type: 32-bit Integer
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:Default: ``50``
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``mds bal interval``
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:Description: The frequency (in seconds) of workload exchanges between MDSs.
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:Type: 32-bit Integer
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:Default: ``10``
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``mds bal fragment interval``
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:Description: The delay (in seconds) between a fragment being eligible for split
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or merge and executing the fragmentation change.
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:Type: 32-bit Integer
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:Default: ``5``
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``mds bal fragment fast factor``
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:Description: The ratio by which frags may exceed the split size before
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a split is executed immediately (skipping the fragment interval)
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:Type: Float
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:Default: ``1.5``
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``mds bal fragment size max``
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:Description: The maximum size of a fragment before any new entries
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are rejected with ENOSPC.
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:Type: 32-bit Integer
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:Default: ``100000``
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``mds bal idle threshold``
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:Description: The minimum temperature before Ceph migrates a subtree
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back to its parent.
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:Type: Float
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:Default: ``0``
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``mds bal max``
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:Description: The number of iterations to run balancer before Ceph stops.
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(used for testing purposes only)
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:Type: 32-bit Integer
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:Default: ``-1``
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``mds bal max until``
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:Description: The number of seconds to run balancer before Ceph stops.
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(used for testing purposes only)
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:Type: 32-bit Integer
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:Default: ``-1``
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``mds bal mode``
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:Description: The method for calculating MDS load.
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- ``0`` = Hybrid.
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- ``1`` = Request rate and latency.
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- ``2`` = CPU load.
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:Type: 32-bit Integer
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:Default: ``0``
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``mds bal min rebalance``
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:Description: The minimum subtree temperature before Ceph migrates.
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:Type: Float
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:Default: ``0.1``
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``mds bal min start``
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:Description: The minimum subtree temperature before Ceph searches a subtree.
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:Type: Float
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:Default: ``0.2``
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``mds bal need min``
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:Description: The minimum fraction of target subtree size to accept.
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:Type: Float
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:Default: ``0.8``
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``mds bal need max``
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:Description: The maximum fraction of target subtree size to accept.
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:Type: Float
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:Default: ``1.2``
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``mds bal midchunk``
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:Description: Ceph will migrate any subtree that is larger than this fraction
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of the target subtree size.
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:Type: Float
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:Default: ``0.3``
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``mds bal minchunk``
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:Description: Ceph will ignore any subtree that is smaller than this fraction
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of the target subtree size.
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:Type: Float
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:Default: ``0.001``
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``mds bal target removal min``
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:Description: The minimum number of balancer iterations before Ceph removes
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an old MDS target from the MDS map.
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:Type: 32-bit Integer
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:Default: ``5``
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``mds bal target removal max``
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:Description: The maximum number of balancer iteration before Ceph removes
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an old MDS target from the MDS map.
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:Type: 32-bit Integer
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:Default: ``10``
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``mds replay interval``
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:Description: The journal poll interval when in standby-replay mode.
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("hot standby")
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:Type: Float
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:Default: ``1``
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``mds shutdown check``
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:Description: The interval for polling the cache during MDS shutdown.
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:Type: 32-bit Integer
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:Default: ``0``
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``mds thrash exports``
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:Description: Ceph will randomly export subtrees between nodes (testing only).
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:Type: 32-bit Integer
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:Default: ``0``
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``mds thrash fragments``
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:Description: Ceph will randomly fragment or merge directories.
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:Type: 32-bit Integer
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:Default: ``0``
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``mds dump cache on map``
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:Description: Ceph will dump the MDS cache contents to a file on each MDSMap.
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:Type: Boolean
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:Default: ``false``
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``mds dump cache after rejoin``
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:Description: Ceph will dump MDS cache contents to a file after
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rejoining the cache (during recovery).
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:Type: Boolean
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:Default: ``false``
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``mds verify scatter``
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:Description: Ceph will assert that various scatter/gather invariants
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are ``true`` (developers only).
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:Type: Boolean
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:Default: ``false``
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``mds debug scatterstat``
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:Description: Ceph will assert that various recursive stat invariants
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are ``true`` (for developers only).
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:Type: Boolean
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:Default: ``false``
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``mds debug frag``
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:Description: Ceph will verify directory fragmentation invariants
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when convenient (developers only).
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:Type: Boolean
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:Default: ``false``
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``mds debug auth pins``
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:Description: The debug auth pin invariants (for developers only).
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:Type: Boolean
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:Default: ``false``
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``mds debug subtrees``
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:Description: The debug subtree invariants (for developers only).
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:Type: Boolean
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:Default: ``false``
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``mds kill mdstable at``
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:Description: Ceph will inject MDS failure in MDSTable code
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(for developers only).
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:Type: 32-bit Integer
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:Default: ``0``
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``mds kill export at``
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:Description: Ceph will inject MDS failure in the subtree export code
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(for developers only).
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:Type: 32-bit Integer
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:Default: ``0``
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``mds kill import at``
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:Description: Ceph will inject MDS failure in the subtree import code
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(for developers only).
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:Type: 32-bit Integer
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:Default: ``0``
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``mds kill link at``
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:Description: Ceph will inject MDS failure in hard link code
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(for developers only).
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:Type: 32-bit Integer
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:Default: ``0``
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``mds kill rename at``
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:Description: Ceph will inject MDS failure in the rename code
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(for developers only).
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:Type: 32-bit Integer
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:Default: ``0``
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``mds wipe sessions``
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:Description: Ceph will delete all client sessions on startup
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(for testing only).
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:Type: Boolean
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:Default: ``false``
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``mds wipe ino prealloc``
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:Description: Ceph will delete ino preallocation metadata on startup
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(for testing only).
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:Type: Boolean
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:Default: ``false``
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``mds skip ino``
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:Description: The number of inode numbers to skip on startup
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(for testing only).
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:Type: 32-bit Integer
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:Default: ``0``
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``mds standby for name``
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:Description: An MDS daemon will standby for another MDS daemon of the name
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specified in this setting.
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:Type: String
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:Default: N/A
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``mds standby for rank``
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:Description: An MDS daemon will standby for an MDS daemon of this rank.
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:Type: 32-bit Integer
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:Default: ``-1``
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``mds standby replay``
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:Description: Determines whether a ``ceph-mds`` daemon should poll and replay
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the log of an active MDS (hot standby).
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:Type: Boolean
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:Default: ``false``
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``mds min caps per client``
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:Description: Set the minimum number of capabilities a client may hold.
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:Type: Integer
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:Default: ``100``
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``mds max ratio caps per client``
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:Description: Set the maximum ratio of current caps that may be recalled during MDS cache pressure.
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:Type: Float
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:Default: ``0.8``
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