mirror of https://github.com/ceph/ceph
34 lines
1.6 KiB
ReStructuredText
34 lines
1.6 KiB
ReStructuredText
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============================
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Messenger notes
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============================
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Messenger is the Ceph network layer implementation. Currently Ceph supports
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three messenger type "simple", "async" and "xio". The latter two are both
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experiment features and shouldn't use them in production environment.
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ceph_perf_msgr
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==============
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ceph_perf_msgr is used to do benchmark for messenger module only and can help
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to find the bottleneck or time consuming within messenger moduleIt just like
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"iperf", we need to start server-side program firstly:
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# ./ceph_perf_msgr_server 172.16.30.181:10001 0
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The first argument is ip:port pair which is telling the destination address the
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client need to specified. The second argument tells the "think time" when
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dispatching messages. After Giant, CEPH_OSD_OP message which is the actual client
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read/write io request is fast dispatched without queueing to Dispatcher, in order
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to achieve better performance. So CEPH_OSD_OP message will be processed inline,
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"think time" is used by mock this "inline process" process.
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# ./ceph_perf_msgr_client 172.16.30.181:10001 1 32 10000 10 4096
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The first argument is specified the server ip:port, and the second argument is
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used to specify client threads. The third argument specify the concurrency(the
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max inflight messages for each client thread), the fourth argument specify the
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io numbers will be issued to server per client thread. The fifth argument is
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used to indicate the "think time" for client thread when receiving messages,
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this is also used to mock the client fast dispatch process. The last argument
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specify the message data length to issue.
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