ceph:tldr:d650b

The command "ceph status" is used to retrieve information about the current status of a Ceph storage cluster.

Ceph is a distributed storage system that provides both object storage and block storage capabilities. It is designed to be highly scalable, fault-tolerant, and reliable.

When you run the "ceph status" command, it communicates with the Ceph cluster and returns various details about the overall health and status of the cluster. Some of the information that may be included in the output of this command is:

1. Cluster ID: The unique identifier of the Ceph storage cluster.
2. Health: Indicates whether the cluster is in a healthy state or if there are any issues or problems present.
3. Services: Displays the number of running Ceph services, such as Ceph OSDs (Object Storage Daemons), Ceph Monitors, Ceph Metadata servers, and Ceph Managers.
4. Health Checks: Provides a summary of any health checks that have been performed on the cluster, along with their status (e.g., OK, WARN, ERR).
5. Placement Group (PG) Status: Shows the number of PGs that are active, degraded, or misplaced.
6. OSD (Object Storage Daemon) Status: Displays information about the state and status of individual OSDs in the cluster.

By analyzing the output of the "ceph status" command, administrators can get an overview of the cluster's health and identify any potential issues that need to be addressed.