> > Why wait for the data to migrate away? Normally you have replicas of the > whole osd data, so you can simply stop the osd, reformat the disk and restart > it again. It'll join the cluster and automatically get all data it's missing. > Of course the risk of dataloss is a bit higher during that time, but normally > that should be ok, because it's not different from an ordinary disk failure > which can happen any time.
Because I lost 2 objects last time I did that trick (probably caused by additional user (i.e. me) stupidity in the first place, but I don't really fancy taking chances this time :) ) > > I just found a similar question from one year ago: > http://www.spinics.net/lists/ceph-devel/msg05915.html I didn't read the whole > thread, but probably you can find some other ideas there. I read it, but it is the usual to a fro - no definitive solution... > > service ceph osd stop $OSD > mkfs -t xfs /dev/XXX > ceph-osd -i $OSD --mkfs --mkkey --mkjournal > service ceph osd start $OSD I'll give that a whirl - I have enough OSDs to try - as soon as the cluster has recovered from the 9 disks I formatted on saturday cheers jc
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