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https://github.com/ceph/ceph
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8dbc5c9d1c
This parameter has the following 2 advantages: 1. FUSE(version > 2.8) the default single IO write size is 128k (controlled by max_write), if I use bs=4M in the FIO tool test, you will find that 4*1024k/128=32 is needed, ie 32 IO operations are needed . If I adjust max_write to 4M, only one operation is needed, which greatly improves the write performance of cephfs during fuse mount. Of course, the above implementation requires libfuse and kernel fuse to support. 2. In addition, we can also limit the single IO write size by setting max_write to less than 128K. Signed-off-by: huanwen ren <ren.huanwen@zte.com.cn>
221 lines
5.8 KiB
ReStructuredText
221 lines
5.8 KiB
ReStructuredText
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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. Because the FUSE default is 128kbytes, SO fuse_max_write default set to 0(The default does not take effect)
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:Type: Integer
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:Default: ``0``
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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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