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
| 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 |
| 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 |