Description of problem:
The tcmu-runner xcopy support does at most 1 512K IO at a time. It reads 512K, then writes it, then repeats.
Ideally, for rbd we should add offload support similar to what was done for write same and compare and write.
In the near term and to if needed to handle xcopys that do not cover entire ceph objects, we should fix the emulated xcopy support to work like the emulated unmap where we can break up a unmap into multiple parts that at executed in parallel.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
@Mike, will this be fixed in 3.2? if yes then please change the target release field.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.