Messaging¶

General Settings¶

ms tcp nodelay

ms initial backoff

ms max backoff

ms nocrc

Description: Disables crc on network messages. May increase performance if cpu limited.
Type: Boolean
Required: No
Default: false

ms die on bad msg

ms dispatch throttle bytes

ms bind ipv6

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.)
Type: Boolean
Required: No
Default: false

ms rwthread stack bytes

ms tcp read timeout

Description: Controls how long (in seconds) the messenger will wait before closing an idle connection.
Type: 64-bit Unsigned Integer
Required: No
Default: 900

ms inject socket failures

ms async transport type

Description: Transport type used by Async Messenger. Can be posix, dpdk or rdma. Posix uses standard TCP/IP networking and is default. Other transports may be experimental and support may be limited.
Type: String
Required: No
Default: posix

ms async op threads

Description: Initial number of worker threads used by each Async Messenger instance. Should be at least equal to highest number of replicas, but you can decrease it if you are low on CPU core count and/or you host a lot of OSDs on single server.
Type: 64-bit Unsigned Integer
Required: No
Default: 3

ms async max op threads

Description: Maximum number of worker threads used by each Async Messenger instance. Set to lower values when your machine has limited CPU count, and increase when your CPUs are underutilized (i. e. one or more of CPUs are constantly on 100% load during I/O operations).
Type: 64-bit Unsigned Integer
Required: No
Default: 5

ms async send inline

Description: Send messages directly from the thread that generated them instead of queuing and sending from Async Messenger thread. This option is known to decrease performance on systems with a lot of CPU cores, so it’s disabled by default.
Type: Boolean
Required: No
Default: false