Ceph

Describe RADOS software components

Difficulty: unrated

Source: bregman-arie/devops-exercises by Arie Bregman

Answer

  • Monitor
    • Central authority for authentication, data placement, policy
    • Coordination point for all other cluster components
    • Protect critical cluster state with Paxos
  • Manager
    • Aggregates real-time metrics (throughput, disk usage, etc.)
    • Host for pluggable management functions
    • 1 active, 1+ standby per cluster
  • OSD (Object Storage Daemon)
    • Stores data on an HDD or SSD
    • Services client IO requests