Stuff
public text v1 · immutable+----- WEB01 -----+ +----- WEB02 -----+
| | | |
| Apache + PHP | | Apache + PHP |
| Apc | | Apc |
| mongos | | mongos |
+-----------------+ +-----------------+
+----- DB01 -----+ +----- DB02 -----+
| | | |
| replica set 1 | | replica set 1 |
| replica set 2 | | replica set 2 |
| replica set 3 | | replica set 3 |
| mongo config | | mongo config |
+----------------+ +----------------+