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423 lines
9.2 KiB
ReStructuredText
423 lines
9.2 KiB
ReStructuredText
======================
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OSD Config Reference
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======================
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``osd uuid``
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:Description: The universally unique identifier (UUID) for the OSD.
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:Type: UUID
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:Default: None
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``osd data``
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:Description: The path to the OSDs data. You must create the directory. You should mount a data disk at this mount point. We do not recommend changing the default.
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:Type: String
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:Default: ``/var/lib/ceph/osd/$cluster-$id``
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``osd journal``
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:Description: The path to the OSD's journal.You must create the directory. You may mount a separate disk here to separate journal data from OSD data.
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:Type: String
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:Default: ``/var/lib/ceph/osd/$cluster-$id/journal``
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``osd journal size``
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:Description: The size of the journal in megabytes.
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:Type: 32-bit Integer
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:Default: ``1024``
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:Recommended: Begin with 1GB. Should at least twice the product of the expected speed multiplied by ``filestore min sync interval``.
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``osd max write size``
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:Description: The maximum size of a write in megabytes.
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:Type: 32-bit Integer
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:Default: ``90``
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``osd client message size cap``
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:Description: The largest client data message allowed in memory.
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:Type: 64-bit Integer Unsigned
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:Default: 500MB default. ``500*1024L*1024L``
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``osd stat refresh interval``
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:Description: The status refresh interval in seconds.
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:Type: 64-bit Integer Unsigned
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:Default: ``.5``
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``osd pg bits``
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:Description: Placement group bits per OSD.
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:Type: 32-bit Integer
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:Default: ``6``
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``osd pgp bits``
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:Description: The number of bits per OSD for PGPs.
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:Type: 32-bit Integer
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:Default: ``4``
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``osd pg layout``
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:Description: Placement group layout.
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:Type: 32-bit Integer
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:Default: ``2``
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``osd pool default crush rule``
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:Description: The default CRUSH rule to use when creating a pool.
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:Type: 32-bit Integer
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:Default: ``0``
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``osd pool default size``
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:Description: The default size of an OSD pool in gigabytes. The default value is the same as ``--size 2`` with ``mkpool``.
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:Type: 32-bit Integer
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:Default: ``2``
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``osd pool default pg num``
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:Description: The default number of placement groups for a pool. The default value is the same as ``pg_num`` with ``mkpool``.
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:Type: 32-bit Integer
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:Default: ``8``
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``osd pool default pgp num``
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:Description: The default number of placement groups for placement for a pool. The default value is the same as ``pgp_num`` with ``mkpool``. PG and PGP should be equal (for now).
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:Type: 32-bit Integer
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:Default: ``8``
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``osd map dedup``
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:Description: Enable removing duplicates in the OSD map.
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:Type: Boolean
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:Default: ``true``
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``osd map cache size``
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:Description: The size of the OSD map cache in megabytes.
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:Type: 32-bit Integer
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:Default: ``500``
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``osd map cache bl size``
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:Description: The size of the in-memory OSD map cache in OSD daemons.
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:Type: 32-bit Integer
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:Default: ``50``
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``osd map cache bl inc size``
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:Description: The size of the in-memory OSD map cache incrementals in OSD daemons.
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:Type: 32-bit Integer
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:Default: ``100``
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``osd map message max``
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:Description: The maximum map entries allowed per MOSDMap message.
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:Type: 32-bit Integer
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:Default: ``100``
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``osd op threads``
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:Description: The number of OSD operation threads. Set to ``0`` to disable it. Increasing the number may increase the request processing rate.
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:Type: 32-bit Integer
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:Default: ``2``
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``osd op thread timeout``
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:Description: The OSD operation thread timeout in seconds.
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:Type: 32-bit Integer
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:Default: ``30``
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``osd disk threads``
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:Description: The number of disk threads, which are used to perform background disk intensive OSD operations such as scrubbing and snap trimming.
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:Type: 32-bit Integer
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:Default: ``1``
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``osd recovery threads``
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:Description: The number of threads for recovering data.
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:Type: 32-bit Integer
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:Default: ``1``
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``osd recover clone overlap``
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:Description: Preserves clone overlap during recovery and data migration.
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:Type: Boolean
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:Default: ``false``
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``osd backfill scan min``
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:Description: The scan interval in seconds for backfill operations.
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:Type: 32-bit Integer
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:Default: ``64``
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``osd backfill scan max``
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:Description: The maximum scan interval in seconds for backfill operations.
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:Type: 32-bit Integer
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:Default: ``512``
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``osd backlog thread timeout``
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:Description: The maximum time in seconds before timing out a backlog thread.
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:Type: 32-bit Integer
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:Default: ``60*60*1``
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``osd recovery thread timeout``
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:Description: The maximum time in seconds before timing out a recovery thread.
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:Type: 32-bit Integer
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:Default: ``30``
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``osd snap trim thread timeout``
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:Description: The maximum time in seconds before timing out a snap trim thread.
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:Type: 32-bit Integer
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:Default: ``60*60*1``
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``osd scrub thread timeout``
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:Description: The maximum time in seconds before timing out a scrub thread.
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:Type: 32-bit Integer
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:Default: ``60``
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``osd scrub finalize thread timeout``
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:Description: The maximum time in seconds before timing out a scrub finalize thread.
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:Type: 32-bit Integer
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:Default: 60*10
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``osd remove thread timeout``
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:Description: The maximum time in seconds before timing out a remove OSD thread.
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:Type: 32-bit Integer
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:Default: 60*60
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``osd command thread timeout``
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:Description: The maximum time in seconds before timing out a command thread.
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:Type: 32-bit Integer
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:Default: ``10*60``
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``osd heartbeat address``
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:Description: An OSD's network address for heartbeats.
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:Type: Address
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:Default: The host address.
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``osd heartbeat interval``
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:Description: How often an OSD pings its peers (in seconds).
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:Type: 32-bit Integer
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:Default: ``6``
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``osd heartbeat grace``
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:Description: The elapsed time when an OSD hasn't shown a heartbeat that the cluster considers it ``down``.
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:Type: 32-bit Integer
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:Default: ``20``
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``osd _mon_heartbeat interval``
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:Description: How often the OSD pings a monitor if it has no OSD peers.
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:Type: 32-bit Integer
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:Default: ``30``
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``osd mon report interval max``
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:Description: The maximum time in seconds for an OSD to report to a monitor before the monitor considers the OSD ``down``.
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:Type: 32-bit Integer
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:Default: ``120``
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``osd mon report interval min``
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:Description: The number of minutes between reports that include ``pg stats``, ``up thru``, ``boot`` and ``failures``.
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:Type: 32-bit Integer
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:Default: ``5``
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``osd mon ack timeout``
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:Description: The number of seconds to wait for a monitor to acknowledge a request for statistics.
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:Type: 32-bit Integer
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:Default: ``30``
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``osd min down reporters``
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:Description: The minimum number of OSDs required to report a ``down`` OSD.
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:Type: 32-bit Integer
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:Default: ``1``
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``osd min down reports``
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:Description: The minimum number of times an OSD must report that another is ``down``.
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:Type: 32-bit Integer
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:Default: ``3``
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``osd recovery delay start``
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:Description: After peering completes, Ceph will delay for the specified number of seconds before starting to recover objects.
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:Type: Float
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:Default: ``15``
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``osd recovery max active``
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:Description: The number of active recovery requests per OSD at one time. More accelerates recovery, but places an increased load on the cluster.
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:Type: 32-bit Integer
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:Default: ``5``
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``osd recovery max chunk``
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:Description: The maximum size of a recovered chunk of data to push.
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:Type: 64-bit Integer Unsigned
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:Default: ``1 << 20``
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``osd max scrubs``
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:Description: The maximum number of scrub operations for an OSD.
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:Type: 32-bit Int
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:Default: ``1``
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``osd scrub load threshold``
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:Description: The maximum CPU load. Ceph will not scrub when the CPU load is higher than this number. Default is 50%.
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:Type: Float
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:Default: ``0.5``
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``osd scrub min interval``
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:Description: The maximum interval in seconds for scrubbing the OSD.
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:Type: Float
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:Default: 5 minutes. ``300``
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``osd scrub max interval``
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:Description: The maximum interval in seconds for scrubbing the OSD.
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:Type: Float
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:Default: Once per day. ``60*60*24``
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``osd deep scrub interval``
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:Description: The interval for "deep" scrubbing (fully reading all data)
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:Type: Float
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:Default: Once per week. ``60*60*24*7``
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``osd deep scrub stride``
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:Description: Read siez when doing a deep scrub
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:Type: 32-bit Int
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:Default: 512 KB. ``524288``
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``osd class dir``
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:Description: The class path for RADOS class plug-ins.
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:Type: String
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:Default: ``$libdir/rados-classes``
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``osd check for log corruption``
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:Description: Check log files for corruption. Can be computationally expensive.
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:Type: Boolean
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:Default: ``false``
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``osd default notify timeout``
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:Description: The OSD default notification timeout (in seconds).
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:Type: 32-bit Integer Unsigned
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:Default: ``30``
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``osd min pg log entries``
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:Description: The minimum number of placement group logs to maintain when trimming log files.
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:Type: 32-bit Int Unsigned
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:Default: 1000
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``osd op complaint time``
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:Description: An operation becomes complaint worthy after the specified number of seconds have elapsed.
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:Type: Float
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:Default: ``30``
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``osd command max records``
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:Description: Limits the number of lost objects to return.
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:Type: 32-bit Integer
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:Default: ``256``
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``osd auto upgrade tmap``
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:Description: Uses ``tmap`` for ``omap`` on old objects.
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:Type: Boolean
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:Default: ``true``
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``osd tmapput sets users tmap``
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:Description: Uses ``tmap`` for debugging only.
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:Type: Boolean
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:Default: ``false``
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``osd kill backfill at``
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:Description: For debugging only.
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:Type: 32-bit Integer
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:Default: ``0``
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