mirror of
https://github.com/ceph/ceph
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155 lines
3.8 KiB
ReStructuredText
155 lines
3.8 KiB
ReStructuredText
===========
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Messaging
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===========
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General Settings
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================
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``ms tcp nodelay``
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:Description: Disables nagle's algorithm on messenger tcp sessions.
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:Type: Boolean
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:Required: No
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:Default: ``true``
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``ms initial backoff``
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:Description: The initial time to wait before reconnecting on a fault.
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:Type: Double
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:Required: No
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:Default: ``.2``
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``ms max backoff``
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:Description: The maximum time to wait before reconnecting on a fault.
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:Type: Double
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:Required: No
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:Default: ``15.0``
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``ms nocrc``
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:Description: Disables crc on network messages. May increase performance if cpu limited.
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:Type: Boolean
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:Required: No
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:Default: ``false``
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``ms die on bad msg``
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:Description: Debug option; do not configure.
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:Type: Boolean
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:Required: No
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:Default: ``false``
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``ms dispatch throttle bytes``
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:Description: Throttles total size of messages waiting to be dispatched.
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:Type: 64-bit Unsigned Integer
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:Required: No
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:Default: ``100 << 20``
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``ms bind ipv6``
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:Description: Enable if you want your daemons to bind to IPv6 address instead of IPv4 ones. (Not required if you specify a daemon or cluster IP.)
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:Type: Boolean
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:Required: No
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:Default: ``false``
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``ms rwthread stack bytes``
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:Description: Debug option for stack size; do not configure.
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:Type: 64-bit Unsigned Integer
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:Required: No
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:Default: ``1024 << 10``
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``ms tcp read timeout``
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:Description: Controls how long (in seconds) the messenger will wait before closing an idle connection.
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:Type: 64-bit Unsigned Integer
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:Required: No
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:Default: ``900``
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``ms inject socket failures``
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:Description: Debug option; do not configure.
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:Type: 64-bit Unsigned Integer
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:Required: No
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:Default: ``0``
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Async messenger options
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=======================
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``ms async transport type``
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:Description: Transport type used by Async Messenger. Can be ``posix``, ``dpdk``
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or ``rdma``. Posix uses standard TCP/IP networking and is default.
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Other transports may be experimental and support may be limited.
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:Type: String
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:Required: No
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:Default: ``posix``
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``ms async op threads``
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:Description: Initial number of worker threads used by each Async Messenger instance.
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Should be at least equal to highest number of replicas, but you can
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decrease it if you are low on CPU core count and/or you host a lot of
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OSDs on single server.
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:Type: 64-bit Unsigned Integer
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:Required: No
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:Default: ``3``
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``ms async max op threads``
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:Description: Maximum number of worker threads used by each Async Messenger instance.
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Set to lower values when your machine has limited CPU count, and increase
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when your CPUs are underutilized (i. e. one or more of CPUs are
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constantly on 100% load during I/O operations).
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:Type: 64-bit Unsigned Integer
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:Required: No
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:Default: ``5``
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``ms async set affinity``
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:Description: Set to true to bind Async Messenger workers to particular CPU cores.
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:Type: Boolean
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:Required: No
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:Default: ``true``
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``ms async affinity cores``
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:Description: When ``ms async set affinity`` is true, this string specifies how Async
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Messenger workers are bound to CPU cores. For example, "0,2" will bind
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workers #1 and #2 to CPU cores #0 and #2, respectively.
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NOTE: when manually setting affinity, make sure to not assign workers to
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processors that are virtual CPUs created as an effect of Hyperthreading
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or similar technology, because they are slower than regular CPU cores.
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:Type: String
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:Required: No
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:Default: ``(empty)``
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``ms async send inline``
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:Description: Send messages directly from the thread that generated them instead of
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queuing and sending from Async Messenger thread. This option is known
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to decrease performance on systems with a lot of CPU cores, so it's
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disabled by default.
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:Type: Boolean
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:Required: No
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:Default: ``false``
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