How to Use the Clusters
How to Use Trestles...
Trestles has about 240 usable identical nodes, each with four AMD 6136 8-core 2.4 GHz processors. Each node has 64GB of memory and a flash drive with about 90GB usable for temporary space in /local_scratch/$USER/, much less local storage than Razor nodes, but it's faster. Nodes are interconnected with Mellanox QDR Infiniband. Each 32-core node has about the same computational power as the 16-core Intel nodes in the Razor cluster, so an AMD core is about half the power of an Intel core for these models. Because Trestles has more cores which are less powerful, it is most suitable for highly scalable codes, that is codes with good parallel performance, and also for codes that require more than the 24 to 32 GB of memory on most Razor nodes.
How to Use Razor...
Razor has several partitions: Razor I (128 12-core nodes, dual X5670 processor, 24GB memory except 4 nodes have 96GB), Razor II (112 16-core nodes, dual E5-2670 processor, 32GB memory), and 10 large-memory four-socket nodes, some condo, of 256GB-3024GB memory. There is also a condo partition Razor III (64 16-core nodes, dual E5-2650V2 processor, 64GB memory) which will move to the Trestles cluster. Each node has a local hard drive with 900-1800GB usable for temporary space in /local_scratch/$USER/. Nodes are interconnected with QLogic QDR Infiniband. Operating system is Centos 6.5.