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.
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.
service ceph osd stop $OSD
mkfs -t xfs /dev/XXX
ceph-osd -i $OSD --mkfs --mkkey --mkjournal
service ceph osd start $OSD
this is what I did now:
ceph osd set noout service ceph stop osd.X umount /dev/sdX1 mkfs.xfs -f -i size=2048 /dev/sdX1 -L osd.X vim /etc/fstab # edit line for /dev/sdX1 mount /dev/sdX1 ceph-osd -i X --mkfs --mkkey --mkjournal ceph auth add osd.X osd 'allow *' mon 'allow rwx' -i /var/lib/ceph/osd/ceph-X/keyring service ceph start osd.X
seems to work so far, the OSD is busy retrieving data - and I didn't have to wait for the OSD to become empty.
cheers jc |
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