mds max file size
| Description: | Maximum allowed file size to set when creating a new file system. |
|---|---|
| Type: | 64-bit Integer Unsigned |
| Default: | 1ULL << 40 |
mds cache size
| Description: | Number of inodes to cache. |
|---|---|
| Type: | 32-bit Integer |
| Default: | 100000 |
mds cache mid
| Description: | Insertion point for new items in the cache LRU (from the top). |
|---|---|
| Type: | Float |
| Default: | 0.7 |
mds dir commit ratio
| Description: | fraction of directory that is dirty before we commit using a full update (intead of partial update) |
|---|---|
| Type: | Float |
| Default: | 0.5 |
mds dir max commit size
| Description: | maximum size of a directory update (before we break it into smaller transactions) (MB) |
|---|---|
| Type: | 32-bit Integer |
| Default: | 90 |
mds decay halflife
| Description: | half-life of mds cache temperature |
|---|---|
| Type: | Float |
| Default: | 5 |
mds beacon interval
| Description: | frequency (in seconds) of beacon messages sent to the monitor |
|---|---|
| Type: | Float |
| Default: | 4 |
mds beacon grace
| Description: | interval of no beacons before we declare an mds laggy (and possibly replace it) |
|---|---|
| Type: | Float |
| Default: | 15 |
mds blacklist interval
| Description: | how long to blacklist failed mds's in the osdmap |
|---|---|
| Type: | Float |
| Default: | 24.0*60.0 |
mds session timeout
| Description: | interval (in seconds) of client inactivity before we time out capabilities and leases |
|---|---|
| Type: | Float |
| Default: | 60 |
mds session autoclose
| Description: | interval (in seconds) before we close a laggy client's session |
|---|---|
| Type: | Float |
| Default: | 300 |
mds reconnect timeout
| Description: | inter (in seconds) to wait for clients to reconnect during mds restart |
|---|---|
| Type: | Float |
| Default: | 45 |
mds tick interval
| Description: | how frequently the mds does internal periodic tasks |
|---|---|
| Type: | Float |
| Default: | 5 |
mds dirstat min interval
| Description: | 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: | number of inode numbers to preallocate per client session |
|---|---|
| Type: | 32-bit Integer |
| Default: | 1000 |
mds early reply
| Description: | 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 dir updates |
|---|---|
| Type: | Boolean |
| Default: | true |
mds default dir hash
| Description: | function to use for hashing files across directory fragments |
|---|---|
| Type: | 32-bit Integer |
| Default: | 2 (rjenkins) |
mds log
| Description: | true if the mds should journal metadata updates (disabled for benchmarking only) |
|---|---|
| Type: | Boolean |
| Default: | true |
mds log skip corrupt events
| Description: | whether the mds should try to skip corrupt journal events during journal replay |
|---|---|
| Type: | Boolean |
| Default: | false |
mds log max events
| Description: | maximum events in the journal before we initiate trimming; -1 to disable limit |
|---|---|
| Type: | 32-bit Integer |
| Default: | -1 |
mds log max segments
| Description: | maximum segments (objects) in the journal before we initiate trimming; -1 to disable limit |
|---|---|
| Type: | 32-bit Integer |
| Default: | 30 |
mds log max expiring
| Description: | maximum number of segments to expire in parallel |
|---|---|
| Type: | 32-bit Integer |
| Default: | 20 |
mds log eopen size
| Description: | maximum number of inodes in an EOpen event |
|---|---|
| Type: | 32-bit Integer |
| Default: | 100 |
mds bal sample interval
| Description: | how frequently to sample directory temperature (for fragmentation decisions) |
|---|---|
| Type: | Float |
| Default: | 3 |
mds bal replicate threshold
| Description: | max temperature before we attempt to replicate metadata to other nodes |
|---|---|
| Type: | Float |
| Default: | 8000 |
mds bal unreplicate threshold
| Description: | min temperature before we stop replicating metadata to other nodes |
|---|---|
| Type: | Float |
| Default: | 0 |
mds bal frag
| Description: | whether the MDS will fragment directories |
|---|---|
| Type: | Boolean |
| Default: | false |
mds bal split size
| Description: | 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: | maximum directory read temperature before we split a directory fragment |
|---|---|
| Type: | Float |
| Default: | 25000 |
mds bal split wr
| Description: | maximum directory write temperature before we split a directory fragment |
|---|---|
| Type: | Float |
| Default: | 10000 |
mds bal split bits
| Description: | number of bits to split a directory fragment by |
|---|---|
| Type: | 32-bit Integer |
| Default: | 3 |
mds bal merge size
| Description: | minimum directory size before we try to merge adjacent directory fragments |
|---|---|
| Type: | 32-bit Integer |
| Default: | 50 |
mds bal merge rd
| Description: | minimum read temperature before we merge adjacent directory fragments |
|---|---|
| Type: | Float |
| Default: | 1000 |
mds bal merge wr
| Description: | minimum write temperature before we merge adjacent directory fragments |
|---|---|
| Type: | Float |
| Default: | 1000 |
mds bal interval
| Description: | frequency (in seconds) of workload exchanges between MDSs |
|---|---|
| Type: | 32-bit Integer |
| Default: | 10 |
mds bal fragment interval
| Description: | frequency (in seconds) of adjusting directory fragmentation |
|---|---|
| Type: | 32-bit Integer |
| Default: | 5 |
mds bal idle threshold
| Description: | minimum temperature before we migrate a subtree back to its parent |
|---|---|
| Type: | Float |
| Default: | 0 |
mds bal max
| Description: | number of iterations to run balancer before we stop (used for testing purposes only) |
|---|---|
| Type: | 32-bit Integer |
| Default: | -1 |
mds bal max until
| Description: | number of seconds to run balancer before we stop (used for testing purposes only) |
|---|---|
| Type: | 32-bit Integer |
| Default: | -1 |
mds bal mode
| Description: | method for calculating MDS load (1 = hybrid, 2 = request rate and latency, 3 = cpu load) |
|---|---|
| Type: | 32-bit Integer |
| Default: | 0 |
mds bal min rebalance
| Description: | minimum subtree temperature before we migrate |
|---|---|
| Type: | Float |
| Default: | 0.1 |
mds bal min start
| Description: | minimum subtree temperature before we search a subtree |
|---|---|
| Type: | Float |
| Default: | 0.2 |
mds bal need min
| Description: | minimum fraction of target subtree size to accept |
|---|---|
| Type: | Float |
| Default: | 0.8 |
mds bal need max
| Description: | maximum fraction of target subtree size to accept |
|---|---|
| Type: | Float |
| Default: | 1.2 |
mds bal midchunk
| Description: | migrate any subtree that is larger than this fraction of the target subtree size |
|---|---|
| Type: | Float |
| Default: | 0.3 |
mds bal minchunk
| Description: | 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: | min number of balancer iterations before an old MDS target is removed from the mdsmap |
|---|---|
| Type: | 32-bit Integer |
| Default: | 5 |
mds bal target removal max
| Description: | max number of balancer iteration before an old MDS target is removed from the mdsmap |
|---|---|
| Type: | 32-bit Integer |
| Default: | 10 |
mds replay interval
| Description: | journal poll interval when in standby-replay ("hot standby") mode |
|---|---|
| Type: | Float |
| Default: | 1 |
mds shutdown check
| Description: | interval for polling cache during MDS shutdown |
|---|---|
| Type: | 32-bit Integer |
| Default: | 0 |
mds thrash exports
| Description: | randomly export subtrees between nodes (testing only) |
|---|---|
| Type: | 32-bit Integer |
| Default: | 0 |
mds thrash fragments
| Description: | randomly fragment or merge directories |
|---|---|
| Type: | 32-bit Integer |
| Default: | 0 |
mds dump cache on map
| Description: | dump mds cache contents to a file on each MDSMap |
|---|---|
| Type: | Boolean |
| Default: | false |
mds dump cache after rejoin
| Description: | dump mds cache contents to a file after rejoining cache (during recovery) |
|---|---|
| Type: | Boolean |
| Default: | false |
mds verify scatter
| Description: | assert that various scatter/gather invariants are true (dev only) |
|---|---|
| Type: | Boolean |
| Default: | false |
mds debug scatterstat
| Description: | assert that various recursive stat invariants are true (dev only |
|---|---|
| Type: | Boolean |
| Default: | false |
mds debug frag
| Description: | verify directory fragmentation invariants when convenient (dev only) |
|---|---|
| Type: | Boolean |
| Default: | false |
mds debug auth pins
| Description: | debug auth pin invariants (dev only) |
|---|---|
| Type: | Boolean |
| Default: | false |
mds debug subtrees
| Description: | debug subtree invariants (dev only) |
|---|---|
| Type: | Boolean |
| Default: | false |
mds kill mdstable at
| Description: | inject mds failure in MDSTable code (dev only) |
|---|---|
| Type: | 32-bit Integer |
| Default: | 0 |
mds kill export at
| Description: | inject mds failure in subtree export code (dev only) |
|---|---|
| Type: | 32-bit Integer |
| Default: | 0 |
mds kill import at
| Description: | inject mds failure in subtree import code (dev only) |
|---|---|
| Type: | 32-bit Integer |
| Default: | 0 |
mds kill link at
| Description: | inject mds failure in hard link code (dev only) |
|---|---|
| Type: | 32-bit Integer |
| Default: | 0 |
mds kill rename at
| Description: | inject mds failure in rename code (dev only) |
|---|---|
| Type: | 32-bit Integer |
| Default: | 0 |
mds wipe sessions
| Description: | delete all client sessions on startup (testing only) |
|---|---|
| Type: | Boolean |
| Default: | 0 |
mds wipe ino prealloc
| Description: | delete ino preallocation metadata on startup (testing only) |
|---|---|
| Type: | Boolean |
| Default: | 0 |
mds skip ino
| Description: | number of inode numbers to skip on startup (testing only) |
|---|---|
| Type: | 32-bit Integer |
| Default: | 0 |
mds standby for name
| Description: | name of MDS for a ceph-mds daemon to standby for |
|---|---|
| Type: | String |
| Default: |
mds standby for rank
| Description: | rank of MDS for a ceph-mds daemon to standby for |
|---|---|
| Type: | 32-bit Integer |
| Default: | -1 |
mds standby replay
| Description: | whether a ceph-mds should poll and replay the log an active mds (hot standby) |
|---|---|
| Type: | Boolean |
| Default: | false |