Chapter 4. Minimum Recommendations

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Process	Criteria	Minimum Recommended
`RHSC`	Processor	1x AMD64 or Intel 64 quad-core
	RAM	4 GB minimum per instance
	Disk Space	10 GB per instance
	Network	2x 1GB Ethernet NICs
`ceph-osd`	Processor	1x AMD64 or Intel 64
	RAM	Red Hat typically recommends a baseline of 16GB of RAM per OSD host, with an additional 2 GB of RAM per daemon
	OS Disk	1x OS disk per host
	Volume Storage	1x storage drive per daemon
	Journal	1x SSD partition per daemon (optional)
	Network	2x 1GB Ethernet NICs
`ceph-mon`	Processor	1x AMD64 or Intel 64
	RAM	1 GB per daemon
	Disk Space	10 GB per daemon
	Monitor Disk	1x SSD disk for `leveldb` monitor data (optional).
	Network	2x 1GB Ethernet NICs
`RGW`	Processor	1x AMD64 or Intel 64
	RAM	1 GB per daemon
	Disk Space	5 GB per daemon
	Network	1x 1GB Ethernet NICs
`ceph-mds`	Processor	1x AMD64 or Intel 64
	RAM	2 GB per daemon This number is highly dependent on the configurable MDS cache size. Note also that this is the memory for your daemon, not the overall system memory.
	Disk Space	2 MB per daemon, plus any space required for logging, which might vary depending on the configured log levels
	Network	2x 1GB Ethernet NICs Note that this is the same network as the OSDs. If you have a 10 GB network on your OSDs you should use the same on your MDS so that the MDS is not disadvantaged when it comes to latency.