![]() Multipath devices are supported if lvm is configured properly. The CLI call looks like this of a basic standalone filestore OSD:Ĭeph - volume lvm prepare - bluestore - data vg / lv - crush - device - class foo multipath support No special preparation is needed for these volumes other thanįollowing the minimum size requirements for data and journal. A volume group will either be created or reused it its name begins A physical device will have a logical volumeĬreated on it. It can use a logical volume for the OSD data and a physical device, a partition This is the OSD backend that allows preparation of logical volumes for In the above case, a device was used for block so ceph-volume createĪ volume group and a logical volume using the following convention: 1 ceph ceph 10 Oct 20 13 : 05 type - rw. 1 ceph ceph 6 Oct 20 13 : 05 ready - rw. 1 ceph ceph 55 Oct 20 13 : 05 keyring - rw. 1 ceph ceph 37 Oct 20 13 : 05 fsid - rw. 1 ceph ceph 37 Oct 20 13 : 05 ceph_fsid - rw. wal -> / dev / ceph / osd - wal - 0 - rw. # ls -l /var/lib/ceph/osd/ceph-0 lrwxrwxrwx. The block is specified with the -data flag, and in its simplest use There are no options or configurations to change how the LV is created. This allows a simpler approach at using LVM but at the cost of flexibility: A volume group willĮither be created or reused it its name begins with ceph. If a physical device is provided, a logical volume will be created. Physical block devices or logical volumes as arguments for the various device parameters ![]() The bluestore subcommand accepts physical block devices, partitions on More flexibility for devices compared to filestore.īluestore supports the following configurations:Ī block device, a block.wal, and a block.db device The bluestore objectstore is the default for new OSDs. Part of a Ceph system, and what role they have (journal, filestore, bluestore,Īlthough bluestore is the default, the back end can be specified with: LVM tags makes volumes easy to discover later, and help identify them as Work with Ceph, the tool will assign a few pieces of metadata information using To help identify volumes, the process of preparing a volume (or volumes) to This is part of a two step process to deploy an OSD.
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