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ceph/doc/cephfs/journaler.rst
Sage Weil 916d1cf607 doc: journaler config options
Signed-off-by: Sage Weil <sage@inktank.com>
2012-12-26 17:34:12 -08:00

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===========
Journaler
===========
``journaler allow split entries``
:Description: Allow an entry to span a stripe boundary
:Type: Boolean
:Required: No
:Default: ``true``
``journaler write head interval``
:Description: How frequently to update the journal head object
:Type: Integer
:Required: No
:Default: ``15``
``journaler prefetch periods``
:Description: How many stripe periods to read-ahead on journal replay
:Type: Integer
:Required: No
:Default: ``10``
``journal prezero periods``
:Description: How mnay stripe periods to zero ahead of write position
:Type: Integer
:Required: No
:Default: ``10``
``journaler batch interval``
:Description: Maximum additional latency in seconds we incur artificially.
:Type: Double
:Required: No
:Default: ``.001``
``journaler batch max``
:Description: Maximum bytes we'll delay flushing.
:Type: 64-bit Unsigned Integer
:Required: No
:Default: ``0``