Administration

An IBM Storage Ceph cluster is the foundation for all Ceph deployments. After deploying the cluster, there are administrative operations for keeping the cluster healthy and perform optimally.

This section helps storage administrators to perform such tasks as:

• How do I check the health of my cluster?
• How do I start and stop the services?
• How do I add or remove an OSD from a running cluster?
• How do I manage user authentication and access controls to the objects stored in the cluster?
• I want to understand how to use overrides with the cluster.
• I want to monitor the performance of the cluster.

A basic Ceph storage cluster consist of two types of daemons:

• A Ceph Object Storage Device (OSD) stores data as objects within placement groups assigned to the OSD
• A Ceph Monitor maintains a master copy of the cluster map

A production system will have three or more Ceph Monitors for high availability and typically a minimum of 50 OSDs for acceptable load balancing, data re-balancing and data recovery.