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High-level Operations
High-level cluster operations consist primarily of starting, stopping, andrestarting a cluster with the ceph service; checking the cluster’s health;and, monitoring an operating cluster.
- Operating a Cluster
- Health checks
- Monitoring a Cluster
- Monitoring OSDs and PGs
- User Management
- Repairing PG inconsistencies
Data Placement
Once you have your cluster up and running, you may begin working with dataplacement. Ceph supports petabyte-scale data storage clusters, with storagepools and placement groups that distribute data across the cluster using Ceph’sCRUSH algorithm.
- Data Placement Overview
- Pools
- Erasure code
- Cache Tiering
- Placement Groups
- Balancer
- Using the pg-upmap
- CRUSH Maps
- Manually editing a CRUSH Map
Low-level Operations
Low-level cluster operations consist of starting, stopping, and restarting aparticular daemon within a cluster; changing the settings of a particulardaemon or subsystem; and, adding a daemon to the cluster or removing a daemonfrom the cluster. The most common use cases for low-level operations includegrowing or shrinking the Ceph cluster and replacing legacy or failed hardwarewith new hardware.
Troubleshooting
Ceph is still on the leading edge, so you may encounter situations that requireyou to evaluate your Ceph configuration and modify your logging and debuggingsettings to identify and remedy issues you are encountering with your cluster.
