Client Config Reference

client acl type

Description:Set the ACL type. Currently, only possible value is "posix_acl" to enable POSIX ACL, or an empty string. This option only takes effect when the fuse_default_permissions is set to false.
Type:String
Default:"" (no ACL enforcement)

client cache mid

Description:Set client cache midpoint. The midpoint splits the least recently used lists into a hot and warm list.
Type:Float
Default:0.75

client_cache_size

Description:Set the number of inodes that the client keeps in the metadata cache.
Type:Integer
Default:16384

client_caps_release_delay

Description:Set the delay between capability releases in seconds. The delay sets how many seconds a client waits to release capabilities that it no longer needs in case the capabilities are needed for another user space operation.
Type:Integer
Default:5 (seconds)

client_debug_force_sync_read

Description:If set to true, clients read data directly from OSDs instead of using a local page cache.
Type:Boolean
Default:false

client_dirsize_rbytes

Description:If set to true, use the recursive size of a directory (that is, total of all descendants).
Type:Boolean
Default:true

client_max_inline_size

Description:Set the maximum size of inlined data stored in a file inode rather than in a separate data object in RADOS. This setting only applies if the inline_data flag is set on the MDS map.
Type:Integer
Default:4096

client_metadata

Description:Comma-delimited strings for client metadata sent to each MDS, in addition to the automatically generated version, host name, and other metadata.
Type:String
Default:"" (no additional metadata)

client_mount_gid

Description:Set the group ID of CephFS mount.
Type:Integer
Default:-1

client_mount_timeout

Description:Set the timeout for CephFS mount in seconds.
Type:Float
Default:300.0

client_mount_uid

Description:Set the user ID of CephFS mount.
Type:Integer
Default:-1

client_mountpoint

Description:Directory to mount on the CephFS file system. An alternative to the -r option of the ceph-fuse command.
Type:String
Default:"/"

client_oc

Description:Enable object caching.
Type:Boolean
Default:true

client_oc_max_dirty

Description:Set the maximum number of dirty bytes in the object cache.
Type:Integer
Default:104857600 (100MB)

client_oc_max_dirty_age

Description:Set the maximum age in seconds of dirty data in the object cache before writeback.
Type:Float
Default:5.0 (seconds)

client_oc_max_objects

Description:Set the maximum number of objects in the object cache.
Type:Integer
Default:1000

client_oc_size

Description:Set how many bytes of data will the client cache.
Type:Integer
Default:209715200 (200 MB)

client_oc_target_dirty

Description:Set the target size of dirty data. We recommend to keep this number low.
Type:Integer
Default:8388608 (8MB)

client_permissions

Description:Check client permissions on all I/O operations.
Type:Boolean
Default:true

client_quota

Description:Enable client quota checking if set to true.
Type:Boolean
Default:true

client_quota_df

Description:Report root directory quota for the statfs operation.
Type:Boolean
Default:true

client_readahead_max_bytes

Description:Set the maximum number of bytes that the kernel reads ahead for future read operations. Overridden by the client_readahead_max_periods setting.
Type:Integer
Default:0 (unlimited)

client_readahead_max_periods

Description:Set the number of file layout periods (object size * number of stripes) that the kernel reads ahead. Overrides the client_readahead_max_bytes setting.
Type:Integer
Default:4

client_readahead_min

Description:Set the minimum number bytes that the kernel reads ahead.
Type:Integer
Default:131072 (128KB)

client_snapdir

Description:Set the snapshot directory name.
Type:String
Default:".snap"

client_tick_interval

Description:Set the interval in seconds between capability renewal and other upkeep.
Type:Float
Default:1.0 (seconds)

client_use_random_mds

Description:Choose random MDS for each request.
Type:Boolean
Default:false

fuse_default_permissions

Description:When set to false, ceph-fuse utility checks does its own permissions checking, instead of relying on the permissions enforcement in FUSE. Set to false together with the client acl type=posix_acl option to enable POSIX ACL.
Type:Boolean
Default:true

Developer Options

Important

These options are internal. They are listed here only to complete the list of options.

client_debug_getattr_caps

Description:Check if the reply from the MDS contains required capabilities.
Type:Boolean
Default:false

client_debug_inject_tick_delay

Description:Add artificial delay between client ticks.
Type:Integer
Default:0

client_inject_fixed_oldest_tid

Description:
Type:Boolean
Default:false

client_inject_release_failure

Description:
Type:Boolean
Default:false

client_trace

Description:The path to the trace file for all file operations. The output is designed to be used by the Ceph synthetic client <../man/8/ceph-syn>.
Type:String
Default:"" (disabled)