[ceph.git] / ceph / doc / dev / osd_internals / osd_throttles.txt

                                                                                                   Messenger throttle (number and size)
         |-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
                                                                     FileStore op_queue throttle (number and size, includes a soft throttle based on filestore_expected_throughput_(ops|bytes))
                                                                |--------------------------------------------------------|
                                                                                                                                                                   WBThrottle
                                                                                                                       |---------------------------------------------------------------------------------------------------------|
                                                                                                                                                                 Journal (size, includes a soft throttle based on filestore_expected_throughput_bytes)
                                                                 |-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
                                                                                                                       |----------------------------------------------------------------------------------------------------> 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)
Commit	Line	Data
7c673cae FG	1	Messenger throttle (number and size)
	2	\|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------\|
	3	FileStore op_queue throttle (number and size, includes a soft throttle based on filestore_expected_throughput_(ops\|bytes))
	4	\|--------------------------------------------------------\|
	5	WBThrottle
	6	\|---------------------------------------------------------------------------------------------------------\|
	7	Journal (size, includes a soft throttle based on filestore_expected_throughput_bytes)
	8	\|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------\|
	9	\|----------------------------------------------------------------------------------------------------> flushed ----------------> synced
	10	\|
	11	Op: Read Header --DispatchQ--> OSD::_dispatch --OpWQ--> PG::do_request --journalq--> Journal --FileStore::OpWQ--> Apply Thread --Finisher--> op_applied -------------------------------------------------------------> Complete
	12	\| \|
	13	SubOp: --Messenger--> ReadHeader --DispatchQ--> OSD::_dispatch --OpWQ--> PG::do_request --journalq--> Journal --FileStore::OpWQ--> Apply Thread --Finisher--> sub_op_applied -
	14	\|
	15	\|-----------------------------> flushed ----------------> synced
	16	\|------------------------------------------------------------------------------------------\|
	17	Journal (size)
	18	\|---------------------------------\|
	19	WBThrottle
	20	\|-----------------------------------------------------\|
	21	FileStore op_queue throttle (number and size)