use crushtool to simulate pg distribution for a specific pool

[david-z]

http://tracker.ceph.com/issues/13188

Fixes: #13188

Signed-off-by: Zhi Zhang zhangz.david@outlook.com

[loic-bot]

FAILURE: http://jenkins.ceph.dachary.org/job/ceph/7891/

• FAILURE http://jenkins.ceph.dachary.org/job/ceph/LABELS=centos-7&&x86_64/7891/

[david-z]

@dachary this failure is due to the crushtool in master branch is changed from the hammer branch which I used to compile on. Now I have fixed it, compiled it successfully in my local env and tested already. Will you help to take a look?

Thanks.

[ghost]

@david-z the bot will run again, fingers crossed :-)

[loic-bot]

SUCCESS: http://jenkins.ceph.dachary.org/job/ceph/7915/

• SUCCESS http://jenkins.ceph.dachary.org/job/ceph/LABELS=centos-7&&x86_64/7915/

[liewegas]

This change is better made in the osdmaptool, which has similar --test-map-all-pgs and --test-map-pg functions. Simply add a --test-map-all-pool-pgs (or similar) function there.

I don't think we should put a mimicry of the ceph pg -> crush input calculation in the crush code (which is destined to fail.. among other things that mapping depends on pool properties like hashpspool)