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