故障域是指阻止访问一个或多个OSDs的任何故障。这可能是主机上已停止的守护进程;硬盘故障、操作系统崩溃、网卡故障、电源故障、网络中断、电源中断，等等。
在规划硬件需求时，您必须平衡降低成本的诱惑，即把太多的责任放在太少的故障域中，以及隔离每个潜在故障域所增加的成本
硬件配置建议
- 最小配置建议
| Process | Criteria | Minimum Recommended |
|---|---|---|
| ceph-OSD | Processor | 1x 64-bit AMD-64 1x 32-bit ARM dual-core or better |
| RAM | ~1GB for 1TB of storage per daemon | |
| Volume Storage | 1x storage drive per daemon | |
| Journal | 1x SSD partition per daemon (optional) | |
| Network | 2x 1GB Ethernet NICs | |
| ceph-mon | Processor | 1x 64-bit AMD-64 1x 32-bit ARM dual-core or better |
| RAM | 1 GB per daemon | |
| Disk Space | 10 GB per daemon | |
| Network | 2x 1GB Ethernet NICs | |
| ceph-mds | Processor | 1x 64-bit AMD-64 quad-core 1x 32-bit ARM quad-core |
| RAM | 1 GB minimum per daemon | |
| Disk Space | 1 MB per daemon | |
| Network | 2x 1GB Ethernet NICs |
- 生产环境建议
| Configuration | Criteria | Minimum Recommended |
|---|---|---|
| Dell PE R510 | Processor | 2x 64-bit quad-core Xeon CPUs |
| RAM | 16 GB | |
| Volume Storage | 8x 2TB drives. 1 OS, 7 Storage | |
| Client Network | 2x 1GB Ethernet NICs | |
| OSD Network | 2x 1GB Ethernet NICs | |
| Mgmt. Network | 2x 1GB Ethernet NICs | |
| Dell PE R515 | Processor | 1x hex-core Opteron CPU |
| RAM | 16 GB | |
| Volume Storage | 12x 3TB drives. Storage | |
| OS Storage | 1x 500GB drive. Operating System. | |
| Client Network | 2x 1GB Ethernet NICs | |
| OSD Network | 2x 1GB Ethernet NICs | |
| Mgmt. Network | 2x 1GB Ethernet NICs |