hpc2 is an SGI Origin 2200 configured with 16 node cards each node card contains 2 CPUs, memory and a network interface card. The network interface connection is capable of 130 MB/s peak transfer rate.
Each CPU is a MIPS R12000 processor running at 300 MHz (peak theoretical 1.2Gflops), and has separate on-chip 32 KB data and instruction caches, and an 8 MB off chip unified cache.
Each pair of CPUs shares between 1.5 and 2 Gigabytes of memory, yielding a system total of 28 Gbytes. All 28 GB is accessible to a single process. Off-node memory is processed slower than on-node memory, however, but off-node memory should not usually be needed, unless you are running a shared memory parallel program or using more than 1 GB/proc. In addition, off-node memory can be locally cached, so cache efficient algorithms work well even when using off-node memory.
| CPU | CPU speed | Cache/CPU | Total Memory | Swap | Disk |
|---|---|---|---|---|---|
| Mips R12000 | 32 @ 300 Mhz | 8 MB/proc | 28 GB | 17 GB | 150 GB |
User Disk space configuration
*) 8 GB Root disk : System software, swap space, and /tmp
*) 8 GB staging disk /staging:
*) 51 GB Temporary Volume /scratch5 ( 3 17GB drives striped across 3 controllers. )
The temporary volume /scratch5 is striped across 3 controllers.
giving a peak non-buffered transfer rate of 60 MB/sec. This is accessible
only a $TMPDIR in a PBS batch job. Each users may have up to
10 Gbytes of $TMPDIR space at any one time.
External Network connection:
hpc2 is equipped with a Gigabit Ethernet connection to the campus
backbone for fast access to the AFS File Servers and the Private
File Servers.
hpc2 is also connected to hpc1 via a private gigabit ethernet
over which home directories, /staging, and /scratch* directories are
cross-mounted between hpc1 and hpc2. This allows access to both
sets of disks no matter which machine a user is running on with no
change in names. The access is slightly slower than local access,
but is noticable only for codes which are I/O bound on the local machine.
The password are kept the same on both systems. Password changes should
be made on hpc1 or they will be lost.