mirror of
https://github.com/ceph/ceph
synced 2024-12-18 09:25:49 +00:00
67ca6cd229
These configs were used for initialization but it is more appropriate to require setting these file system attributes via `ceph fs set`. This is similar to what was already done with max_mds. There are new variables added for `fs set` where missing. Signed-off-by: Patrick Donnelly <pdonnell@redhat.com>
601 lines
13 KiB
ReStructuredText
601 lines
13 KiB
ReStructuredText
======================
|
|
MDS Config Reference
|
|
======================
|
|
|
|
``mon force standby active``
|
|
|
|
:Description: If ``true`` monitors force standby-replay to be active. Set
|
|
under ``[mon]`` or ``[global]``.
|
|
|
|
:Type: Boolean
|
|
:Default: ``true``
|
|
|
|
``mds cache memory limit``
|
|
|
|
:Description: The memory limit the MDS should enforce for its cache.
|
|
Administrators should use this instead of ``mds cache size``.
|
|
:Type: 64-bit Integer Unsigned
|
|
:Default: ``1073741824``
|
|
|
|
``mds cache reservation``
|
|
|
|
:Description: The cache reservation (memory or inodes) for the MDS cache to maintain.
|
|
Once the MDS begins dipping into its reservation, it will recall
|
|
client state until its cache size shrinks to restore the
|
|
reservation.
|
|
:Type: Float
|
|
:Default: ``0.05``
|
|
|
|
``mds cache size``
|
|
|
|
:Description: The number of inodes to cache. A value of 0 indicates an
|
|
unlimited number. It is recommended to use
|
|
``mds_cache_memory_limit`` to limit the amount of memory the MDS
|
|
cache uses.
|
|
:Type: 32-bit Integer
|
|
:Default: ``0``
|
|
|
|
``mds cache mid``
|
|
|
|
:Description: The insertion point for new items in the cache LRU
|
|
(from the top).
|
|
|
|
:Type: Float
|
|
:Default: ``0.7``
|
|
|
|
|
|
``mds dir commit ratio``
|
|
|
|
:Description: The fraction of directory that is dirty before Ceph commits using
|
|
a full update (instead of partial update).
|
|
|
|
:Type: Float
|
|
:Default: ``0.5``
|
|
|
|
|
|
``mds dir max commit size``
|
|
|
|
:Description: The maximum size of a directory update before Ceph breaks it into
|
|
smaller transactions) (MB).
|
|
|
|
:Type: 32-bit Integer
|
|
:Default: ``90``
|
|
|
|
|
|
``mds decay halflife``
|
|
|
|
:Description: The half-life of MDS cache temperature.
|
|
:Type: Float
|
|
:Default: ``5``
|
|
|
|
``mds beacon interval``
|
|
|
|
:Description: The frequency (in seconds) of beacon messages sent
|
|
to the monitor.
|
|
|
|
:Type: Float
|
|
:Default: ``4``
|
|
|
|
|
|
``mds beacon grace``
|
|
|
|
:Description: The interval without beacons before Ceph declares an MDS laggy
|
|
(and possibly replace it).
|
|
|
|
:Type: Float
|
|
:Default: ``15``
|
|
|
|
|
|
``mds blacklist interval``
|
|
|
|
:Description: The blacklist duration for failed MDSs in the OSD map. Note,
|
|
this controls how long failed MDS daemons will stay in the
|
|
OSDMap blacklist. It has no effect on how long something is
|
|
blacklisted when the administrator blacklists it manually. For
|
|
example, ``ceph osd blacklist add`` will still use the default
|
|
blacklist time.
|
|
:Type: Float
|
|
:Default: ``24.0*60.0``
|
|
|
|
|
|
``mds reconnect timeout``
|
|
|
|
:Description: The interval (in seconds) to wait for clients to reconnect
|
|
during MDS restart.
|
|
|
|
:Type: Float
|
|
:Default: ``45``
|
|
|
|
|
|
``mds tick interval``
|
|
|
|
:Description: How frequently the MDS performs internal periodic tasks.
|
|
:Type: Float
|
|
:Default: ``5``
|
|
|
|
|
|
``mds dirstat min interval``
|
|
|
|
:Description: The minimum interval (in seconds) to try to avoid propagating
|
|
recursive stats up the tree.
|
|
|
|
:Type: Float
|
|
:Default: ``1``
|
|
|
|
``mds scatter nudge interval``
|
|
|
|
:Description: How quickly dirstat changes propagate up.
|
|
:Type: Float
|
|
:Default: ``5``
|
|
|
|
|
|
``mds client prealloc inos``
|
|
|
|
:Description: The number of inode numbers to preallocate per client session.
|
|
:Type: 32-bit Integer
|
|
:Default: ``1000``
|
|
|
|
|
|
``mds early reply``
|
|
|
|
:Description: Determines whether the MDS should allow clients to see request
|
|
results before they commit to the journal.
|
|
|
|
:Type: Boolean
|
|
:Default: ``true``
|
|
|
|
|
|
``mds use tmap``
|
|
|
|
:Description: Use trivialmap for directory updates.
|
|
:Type: Boolean
|
|
:Default: ``true``
|
|
|
|
|
|
``mds default dir hash``
|
|
|
|
:Description: The function to use for hashing files across directory fragments.
|
|
:Type: 32-bit Integer
|
|
:Default: ``2`` (i.e., rjenkins)
|
|
|
|
|
|
``mds log skip corrupt events``
|
|
|
|
:Description: Determines whether the MDS should try to skip corrupt journal
|
|
events during journal replay.
|
|
|
|
:Type: Boolean
|
|
:Default: ``false``
|
|
|
|
|
|
``mds log max events``
|
|
|
|
:Description: The maximum events in the journal before we initiate trimming.
|
|
Set to ``-1`` to disable limits.
|
|
|
|
:Type: 32-bit Integer
|
|
:Default: ``-1``
|
|
|
|
|
|
``mds log max segments``
|
|
|
|
:Description: The maximum number of segments (objects) in the journal before
|
|
we initiate trimming. Set to ``-1`` to disable limits.
|
|
|
|
:Type: 32-bit Integer
|
|
:Default: ``30``
|
|
|
|
|
|
``mds log max expiring``
|
|
|
|
:Description: The maximum number of segments to expire in parallels
|
|
:Type: 32-bit Integer
|
|
:Default: ``20``
|
|
|
|
|
|
``mds log eopen size``
|
|
|
|
:Description: The maximum number of inodes in an EOpen event.
|
|
:Type: 32-bit Integer
|
|
:Default: ``100``
|
|
|
|
|
|
``mds bal sample interval``
|
|
|
|
:Description: Determines how frequently to sample directory temperature
|
|
(for fragmentation decisions).
|
|
|
|
:Type: Float
|
|
:Default: ``3``
|
|
|
|
|
|
``mds bal replicate threshold``
|
|
|
|
:Description: The maximum temperature before Ceph attempts to replicate
|
|
metadata to other nodes.
|
|
|
|
:Type: Float
|
|
:Default: ``8000``
|
|
|
|
|
|
``mds bal unreplicate threshold``
|
|
|
|
:Description: The minimum temperature before Ceph stops replicating
|
|
metadata to other nodes.
|
|
|
|
:Type: Float
|
|
:Default: ``0``
|
|
|
|
|
|
``mds bal split size``
|
|
|
|
:Description: The maximum directory size before the MDS will split a directory
|
|
fragment into smaller bits.
|
|
|
|
:Type: 32-bit Integer
|
|
:Default: ``10000``
|
|
|
|
|
|
``mds bal split rd``
|
|
|
|
:Description: The maximum directory read temperature before Ceph splits
|
|
a directory fragment.
|
|
|
|
:Type: Float
|
|
:Default: ``25000``
|
|
|
|
|
|
``mds bal split wr``
|
|
|
|
:Description: The maximum directory write temperature before Ceph splits
|
|
a directory fragment.
|
|
|
|
:Type: Float
|
|
:Default: ``10000``
|
|
|
|
|
|
``mds bal split bits``
|
|
|
|
:Description: The number of bits by which to split a directory fragment.
|
|
:Type: 32-bit Integer
|
|
:Default: ``3``
|
|
|
|
|
|
``mds bal merge size``
|
|
|
|
:Description: The minimum directory size before Ceph tries to merge
|
|
adjacent directory fragments.
|
|
|
|
:Type: 32-bit Integer
|
|
:Default: ``50``
|
|
|
|
|
|
``mds bal interval``
|
|
|
|
:Description: The frequency (in seconds) of workload exchanges between MDSs.
|
|
:Type: 32-bit Integer
|
|
:Default: ``10``
|
|
|
|
|
|
``mds bal fragment interval``
|
|
|
|
:Description: The delay (in seconds) between a fragment being elegible for split
|
|
or merge and executing the fragmentation change.
|
|
:Type: 32-bit Integer
|
|
:Default: ``5``
|
|
|
|
|
|
``mds bal fragment fast factor``
|
|
|
|
:Description: The ratio by which frags may exceed the split size before
|
|
a split is executed immediately (skipping the fragment interval)
|
|
:Type: Float
|
|
:Default: ``1.5``
|
|
|
|
``mds bal fragment size max``
|
|
|
|
:Description: The maximum size of a fragment before any new entries
|
|
are rejected with ENOSPC.
|
|
:Type: 32-bit Integer
|
|
:Default: ``100000``
|
|
|
|
``mds bal idle threshold``
|
|
|
|
:Description: The minimum temperature before Ceph migrates a subtree
|
|
back to its parent.
|
|
|
|
:Type: Float
|
|
:Default: ``0``
|
|
|
|
|
|
``mds bal max``
|
|
|
|
:Description: The number of iterations to run balancer before Ceph stops.
|
|
(used for testing purposes only)
|
|
|
|
:Type: 32-bit Integer
|
|
:Default: ``-1``
|
|
|
|
|
|
``mds bal max until``
|
|
|
|
:Description: The number of seconds to run balancer before Ceph stops.
|
|
(used for testing purposes only)
|
|
|
|
:Type: 32-bit Integer
|
|
:Default: ``-1``
|
|
|
|
|
|
``mds bal mode``
|
|
|
|
:Description: The method for calculating MDS load.
|
|
|
|
- ``0`` = Hybrid.
|
|
- ``1`` = Request rate and latency.
|
|
- ``2`` = CPU load.
|
|
|
|
:Type: 32-bit Integer
|
|
:Default: ``0``
|
|
|
|
|
|
``mds bal min rebalance``
|
|
|
|
:Description: The minimum subtree temperature before Ceph migrates.
|
|
:Type: Float
|
|
:Default: ``0.1``
|
|
|
|
|
|
``mds bal min start``
|
|
|
|
:Description: The minimum subtree temperature before Ceph searches a subtree.
|
|
:Type: Float
|
|
:Default: ``0.2``
|
|
|
|
|
|
``mds bal need min``
|
|
|
|
:Description: The minimum fraction of target subtree size to accept.
|
|
:Type: Float
|
|
:Default: ``0.8``
|
|
|
|
|
|
``mds bal need max``
|
|
|
|
:Description: The maximum fraction of target subtree size to accept.
|
|
:Type: Float
|
|
:Default: ``1.2``
|
|
|
|
|
|
``mds bal midchunk``
|
|
|
|
:Description: Ceph will migrate any subtree that is larger than this fraction
|
|
of the target subtree size.
|
|
|
|
:Type: Float
|
|
:Default: ``0.3``
|
|
|
|
|
|
``mds bal minchunk``
|
|
|
|
:Description: Ceph will ignore any subtree that is smaller than this fraction
|
|
of the target subtree size.
|
|
|
|
:Type: Float
|
|
:Default: ``0.001``
|
|
|
|
|
|
``mds bal target removal min``
|
|
|
|
:Description: The minimum number of balancer iterations before Ceph removes
|
|
an old MDS target from the MDS map.
|
|
|
|
:Type: 32-bit Integer
|
|
:Default: ``5``
|
|
|
|
|
|
``mds bal target removal max``
|
|
|
|
:Description: The maximum number of balancer iteration before Ceph removes
|
|
an old MDS target from the MDS map.
|
|
|
|
:Type: 32-bit Integer
|
|
:Default: ``10``
|
|
|
|
|
|
``mds replay interval``
|
|
|
|
:Description: The journal poll interval when in standby-replay mode.
|
|
("hot standby")
|
|
|
|
:Type: Float
|
|
:Default: ``1``
|
|
|
|
|
|
``mds shutdown check``
|
|
|
|
:Description: The interval for polling the cache during MDS shutdown.
|
|
:Type: 32-bit Integer
|
|
:Default: ``0``
|
|
|
|
|
|
``mds thrash exports``
|
|
|
|
:Description: Ceph will randomly export subtrees between nodes (testing only).
|
|
:Type: 32-bit Integer
|
|
:Default: ``0``
|
|
|
|
|
|
``mds thrash fragments``
|
|
|
|
:Description: Ceph will randomly fragment or merge directories.
|
|
:Type: 32-bit Integer
|
|
:Default: ``0``
|
|
|
|
|
|
``mds dump cache on map``
|
|
|
|
:Description: Ceph will dump the MDS cache contents to a file on each MDSMap.
|
|
:Type: Boolean
|
|
:Default: ``false``
|
|
|
|
|
|
``mds dump cache after rejoin``
|
|
|
|
:Description: Ceph will dump MDS cache contents to a file after
|
|
rejoining the cache (during recovery).
|
|
|
|
:Type: Boolean
|
|
:Default: ``false``
|
|
|
|
|
|
``mds verify scatter``
|
|
|
|
:Description: Ceph will assert that various scatter/gather invariants
|
|
are ``true`` (developers only).
|
|
|
|
:Type: Boolean
|
|
:Default: ``false``
|
|
|
|
|
|
``mds debug scatterstat``
|
|
|
|
:Description: Ceph will assert that various recursive stat invariants
|
|
are ``true`` (for developers only).
|
|
|
|
:Type: Boolean
|
|
:Default: ``false``
|
|
|
|
|
|
``mds debug frag``
|
|
|
|
:Description: Ceph will verify directory fragmentation invariants
|
|
when convenient (developers only).
|
|
|
|
:Type: Boolean
|
|
:Default: ``false``
|
|
|
|
|
|
``mds debug auth pins``
|
|
|
|
:Description: The debug auth pin invariants (for developers only).
|
|
:Type: Boolean
|
|
:Default: ``false``
|
|
|
|
|
|
``mds debug subtrees``
|
|
|
|
:Description: The debug subtree invariants (for developers only).
|
|
:Type: Boolean
|
|
:Default: ``false``
|
|
|
|
|
|
``mds kill mdstable at``
|
|
|
|
:Description: Ceph will inject MDS failure in MDSTable code
|
|
(for developers only).
|
|
|
|
:Type: 32-bit Integer
|
|
:Default: ``0``
|
|
|
|
|
|
``mds kill export at``
|
|
|
|
:Description: Ceph will inject MDS failure in the subtree export code
|
|
(for developers only).
|
|
|
|
:Type: 32-bit Integer
|
|
:Default: ``0``
|
|
|
|
|
|
``mds kill import at``
|
|
|
|
:Description: Ceph will inject MDS failure in the subtree import code
|
|
(for developers only).
|
|
|
|
:Type: 32-bit Integer
|
|
:Default: ``0``
|
|
|
|
|
|
``mds kill link at``
|
|
|
|
:Description: Ceph will inject MDS failure in hard link code
|
|
(for developers only).
|
|
|
|
:Type: 32-bit Integer
|
|
:Default: ``0``
|
|
|
|
|
|
``mds kill rename at``
|
|
|
|
:Description: Ceph will inject MDS failure in the rename code
|
|
(for developers only).
|
|
|
|
:Type: 32-bit Integer
|
|
:Default: ``0``
|
|
|
|
|
|
``mds wipe sessions``
|
|
|
|
:Description: Ceph will delete all client sessions on startup
|
|
(for testing only).
|
|
|
|
:Type: Boolean
|
|
:Default: ``false``
|
|
|
|
|
|
``mds wipe ino prealloc``
|
|
|
|
:Description: Ceph will delete ino preallocation metadata on startup
|
|
(for testing only).
|
|
|
|
:Type: Boolean
|
|
:Default: ``false``
|
|
|
|
|
|
``mds skip ino``
|
|
|
|
:Description: The number of inode numbers to skip on startup
|
|
(for testing only).
|
|
|
|
:Type: 32-bit Integer
|
|
:Default: ``0``
|
|
|
|
|
|
``mds standby for name``
|
|
|
|
:Description: An MDS daemon will standby for another MDS daemon of the name
|
|
specified in this setting.
|
|
|
|
:Type: String
|
|
:Default: N/A
|
|
|
|
|
|
``mds standby for rank``
|
|
|
|
:Description: An MDS daemon will standby for an MDS daemon of this rank.
|
|
:Type: 32-bit Integer
|
|
:Default: ``-1``
|
|
|
|
|
|
``mds standby replay``
|
|
|
|
:Description: Determines whether a ``ceph-mds`` daemon should poll and replay
|
|
the log of an active MDS (hot standby).
|
|
|
|
:Type: Boolean
|
|
:Default: ``false``
|
|
|
|
|
|
``mds min caps per client``
|
|
|
|
:Description: Set the minimum number of capabilities a client may hold.
|
|
:Type: Integer
|
|
:Default: ``100``
|
|
|
|
|
|
``mds max ratio caps per client``
|
|
|
|
:Description: Set the maximum ratio of current caps that may be recalled during MDS cache pressure.
|
|
:Type: Float
|
|
:Default: ``0.8``
|