Differences
This shows you the differences between two versions of the page.
Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
services:computing:hpc [2021/05/24 15:06] calucci filesystems & backups |
services:computing:hpc [2021/09/06 12:10] calucci [Hardware and Software] |
||
---|---|---|---|
Line 7: | Line 7: | ||
- | Ulysses v2 can be accessed via the login nodes at ''frontend1.hpc.sissa.it'' or ''frontend2.hpc.sissa.it'' from SISSA network or from SISSA [[:vpn|VPN]]. More access options might be made available in due time. | + | SSH access to Ulysses v2 is provided via the login nodes at ''frontend1.hpc.sissa.it'' or ''frontend2.hpc.sissa.it'' from SISSA network or from SISSA [[:vpn|VPN]]. More access options might be made available in due time. |
===== Hardware and Software ===== | ===== Hardware and Software ===== | ||
Line 22: | Line 22: | ||
The software tree is the same you have on Linux workstations, with the same [[services:modules|Lmod modules]] system (with the only exception of desktop-oriented software packages). | The software tree is the same you have on Linux workstations, with the same [[services:modules|Lmod modules]] system (with the only exception of desktop-oriented software packages). | ||
+ | |||
+ | A small number of POWER9-based nodes are also available (2 sockets, 16 cores, 4 threads per core; 256GB RAM) with 2 or 4 Tesla V100. Please note that you cannot run x86 code on POWER9. | ||
===== Queue System ===== | ===== Queue System ===== | ||
Line 34: | Line 36: | ||
* **''long1''** and **''long2''**: max 8 nodes, max 48h | * **''long1''** and **''long2''**: max 8 nodes, max 48h | ||
* **''gpu1''** and **''gpu2''**: max 4 nodes, max 12h | * **''gpu1''** and **''gpu2''**: max 4 nodes, max 12h | ||
+ | * **''power9''**: max 2 nodes, max 24h | ||
<note tip>Please note that hyperthreading is enabled on all nodes (it was disabled on old Ulysses). If you **do not** want to use hyperthreading, the ''%%--hint=nomultithread%%'' options to srun/sbatch will help. | <note tip>Please note that hyperthreading is enabled on all nodes (it was disabled on old Ulysses). If you **do not** want to use hyperthreading, the ''%%--hint=nomultithread%%'' options to srun/sbatch will help. | ||
Line 68: | Line 71: | ||
</code> | </code> | ||
+ | <note warning>Please note that MPI jobs are only supported if they allocate all available core/threads on each node (so 20c/40t on *1 partitions and 32c/64t on *2 partitions. In this context, //not supported// means that jobs using fewer cores/threads than available may or may not work, depending on how cores //not// allocated to your job are used.</note> | ||
===== Filesystem Usage and Backup Policy ===== | ===== Filesystem Usage and Backup Policy ===== | ||