Object Storage Device
OSD
- A physical or logical storage unit (*e.g.*, LUN). Ceph users often
- conflate the term OSD with "Ceph OSD Daemon."
+ A physical or logical storage unit (*e.g.*, LUN).
+ Sometimes, Ceph users use the
+ term "OSD" to refer to :term:`Ceph OSD Daemon`, though the
+ proper term is "Ceph OSD".
Ceph OSD Daemon
- OSD
Ceph OSD
- The Ceph OSD software, which interacts with a logical disk (OSD). Ceph
- users often frequently conflate the term OSD with "Ceph OSD Daemon."
+ The Ceph OSD software, which interacts with a logical
+ disk (:term:`OSD`). Sometimes, Ceph users use the
+ term "OSD" to refer to "Ceph OSD Daemon", though the
+ proper term is "Ceph OSD".
Ceph Monitor
MON
| OSDs | | Monitor | | MDS |
+---------------+ +---------------+ +---------------+
-- **OSDs**: A :term:`Ceph OSD Daemon` (OSD) stores data, handles data
+- **Ceph OSDs**: A :term:`Ceph OSD Daemon` (Ceph OSD) stores data, handles data
replication, recovery, backfilling, rebalancing, and provides some monitoring
information to Ceph Monitors by checking other Ceph OSD Daemons for a
heartbeat. A Ceph Storage Cluster requires at least two Ceph OSD Daemons to