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Availability : March, 2019
Login node : beluga.computecanada.ca
Globus Endpoint : computecanada#beluga-dtn
Data Transfer Node (rsync, scp, sftp,...) : beluga.computecanada.ca

Béluga is a general purpose cluster designed for a variety of workloads and situated at the École de technologie supérieure in Montreal. The cluster is named in honour of the St. Lawrence River's Beluga whale population.

Site-specific policies

By policy, Béluga's compute nodes cannot access the internet. If you need an exception to this rule, contact technical support with information about the IP address, port number(s) and protocol(s) needed as well as the duration and a contact person.

Crontab is not offered on Béluga.

Each job on Béluga should have a duration of at least one hour and a user cannot have more than 1000 jobs, running and queued, at any given moment.

Storage

HOME Lustre filesystem, 105 TB of space	Location of home directories, each of which has a small fixed quota. You should use the `project` space for larger storage needs. 50 GB of space and 500K files per user. There is a daily backup of the home directories.
SCRATCH Lustre filesystem, 2.6 PB of space	Large space for storing temporary files during computations. No backup system in place. 20 TB of space and 1M files per user. There is an automated purge of older files in this space.
PROJECT Lustre filesystem, 8.9 PB of space	This space is designed for sharing data among the members of a research group and for storing large amounts of data. 1 TB of space and 500K of files per group. There is a daily backup of the project space.

For transferring data via Globus, you should use the endpoint computecanada#beluga-dtn, while for tools like rsync and scp you can use a login node.

High-performance interconnect

Le réseau Infiniband EDR (100 Gb/s) de Mellanox relie tous les nœuds de la grappe. Un commutateur central de 324 ports rassemble les connexions des îlots avec un facteur de blocage maximum de 5:1. Les serveurs de stockage sont branchés avec une interconnexion non bloquante. L’architecture permet de multiples tâches parallèles avec jusqu’à 640 cœurs (voire plus) grâce à une réseautique non bloquante. Pour les tâches plus imposantes, le facteur de blocage est de 5:1; même pour les tâches exécutées sur plusieurs îlots, l’interconnexion est de haute performance.

Types et caractéristiques des nœuds

Nombre	Type	Cœurs	Mémoire	Matériel
172	small 96G	40	93G ou 96000M	deux Intel Gold 6148 Skylake à 2.4 GHz; SSD de 480Go à 6Gbps
516	base 192G	40	187G ou 192000M	mêmes que small
12	large 768G	40	750G ou 768000M	mêmes que small
172	GPU	40	187G ou 192000M	mêmes que small, mais quatre GPU NVIDIA V100 Volta (SXM2, mémoire de 16 Go HBM2), SSD NVMe de 1.6 To