> We made a mistake when we moved the servers physically so while the > replica 3 is intact the crush tree is not accurate. > > If we just remedy the situation with "ceph osd crush move ceph-flashX > datacenter=Y" we will just end up with a lot of misplaced data and some > churn, right? Or will the affected pool go degraded/unavailable? I know I am late here, but for the record, if you ask crush to change in such a way that PGs are asked to move to "impossible" places, they will just end up being remapped/misplaced and continue to serve data. They will obviously not backfill anywhere, but they will also not cause troubles apart from ceph -s telling you the whole pool(s) is misplaced currently. Then you can revert the crush change and everything goes back to normal again. I have made such "mistakes" several times, and ceph kept going even though I panicked and flailed with my arms a lot until I managed to revert the bad crush map changes. -- May the most significant bit of your life be positive. _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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