This page includes a summary of differences to keep in mind when migrating jobs from other clusters to Ascend.
Guidance for Pitzer Users
Hardware Specifications
| Ascend (PER NODE) | Pitzer (PER NODE) | ||
|---|---|---|---|
| Regular compute node | n/a |
40 cores and 192GB of RAM 48 cores and 192GB of RAM |
|
| Huge memory node |
n/a |
48 cores and 768GB of RAM (12 nodes in this class) 80 cores and 3.0 TB of RAM (4 nodes in this class) |
|
| GPU Node |
88 cores and 921GB RAM 4 GPUs per node (24 nodes in this class) |
40 cores and 192GB of RAM, 2 GPUs per node (32 nodes in this class) 48 cores and 192GB of RAM, 2 GPUs per node (42 nodes in this class) |
|
Guidance for Owens Users
Hardware Specifications
| Ascend (PER NODE) | Owens (PER NODE) | ||
|---|---|---|---|
| Regular compute node | n/a | 28 cores and 125GB of RAM | |
| Huge memory node | n/a |
48 cores and 1.5TB of RAM (16 nodes in this class) |
|
| GPU node |
88 cores and 921GB RAM 4 GPUs per node (24 nodes in this class) |
28 cores and 125GB of RAM, 1 GPU per node (160 nodes in this class) |
|
File Systems
Ascend accesses the same OSC mass storage environment as our other clusters. Therefore, users have the same home directory, project space, and scratch space as on the other clusters.
Software Environment
Ascend uses the same module system as other OSC Clusters.
Use module load <package> to add a software package to your environment. Use module list to see what modules are currently loaded and module avail to see the modules that are available to load. To search for modules that may not be visible due to dependencies or conflicts, use module spider .
You can keep up to on the software packages that have been made available on Ascend by viewing the Software by System page and selecting the Ascend system.
Programming Environment
C, C++ and Fortran are supported on the Ascend cluster. Intel, oneAPI, GNU, nvhpc, and aocc compiler suites are available. The Intel development tool chain is loaded by default. To switch to a different compiler, use module swap . Ascend also uses the MVAPICH2 implementation of the Message Passing Interface (MPI).
See the Ascend Programming Environment page for details.
