From: John Wilkins <john.wilkins@inktank.com>
Date: Fri, 31 May 2013 18:14:29 +0000 (-0700)
Subject: doc: Text of diagram for osd_throttles.
X-Git-Tag: v0.65~173
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=145c480807fccd4f357380c2cbab5e38197229bf;p=ceph.git

doc: Text of diagram for osd_throttles.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
---

diff --git a/doc/dev/osd_internals/osd_throttles.txt b/doc/dev/osd_internals/osd_throttles.txt
new file mode 100644
index 000000000000..4fa3044f9864
--- /dev/null
+++ b/doc/dev/osd_internals/osd_throttles.txt
@@ -0,0 +1,21 @@
+                                                                                                   Messenger throttle (number and size)
+         |-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+                                                                     FileStore op_queue throttle (number and size)
+                                                                |--------------------------------------------------------|
+                                                                                                                                                                   WBThrottle
+                                                                                                                       |---------------------------------------------------------------------------------------------------------|
+                                                                                                                                                                 Journal (size)
+                                                                                        |-----------------------------------------------------------------------------------------------------------------------------------------------------------------|
+                                                                                                                       |----------------------------------------------------------------------------------------------------> flushed ----------------> synced
+                                                                                                                       |
+Op: Read Header --DispatchQ--> OSD::_dispatch --OpWQ--> PG::do_request --journalq--> Journal --FileStore::OpWQ--> Apply Thread --Finisher--> op_applied ------------------------------------------------------------->  Complete
+                                              |                                                                                                                                                                      |
+SubOp:                                        --Messenger--> ReadHeader --DispatchQ--> OSD::_dispatch --OpWQ--> PG::do_request --journalq--> Journal --FileStore::OpWQ--> Apply Thread --Finisher--> sub_op_applied -
+                                                                                                                                                                              |
+                                                                                                                                                                              |-----------------------------> flushed ----------------> synced
+                                                                                                                                                |------------------------------------------------------------------------------------------|
+                                                                                                                                                                                        Journal (size)
+                                                                                                                                                                              |---------------------------------|
+                                                                                                                                                                                        WBThrottle
+                                                                                                                         |-----------------------------------------------------|
+                                                                                                                            FileStore op_queue throttle (number and size)