JADE (SGI ALTIX ICE)

The cluster SGI Altix ICE 8200, JADE, is a scalar parallel supercomputer with a peak performance of 147 Tflop/s. JADE is composed of 25 racks . One of these racks is used to ensure the connection with the whole cluster (via 3 login nodes) and 24 computing racks (cf. architecture’s description). This cluster consists of 12288 cores distributed on 1536 nodes (each node including 2 Intel Quad-Core E5472 processors). 30 GB of useful memory can be actually used on each node, i.e. over a total of 46 TB. The computing racks have access to a parallel file system Lustre with a total capacity of (509 TB (cf. Scheme of JADE).

The cooling is ensured by a air/water system with high efficiency .

# Account Opening

In order to get an account on JADE you need to ask for resources first. The call starts usually in October and a scientific committee decides whether or not to give the allocation for the next year depending on the project.

# Job Accounting

The job accounting is based on the elapsed time that the resources are booked and no more on the CPU time. The formula is as follows : elapsed time x Number of nodes x number of cores per node. Here the number of nodes is the number of nodes dedicated to the job and the number of cores is fixed to 8 .