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vm:proxmox:ceph:db:move_db_disks [2024/01/18 15:53] – niziakvm:proxmox:ceph:db:move_db_disks [2025/03/30 21:39] (current) – niziak
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-====== DB ====== 
- 
 ====== Move DB to bigger storage ====== ====== Move DB to bigger storage ======
  
-I.e: to move from 4GB partition to 30GB partition in case of ''BlueFS spillover detected''+I.e: to move from 4GB partition to 30GB partition in case of spillover:
  
-<code bash>+<code> 
 +1 OSD(s) experiencing BlueFS spillover 
 + 
 + osd.3 spilled over 985 MiB metadata from 'db' device (3.8 GiB used of 4.0 GiB) to slow device 
 +</code> 
 + 
 + 
 +<code>
 lvdisplay lvdisplay
   --- Logical volume ---   --- Logical volume ---
Line 41: Line 46:
 </code> </code>
  
-Create new 41GB partition (/dev/nvme0n1p6)+===== resize exsiting DB partition ===== 
 + 
 +Remove separate DB and migrate data back to main storage: 
 +<code bash> 
 +ceph osd set noout 
 +systemctl stop ceph-osd@3.service 
 + 
 +cat /var/lib/ceph/osd/ceph-3/fsid  
 +lvdisplay 
 + 
 +ceph-volume lvm migrate --osd-id 3 --osd-fsid 024c05b3-6e22-4df1-b0af-5cb46725c5c8 --from db --target ceph-5582d170-f77e-495c-93c6-791d9310872c/osd-block-024c05b3-6e22-4df1-b0af-5cb46725c5c8 
 +--> Migrate to existing, Source: ['--devs-source', '/var/lib/ceph/osd/ceph-0/block.db'] Target: /var/lib/ceph/osd/ceph-0/block 
 +--> Migration successful. 
 +</code> 
 + 
 +Create (or resize) new PV,VG,LV for DB and attach it: 
 + 
 +<code bash> 
 +pvcreate /dev/nvme0n1p6 
 + 
 +vgcreate ceph-db-8gb /dev/nvme0n1p6 
 +OR 
 +vgextend ... 
 + 
 +lvcreate -n db-8gb -l 100%FREE ceph-db-8gb 
 +OR 
 +lvextend -l +100%FREE ceph-db/db 
 + 
 +ceph-volume lvm new-db --osd-id 0 --osd-fsid 024c05b3-6e22-4df1-b0af-5cb46725c5c8 --target ceph-db-8gb/db-8gb 
 +--> Making new volume at /dev/ceph-db-8gb/db-8gb for OSD: 0 (/var/lib/ceph/osd/ceph-0) 
 +Running command: /usr/bin/chown -h ceph:ceph /var/lib/ceph/osd/ceph-0/block.db 
 +Running command: /usr/bin/chown -R ceph:ceph /dev/dm-0 
 +--> New volume attached. 
 +</code> 
 + 
 +<code bash> 
 +ceph-volume lvm migrate --osd-id 0 --osd-fsid 024c05b3-6e22-4df1-b0af-5cb46725c5c8 --from data db --target ceph-db-8gb/db-8gb 
 +--> Migrate to existing, Source: ['--devs-source', '/var/lib/ceph/osd/ceph-0/block'] Target: /var/lib/ceph/osd/ceph-0/block.db 
 +--> Migration successful. 
 +</code> 
 + 
 +<code bash> 
 +systemctl start ceph-osd@3.service 
 +ceph osd unset noout 
 +</code> 
 + 
 +===== OR: create new one ===== 
 + 
 + 
 +Create new 41GB (41984MB) partition (/dev/nvme0n1p6)
 <code> <code>
 pvcreate /dev/nvme0n1p6 pvcreate /dev/nvme0n1p6
 vgcreate ceph-db-40gb /dev/nvme0n1p6 vgcreate ceph-db-40gb /dev/nvme0n1p6
-lvcreate -n db-40db -l 100%FREE ceph-db-40gb+lvcreate -n db-40gb -l 100%FREE ceph-db-40gb
 </code> </code>