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Ceph config option names may use spaces, underscores, or by one reference hyphens as interstitial separators. Most usage within the doc tree uses underscores, though example conf files and especially structured lists of options mostly use spaces. Mostly. Underscores help differentiate the config names from surrounding text, and moreover facilitate scripting, grep, awk, etc and match their form in src/common/options.cc. This PR conforms these occurrences of option names to use interstitial underscores instead of spaces. Fixes: https://tracker.ceph.com/issues/48301 Signed-off-by: Anthony D'Atri <anthony.datri@gmail.com>
262 lines
7.7 KiB
ReStructuredText
262 lines
7.7 KiB
ReStructuredText
Client Configuration
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====================
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Updating Client Configuration
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-----------------------------
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Certain client configurations can be applied at runtime. To check if a configuration option can be applied (taken into affect by a client) at runtime, use the `config help` command::
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ceph config help debug_client
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debug_client - Debug level for client
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(str, advanced) Default: 0/5
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Can update at runtime: true
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The value takes the form 'N' or 'N/M' where N and M are values between 0 and 99. N is the debug level to log (all values below this are included), and M is the level to gather and buffer in memory. In the event of a crash, the most recent items <= M are dumped to the log file.
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`config help` tells if a given configuration can be applied at runtime along with the defaults and a description of the configuration option.
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To update a configuration option at runtime, use the `config set` command::
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ceph config set client debug_client 20/20
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Note that this changes a given configuration for all clients.
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To check configured options use the `config get` command::
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ceph config get client
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WHO MASK LEVEL OPTION VALUE RO
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client advanced debug_client 20/20
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global advanced osd_pool_default_min_size 1
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global advanced osd_pool_default_size 3
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Client Config Reference
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------------------------
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``client_acl_type``
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: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``.
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:Type: String
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:Default: ``""`` (no ACL enforcement)
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``client_cache_mid``
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:Description: Set client cache midpoint. The midpoint splits the least recently used lists into a hot and warm list.
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:Type: Float
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:Default: ``0.75``
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``client_cache_size``
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:Description: Set the number of inodes that the client keeps in the metadata cache.
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:Type: Integer
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:Default: ``16384``
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``client_caps_release_delay``
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: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.
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:Type: Integer
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:Default: ``5`` (seconds)
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``client_debug_force_sync_read``
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:Description: If set to ``true``, clients read data directly from OSDs instead of using a local page cache.
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:Type: Boolean
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:Default: ``false``
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``client_dirsize_rbytes``
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:Description: If set to ``true``, use the recursive size of a directory (that is, total of all descendants).
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:Type: Boolean
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:Default: ``true``
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``client_max_inline_size``
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: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.
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:Type: Integer
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:Default: ``4096``
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``client_metadata``
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:Description: Comma-delimited strings for client metadata sent to each MDS, in addition to the automatically generated version, host name, and other metadata.
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:Type: String
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:Default: ``""`` (no additional metadata)
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``client_mount_gid``
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:Description: Set the group ID of CephFS mount.
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:Type: Integer
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:Default: ``-1``
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``client_mount_timeout``
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:Description: Set the timeout for CephFS mount in seconds.
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:Type: Float
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:Default: ``300.0``
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``client_mount_uid``
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:Description: Set the user ID of CephFS mount.
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:Type: Integer
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:Default: ``-1``
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``client_mountpoint``
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:Description: Directory to mount on the CephFS file system. An alternative to the ``-r`` option of the ``ceph-fuse`` command.
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:Type: String
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:Default: ``"/"``
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``client_oc``
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:Description: Enable object caching.
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:Type: Boolean
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:Default: ``true``
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``client_oc_max_dirty``
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:Description: Set the maximum number of dirty bytes in the object cache.
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:Type: Integer
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:Default: ``104857600`` (100MB)
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``client_oc_max_dirty_age``
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:Description: Set the maximum age in seconds of dirty data in the object cache before writeback.
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:Type: Float
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:Default: ``5.0`` (seconds)
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``client_oc_max_objects``
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:Description: Set the maximum number of objects in the object cache.
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:Type: Integer
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:Default: ``1000``
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``client_oc_size``
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:Description: Set how many bytes of data will the client cache.
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:Type: Integer
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:Default: ``209715200`` (200 MB)
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``client_oc_target_dirty``
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:Description: Set the target size of dirty data. We recommend to keep this number low.
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:Type: Integer
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:Default: ``8388608`` (8MB)
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``client_permissions``
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:Description: Check client permissions on all I/O operations.
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:Type: Boolean
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:Default: ``true``
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``client_quota``
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:Description: Enable client quota checking if set to ``true``.
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:Type: Boolean
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:Default: ``true``
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``client_quota_df``
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:Description: Report root directory quota for the ``statfs`` operation.
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:Type: Boolean
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:Default: ``true``
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``client_readahead_max_bytes``
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:Description: Set the maximum number of bytes that the client reads ahead for future read operations. Overridden by the ``client_readahead_max_periods`` setting.
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:Type: Integer
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:Default: ``0`` (unlimited)
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``client_readahead_max_periods``
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:Description: Set the number of file layout periods (object size * number of stripes) that the client reads ahead. Overrides the ``client_readahead_max_bytes`` setting.
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:Type: Integer
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:Default: ``4``
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``client_readahead_min``
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:Description: Set the minimum number bytes that the client reads ahead.
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:Type: Integer
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:Default: ``131072`` (128KB)
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``client_reconnect_stale``
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:Description: Automatically reconnect stale session.
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:Type: Boolean
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:Default: ``false``
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``client_snapdir``
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:Description: Set the snapshot directory name.
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:Type: String
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:Default: ``".snap"``
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``client_tick_interval``
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:Description: Set the interval in seconds between capability renewal and other upkeep.
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:Type: Float
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:Default: ``1.0`` (seconds)
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``client_use_random_mds``
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:Description: Choose random MDS for each request.
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:Type: Boolean
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:Default: ``false``
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``fuse_default_permissions``
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: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.
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:Type: Boolean
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:Default: ``true``
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``fuse_max_write``
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:Description: Set the maximum number of bytes in a single write operation.
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A value of 0 indicates no change; the
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FUSE default of 128 kbytes remains in force.
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:Type: Integer
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:Default: ``0``
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``fuse_disable_pagecache``
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:Description: If set to ``true``, kernel page cache is disabled for ``ceph-fuse``
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mounts. When multiple clients read/write to a file at the same
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time, readers may get stale data from page cache. Due to
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limitations of FUSE, ``ceph-fuse`` can't disable page cache dynamically.
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:Type: Boolean
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:Default: ``false``
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Developer Options
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#################
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.. important:: These options are internal. They are listed here only to complete the list of options.
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``client_debug_getattr_caps``
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:Description: Check if the reply from the MDS contains required capabilities.
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:Type: Boolean
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:Default: ``false``
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``client_debug_inject_tick_delay``
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:Description: Add artificial delay between client ticks.
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:Type: Integer
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:Default: ``0``
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``client_inject_fixed_oldest_tid``
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:Description:
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:Type: Boolean
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:Default: ``false``
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``client_inject_release_failure``
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:Description:
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:Type: Boolean
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:Default: ``false``
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``client_trace``
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: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>`_.
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:Type: String
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:Default: ``""`` (disabled)
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