caubet_m
17053a363f
All checks were successful
Build and deploy documentation / build-and-deploy-docs (push) Successful in 24s
41 lines
2.2 KiB
Markdown
41 lines
2.2 KiB
Markdown
# Introduction
|
|
|
|
## The Merlin local HPC cluster
|
|
|
|
Historically, the local HPC clusters at PSI were named **Merlin**. Over the years,
|
|
multiple generations of Merlin have been deployed.
|
|
|
|
Access to the different Slurm clusters is possible from the [**Merlin login nodes**](accessing-interactive-nodes.md),
|
|
which can be accessed through the [SSH protocol](accessing-interactive-nodes.md#ssh-access) or the [NoMachine (NX) service](../how-to-use-merlin/nomachine.md).
|
|
|
|
The following image shows the Slurm architecture design for the Merlin5 & Merlin6 (CPU & GPU) clusters:
|
|
|
|
|
|
|
|
### Merlin6
|
|
|
|
Merlin6 is a the official PSI Local HPC cluster for development and
|
|
mission-critical applications that has been built in 2019. It replaces
|
|
the Merlin5 cluster.
|
|
|
|
Merlin6 is designed to be extensible, so is technically possible to add
|
|
more compute nodes and cluster storage without significant increase of
|
|
the costs of the manpower and the operations.
|
|
|
|
Merlin6 contains all the main services needed for running cluster, including
|
|
**login nodes**, **storage**, **computing nodes** and other _subservices_,
|
|
connected to the central PSI IT infrastructure.
|
|
|
|
#### CPU and GPU Slurm clusters
|
|
|
|
The Merlin6 **computing nodes** are mostly based on **CPU** resources. However,
|
|
in the past it also contained a small amount of **GPU**-based resources, which were mostly used
|
|
by the BIO Division and by Deep Leaning projects. Today, only Gwendolen is available on `gmerlin6`.
|
|
|
|
These computational resources are split into **two** different **[Slurm](https://slurm.schedmd.com/overview.html)** clusters:
|
|
|
|
* The Merlin6 CPU nodes are in a dedicated **[Slurm](https://slurm.schedmd.com/overview.html)** cluster called [**`merlin6`**](../slurm-configuration.md).
|
|
* This is the **default Slurm cluster** configured in the login nodes: any job submitted without the option `--cluster` will be submited to this cluster.
|
|
* The Merlin6 GPU resources are in a dedicated **[Slurm](https://slurm.schedmd.com/overview.html)** cluster called [**`gmerlin6`**](../../gmerlin6/slurm-configuration.md).
|
|
* Users submitting to the **`gmerlin6`** GPU cluster need to specify the option ``--cluster=gmerlin6``.
|