diff options
Diffstat (limited to 'doc/dev/osd_internals/osd_throttles.txt')
| -rw-r--r-- | doc/dev/osd_internals/osd_throttles.txt | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/doc/dev/osd_internals/osd_throttles.txt b/doc/dev/osd_internals/osd_throttles.txt new file mode 100644 index 00000000..0332377e --- /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, 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) |