Hopper
Current Status: Up
Hopper is NERSC's first peta-flop system, a Cray XE6, with a peak performance of 1.28 Petaflops/sec, 153,216 compute cores, 212 Terabytes of memory, and 2 Petabytes of disk. Hopper placed number 5 on the November 2010 Top500 Supercomputer list.
Updates and Status
Find information on known problems, open issues, and recent announcements. Read More »
Configuration
NERSC's Cray XE6, Hopper, has a peak performance of 1.28 Petaflops/sec, 153,216 processors cores for running scientific applications, 212 TB of memory, and 2 Petabytes of online disk storage. Read More »
Programming
Find information on how to compile your application, use MPI and OpenMP optimally, and use Cray's scientific libraries. Read More »
Running Jobs
Learn how to submit a job to the queues and use the 'aprun' job launch command, monitor your job in the queue and job exit status. Also find information on OpenMP and MPI runtime settings as well as general application tuning options. Read More »
File Storage and I/O
The Hopper system has 5 different file systems mounted which provide different levels of disk storage, I/O performance and file permanence. Find information on I/O optimization, disk quotas and purging. Read More »
Software and Tools
The table below shows the software installed on Hopper that is managed by modules. Read More »
Debugging and Profiling
Information on how to use debugging and profiling tools on the Hopper system including DDT, Totalview, IPM, and Craypat. Read More »
Performance and Optimization
Hopper performance graphs, benchmarking results and compiler comparisons. Read More »
Cluster Compatibility Mode
Cluster Compatibility Mode (CCM) allows users to run standard ISV applications and other applications that need to use sockets on the Hopper system. Read More »
