Ohm appears as follows:
The two sides are the 16 slave nodes. In the middle are the 100Mbit hub, the firewall, ohm-master1, ohm-master2, the gigabit switch, the two KVM switches, and the spare node. The white boxes at the bottom are UPS's.
The network layout is initially:
---------- -----------
| | | |
| Slave0 | . . . . | Slave15 |
| | | |
---------- -----------
\ | /
----------------
|Gigabit Switch|
----------------
| |
----------- -----------
| | | |
| Master1 | | Master2 |
| | | |
----------- -----------
\ /
-------------
|100Mbit Hub|
-------------
|
------------
| |
| Firewall |
| |
------------
|
Internet
(The master nodes do not forward packets, so the gigabit network is self-contained).
Later, two additional network cards will be added to each slave node to form a ring topology. Eventually, more cards will be added to make it into a hypercube.
Each node consists of a Gigahertz Athlon, a Gigabyte of memory, a SysKonnect SK98 Gigabit ethernet card, 20Gb hard drive, and a floppy drive.
The gigabit switch is an Extreme Networks Summit 7i
The KVM's are Belkin OmniView(tm) PRO 16-PORT
The UPS's are Tripp-Lite SmartPro 2200
The firewall is an old 200Mhz Pentium
The computers are all running Redhat 7.1. (Except the firewall which is running Redhat 6.2, with updated firewalling tools).
All of the nodes NFS mount /home and /7.1 from master1. /home contains users home directories (of course). /7.1 contains system specific tools such as the RedHat installation CD's, customizations performed during installation, and other files useful for running the cluster.