Select a mirror server host with the following characteristics:
This server runs on either CentOS (v5.x, v6.x) or RHEL (v5.x, v6.x) or SLES (v11) and has several GB of storage available.
This server and the cluster nodes are all running the same OS.
![[Note]](../common/images/admon/note.png)
Note To support repository mirroring for heterogeneous clusters requires a more complex procedure than the one documented here.
The firewall allows all cluster nodes (the servers on which you want to install HDP) to access this server.
