Ulysses Login Nhs

[Awilda]

Thedifference between paying your bill online and paying your bill online using quick pay is the amount of access you will have to your account; both options require a login through SmartHub. Quick pay only requires your account number and last name to pay your bill and you will only be able pay your bill. You will not have access to your billing and usage history, the ability to report an outage or autopay options. If you want unlimited access to your account and the ability to view and pay your bill, access your billing and usage history and report an outage, you will need to login to SmartHub, using your designated email and password combination.

The Ulysses cluster v2 is available for scientific computation to all SISSA users. If you have an active SISSA account, please write to helpde...@sissa.it in order to have it enabled on Ulysses.

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. More access options might be made available in due time.

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. For an interactive shell on a P9 machine, please type p9login on frontend[12].

You should always use the --mem slurm option to specify the amount of memory needed by your job; --mem-per-cpu is also possible, but not recommended due to the scheduler configuration. This is especially important if your jobs doesn't use all available CPUs on a node (40 threads on IBM nodes, 64 on HP) and failing to do so will negatively impact the scheduling performance.

/home and /scratch are both general-purpose filesystems, they are based on the same hardware and provide the same performance level. When you first login on Ulysses, /home/$USER comes pre-populated with a small number of files that provide some reasonable configuration defaults. At the same time, /scratch/$USER is created for you where you have write permission.

Default quotas are 200GB on /home and 5TB on /scratch; short-term users (e.g. accounts created for workshops, summer schools and other events, that usually expire in a matter of weeks) are usually given smaller quotas in agreement with workshop organizers. On special and motivated request a larger quota can be granted: please write to helpde...@sissa.it, Cc: your supervisor (if applicable) with your request; please note that the storage resource is limited, and not every request can be granted.

Daily backups are taken of /home, while no backup is available for /scratch. If you need to recover some deleted or damaged file from a backup set, please write to helpde...@sissa.it. Daily backups are kept for one week, a weekly backup is kept for one month, and monthly backups are kept for one year.

An experimental energy accounting system has been enabled on Ulysses, and energy usage estimates are reported in end-job notification. This is intended as a very rough estimate of the energy impact your job has, but is not accurate enough to be used for proper cost/energy/environmental accounting. Known limits of the energy accounting system in use include:

Each summary reports includes the number of jobs that completed their lifecycle during the selected interval along with the total amount of CPU*hours consumed and and estimation of total energy consumption; the number of jobs in each partition; and the final states of completed jobs (usually one of COMPLETED, TIMEOUT, CANCELLED, FAILED or OUT_OF_MEMORY). Optionally a detailed listing of all jobs can be included as an attachment (this will be a Zip-ed CSV file that can be further processed with your software of choice, but it is also human-readable).

To enable the reports with the default options (no daily report; weekly report with jobs detail and monthly report delivered to your_u...@sissa.it) just create an empty .slurm_report file in your home directory on Ulysses:

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