Re: [ceph-users] Testing a hypothetical crush map

2018-08-06 Thread David Majchrzak
Hi Andras, From what I can tell you can run crushtool with --test http://docs.ceph.com/docs/master/man/8/crushtool/ (https://link.getmailspring.com/link/1533557996.local-a293f1fe-4d41-v1.3.0-fd741...@getmailspring.com/0?redirect=http%3A%2F%2Fdocs.ceph.com%2Fdocs%2Fmaster%2Fman%2F8%2Fcrushtool%2F&

[ceph-users] Testing a hypothetical crush map

2018-08-06 Thread Andras Pataki
Hi cephers, Is there a way to see what a crush map change does to the PG mappings (i.e. what placement groups end up on what OSDs) without actually setting the crush map (and have the map take effect)?  I'm looking for some way I could test hypothetical crush map changes without any effect on