Metacat 1 HZ             <--> SystemMetadata <-->          Metacat 2 HZ
port 5701                                                                                  port 5701
    /|\                                                                                                /|\
     |                                                                                                  |
    \|/                                                                                                \|/
 SystemMetadata                                                            SystemMetadata
    /|\                                                                                                /|\
     |                                                                                                  |
    \|/                                                                                                 \|/
Batch Process HZ Client                                             Batch Process HZ Client
port 5701                                                                               port 5701
    |                                                                                               |
Batch Process 1 HZ     <--> Distributed Executable <--> Batch Process 2 HZ
port 5702                                                                                  port 5702