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--- cluster:93 [2011/01/07 20:31]
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 ===== Design =====
+The purchase of the HP hardware followed a fierce bidding round in which certain design aspects had to met.
+  * We continually run of disk space for our home directories.  So the new cluster had to have a large disk array on board.
+  * We wanted more nodes, in fewer queues, with a decent memory footprint.
+  * All nodes should be on an Infiniband switch.
+  * A single queue is preferred.
+  * Data (NFS) was to be served up via a secondary gigabit ethernet switch, hence not compete with administrative traffic.
+  * (With the HP solution we will actually route data (NFS) traffic over the infiniband switch, a practice called IPoIB)
+  * Linux or CentOS as operating system.
+  * Flexible on scheduler (options: Lava, LSF, Sun Grid Engine)
+  * The disk array, switches and login node should be backed by some form of UPS (not the compute nodes)
+  * (We actually have moved those to our enterprise data center UPS, which is backed by building generator)
 ===== Performance =====
+During the scheduled power outage of December 28th, 2010, some benchmarks were performed on old and new clusters.  To read about the details of all that, view this [[cluster:91|page]].
 ===== Home Dirs =====

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