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Technical Summary

1. Expanse is a dedicated eXtreme Science and Engineering Discovery Environment (XSEDE) cluster designed by Dell and SDSC delivering 5.16 peak petaflops.
2. Expanse noun area, range, field, space, stretch, sweep, extent, plain, tract, breadth a vast expanse of grassland Collins Thesaurus of the English Language – Complete and Unabridged 2nd Edition.

Expanse is a dedicated eXtreme Science and Engineering Discovery Environment (XSEDE) cluster designed by Dell and SDSC delivering 5.16 peak petaflops, and will offer Composable Systems and Cloud Bursting.

Expanse Download ssh for mac. 's standard compute nodes are each powered by two 64-core AMD EPYC 7742 processors and contain 256 GB of DDR4 memory, while each GPU node contains four NVIDIA V100s (32 GB SMX2) connected via NVLINK and dual 20-core Intel Xeon 6248 CPUs. Expanse also has four 2 TB large memory nodes.

Expanse is organized into 13 SDSC Scalable Compute Units (SSCUs), comprising 728 standard nodes, 54 GPU nodes and 4 large-memory nodes. Every Expanse node has access to a 12 PB Lustre parallel file system (provided by Aeon Computing) and a 7 PB Ceph Object Store system. Expanse uses the Bright Computing HPC Cluster management system and the SLURM workload manager for job scheduling.

Expanse supports the XSEDE core software stack, which includes remote login, remote computation, data movement, science workflow support, and science gateway support toolkits.

Expanse is an NSF-funded system operated by the San Diego Supercomputer Center at UC San Diego, and is available through the XSEDE program.

NEW! The Expanse User Portal is a gateway for launching interactive applications such as MATLAB, and an integrated web-based environment for file management and job submission. All Expanse users with XSEDE accounts have access via their XSEDE credentials.

Resource Allocation Policies

• The maximum allocation for a Principle Investigator on Expanse is 15M core-hours and 100K GPU hours. Limiting the allocation size means that Expanse can support more projects, since the average size of each is smaller.
• Access via Science Gateways can request more than the 15M core-hour limit.

Job Scheduling Policies

• The maximum allowable job size on Expanse is 4,096 cores – a limit that helps shorten wait times since there are fewer nodes in idle state waiting for large number of nodes to become free.
• Expanse supports long-running jobs - run times can be extended to one week. Users requests will be evaluated based on number of jobs and job size.
• Expanse supports shared-node jobs (more than one job on a single node). Many applications are serial or can only scale to a few cores. Allowing shared nodes improves job throughput, provides higher overall system utilization, and allows more users to run on Expanse.

Expanse Book Series

Technical Details

Expanse Season 4

Systems Software Environment

Expanse Season 5