mirror of
https://github.com/ceph/ceph
synced 2024-12-30 07:23:11 +00:00
34 lines
1.6 KiB
ReStructuredText
34 lines
1.6 KiB
ReStructuredText
============================
|
|
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.
|