mds_cache_memory_limit
Description: | The memory limit the MDS should enforce for its cache. |
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Type: | 64-bit Integer Unsigned |
Default: | 4G |
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. |
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Type: | Float |
Default: | 0.05 |
mds_cache_mid
Description: | The insertion point for new items in the cache LRU (from the top). |
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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). |
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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). |
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Type: | 32-bit Integer |
Default: | 10 |
mds_dir_max_entries
Description: | The maximum number of entries before any new entries are rejected with ENOSPC. |
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Type: | 64-bit Integer Unsigned |
Default: | 0 |
mds_decay_halflife
Description: | The half-life of MDS cache temperature. |
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Type: | Float |
Default: | 5 |
mds_beacon_interval
Description: | The frequency (in seconds) of beacon messages sent to the monitor. |
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Type: | Float |
Default: | 4 |
mds_beacon_grace
Description: | The interval without beacons before Ceph declares an MDS laggy (and possibly replace it). |
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Type: | Float |
Default: | 15 |
mds_blocklist_interval
Description: | The blocklist duration for failed MDSs in the OSD map. Note,
this controls how long failed MDS daemons will stay in the
OSDMap blocklist. It has no effect on how long something is
blocklisted when the administrator blocklists it manually. For
example, ceph osd blocklist add will still use the default
blocklist time. |
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Type: | Float |
Default: | 24.0*60.0 |
mds_reconnect_timeout
Description: | The interval (in seconds) to wait for clients to reconnect during MDS restart. |
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Type: | Float |
Default: | 45 |
mds_tick_interval
Description: | How frequently the MDS performs internal periodic tasks. |
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Type: | Float |
Default: | 5 |
mds_dirstat_min_interval
Description: | The minimum interval (in seconds) to try to avoid propagating recursive stats up the tree. |
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Type: | Float |
Default: | 1 |
mds_scatter_nudge_interval
Description: | How quickly dirstat changes propagate up. |
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Type: | Float |
Default: | 5 |
mds_client_prealloc_inos
Description: | The number of inode numbers to preallocate per client session. |
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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. |
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Type: | Boolean |
Default: | true |
mds_default_dir_hash
Description: | The function to use for hashing files across directory fragments. |
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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. |
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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. |
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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. |
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Type: | 32-bit Integer |
Default: | 128 |
mds_bal_sample_interval
Description: | Determines how frequently to sample directory temperature (for fragmentation decisions). |
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Type: | Float |
Default: | 3 |
mds_bal_replicate_threshold
Description: | The maximum temperature before Ceph attempts to replicate metadata to other nodes. |
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Type: | Float |
Default: | 8000 |
mds_bal_unreplicate_threshold
Description: | The minimum temperature before Ceph stops replicating metadata to other nodes. |
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Type: | Float |
Default: | 0 |
mds_bal_split_size
Description: | The maximum directory size before the MDS will split a directory fragment into smaller bits. |
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Type: | 32-bit Integer |
Default: | 10000 |
mds_bal_split_rd
Description: | The maximum directory read temperature before Ceph splits a directory fragment. |
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Type: | Float |
Default: | 25000 |
mds_bal_split_wr
Description: | The maximum directory write temperature before Ceph splits a directory fragment. |
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Type: | Float |
Default: | 10000 |
mds_bal_split_bits
Description: | The number of bits by which to split a directory fragment. |
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Type: | 32-bit Integer |
Default: | 3 |
mds_bal_merge_size
Description: | The minimum directory size before Ceph tries to merge adjacent directory fragments. |
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Type: | 32-bit Integer |
Default: | 50 |
mds_bal_interval
Description: | The frequency (in seconds) of workload exchanges between MDSs. |
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Type: | 32-bit Integer |
Default: | 10 |
mds_bal_fragment_interval
Description: | The delay (in seconds) between a fragment being eligible for split or merge and executing the fragmentation change. |
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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) |
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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. |
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Type: | 32-bit Integer |
Default: | 100000 |
mds_bal_idle_threshold
Description: | The minimum temperature before Ceph migrates a subtree back to its parent. |
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Type: | Float |
Default: | 0 |
mds_bal_max
Description: | The number of iterations to run balancer before Ceph stops. (used for testing purposes only) |
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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) |
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Type: | 32-bit Integer |
Default: | -1 |
mds_bal_mode
Description: | The method for calculating MDS load.
|
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Type: | 32-bit Integer |
Default: |
|
mds_bal_min_rebalance
Description: | The minimum subtree temperature before Ceph migrates. |
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Type: | Float |
Default: | 0.1 |
mds_bal_min_start
Description: | The minimum subtree temperature before Ceph searches a subtree. |
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Type: | Float |
Default: | 0.2 |
mds_bal_need_min
Description: | The minimum fraction of target subtree size to accept. |
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Type: | Float |
Default: | 0.8 |
mds_bal_need_max
Description: | The maximum fraction of target subtree size to accept. |
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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. |
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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. |
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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. |
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Type: | 32-bit Integer |
Default: | 5 |
mds_bal_target_removal_max
Description: | The maximum number of balancer iterations before Ceph removes an old MDS target from the MDS map. |
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Type: | 32-bit Integer |
Default: | 10 |
mds_replay_interval
Description: | The journal poll interval when in standby-replay mode. ("hot standby") |
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Type: | Float |
Default: | 1 |
mds_shutdown_check
Description: | The interval for polling the cache during MDS shutdown. |
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Type: | 32-bit Integer |
Default: | 0 |
mds_thrash_exports
Description: | Ceph will randomly export subtrees between nodes (testing only). |
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Type: | 32-bit Integer |
Default: | 0 |
mds_thrash_fragments
Description: | Ceph will randomly fragment or merge directories. |
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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. |
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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). |
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Type: | Boolean |
Default: | false |
mds_verify_scatter
Description: | Ceph will assert that various scatter/gather invariants
are true (developers only). |
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Type: | Boolean |
Default: | false |
mds_debug_scatterstat
Description: | Ceph will assert that various recursive stat invariants
are true (for developers only). |
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Type: | Boolean |
Default: | false |
mds_debug_frag
Description: | Ceph will verify directory fragmentation invariants when convenient (developers only). |
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Type: | Boolean |
Default: | false |
mds_debug_auth_pins
Description: | The debug auth pin invariants (for developers only). |
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Type: | Boolean |
Default: | false |
mds_debug_subtrees
Description: | The debug subtree invariants (for developers only). |
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Type: | Boolean |
Default: | false |
mds_kill_mdstable_at
Description: | Ceph will inject MDS failure in MDSTable code (for developers only). |
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Type: | 32-bit Integer |
Default: | 0 |
mds_kill_export_at
Description: | Ceph will inject MDS failure in the subtree export code (for developers only). |
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Type: | 32-bit Integer |
Default: | 0 |
mds_kill_import_at
Description: | Ceph will inject MDS failure in the subtree import code (for developers only). |
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Type: | 32-bit Integer |
Default: | 0 |
mds_kill_link_at
Description: | Ceph will inject MDS failure in hard link code (for developers only). |
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Type: | 32-bit Integer |
Default: | 0 |
mds_kill_rename_at
Description: | Ceph will inject MDS failure in the rename code (for developers only). |
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Type: | 32-bit Integer |
Default: | 0 |
mds_inject_skip_replaying_inotable
Description: | Ceph will skip replaying the inotable when replaying the journal, and the premary MDS will crash, while the replacing MDS won't. (for developers only). |
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Type: | Boolean |
Default: | false |
mds_kill_skip_replaying_inotable
Description: | Ceph will skip replaying the inotable when replaying the journal, and the premary MDS will crash, while the replacing MDS won't. (for developers only). |
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Type: | Boolean |
Default: | false |
mds_wipe_sessions
Description: | Ceph will delete all client sessions on startup (for testing only). |
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Type: | Boolean |
Default: | false |
mds_wipe_ino_prealloc
Description: | Ceph will delete ino preallocation metadata on startup (for testing only). |
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Type: | Boolean |
Default: | false |
mds_skip_ino
Description: | The number of inode numbers to skip on startup (for testing only). |
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Type: | 32-bit Integer |
Default: | 0 |
mds_min_caps_per_client
Description: | Set the minimum number of capabilities a client may hold. |
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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. |
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Type: | Float |
Default: | 0.8 |