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Practical Guide: Ceph Command Tools Summary 📋 Common Tools (Summary Overview) Function Category Main Commands Verification Status Usage Frequency Application Scenarios Risk Level Cluster Monitoring ceph -s, ceph health(detail), ceph df, ceph -w ✅ Verified ⭐⭐⭐⭐⭐ Daily monitoring, troubleshooting 🟢 No risk I/O Monitoring ceph iostat(version dependent,N+), ceph -w, ceph status ✅ Verified ⭐⭐⭐⭐ Performance monitoring 🟢 No risk OSD Management ceph osd tree, ceph osd status, ceph osd out/in ✅ Verified ⭐⭐⭐⭐ OSD maintenance, capacity management 🟡 Medium risk (queries safe) Monitor Management ceph mon stat, ceph quorum_status, ceph mon add/remove ✅ Verified ⭐⭐⭐ Cluster management, high availability 🔴 High risk (queries safe) Manager Management ceph mgr module enable/disable, ceph mgr stat ✅ Verified ⭐⭐⭐ Feature management, dashboard 🟡 Medium risk (queries safe) Pool Management ceph osd pool create/delete, ceph osd pool set ✅ Verified ⭐⭐⭐⭐ Storage planning, quota management 🔴 High risk (queries safe) PG Management ceph pg stat, ceph pg repair, ceph pg scrub ✅ Verified ⭐⭐⭐⭐ Data integrity, fault repair 🟡 Medium risk (queries safe) Authentication Management ceph auth list/create/del ✅ Verified ⭐⭐⭐ Security management, access control 🔴 High risk (queries safe) CRUSH Management ceph osd crush tree, crushtool, ceph osd crush rule ✅ Verified ⭐⭐ Data distribution, failure domains 🔴 High risk (queries safe) RBD Management rbd create/rm, rbd snap create, rbd map/unmap ✅ Verified ⭐⭐⭐⭐ Block storage, snapshot management 🟡 Medium risk CephFS Management ceph fs status, ceph mds stat, ceph fs dump, ceph mds fail ✅ Verified ⭐⭐⭐ File system, metadata 🟡 Medium risk (queries safe) RGW Management radosgw-admin user create, radosgw-admin bucket ✅ Verified ⭐⭐⭐ Object storage, user management 🟡 Medium risk (queries safe) Configuration Management ceph config set/get, ceph tell Not verified ⭐⭐⭐⭐ Parameter tuning, fault handling 🟡 Medium risk (queries safe) Performance Analysis ceph osd perf,rbd perf image iostat, cephfs-top ✅ Verified ⭐⭐⭐ Performance testing, bottleneck analysis 🟢 No risk Specialized Tools ceph-objectstore-tool, ceph-bluestore-tool ✅ Verified ⭐⭐ Data recovery, deep diagnostics 🔴 High risk (queries safe) Troubleshooting journalctl, ceph daemon dump, log analysis ✅ Verified ⭐⭐⭐⭐ Problem diagnosis, root cause analysis 🟢 No risk Backup Recovery ceph mon getmap, ceph auth export, data export ✅ Verified ⭐⭐ Disaster recovery, migration 🟡 Medium risk (queries safe) 🔧 1.