rados bench duration can be ignored
Sometimes a thrashing run with rados bench will continue indefinitely, with rados bench continuing to write after its timeout has expired.
#1 Updated by Greg Farnum over 9 years ago
Is it generating new writes, or waiting for old writes to complete?
The time you give rados bench was never intended to be an absolute upper-limit; that's the point at which it stops sending new writes to the OSDs — but then it waits until all its old writes have completed before exiting.