Merge pull request #5271 from wonzhq/cache-rate

mon: add cache tier IO rate in the 'osd pool stats' command

Reviewed-by: Sage Weil <sage@redhat.com>

diff --cc src/mon/OSDMonitor.cc
Simple merge

diff --cc src/osd/ReplicatedPG.cc
Simple merge

diff --cc src/osd/osd_types.cc
Simple merge

diff --cc src/osd/osd_types.h
Simple merge