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Move DB to new drive
ceph osd set noout systemctl stop ceph-osd@3 systemctl disable ceph-osd@3 ddrescue -f -n -vv <OLD> <NEW> * dump NVM DB partition: ''dd if=/dev/nvme0n1p3 of=DB.img bs=4M'' * shutdown machine and replace NVM drive <code bash> zfs create -V 5GB rpool/data/DB ceph-bluestore-tool --path /var/lib/ceph/osd/ceph-3 --devs-source /var/lib/ceph/osd/ceph-3/block.db --command bluefs-bdev-migrate --dev-target /dev/zvol/rpool/data/DB inferring bluefs devices from bluestore path device removed:1 /var/lib/ceph/osd/ceph-3/block.db device added: 1 /dev/zd144
Rollback:
ceph-bluestore-tool --path /var/lib/ceph/osd/ceph-3 --devs-source /var/lib/ceph/osd/ceph-3/block.db --command bluefs-bdev-migrate --dev-target /dev/nvme0n1p3
/usr/bin/ln -snf /dev/zd144 /var/lib/ceph/osd/ceph-3/block.db
DRAFT:
ceph-bluestore-tool –path /var/lib/ceph/osd/ceph-12 –devs-source /var/lib/ceph/osd/ceph-12/block –devs-source /var/lib/ceph/osd/ceph-12/block.db –command bluefs-bdev-migrate –dev-target –dev-target /dev/vdg1