58 lines
2.9 KiB
Markdown
58 lines
2.9 KiB
Markdown
---
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title: Accessing Interactive Nodes
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#tags:
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#keywords:
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last_updated: 13 June 2019
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#summary: ""
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sidebar: merlin6_sidebar
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permalink: /merlin6/interactive.html
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---
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## Login nodes description
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The Merlin6 login nodes are the official machines for accessing the Merlin6 cluster.
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From these machines, users can submit jobs to the Slurm batch system as well as visualize or compile their software.
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The Merlin6 login nodes are the following:
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| Hostname | SSH | NoMachine | #cores | CPU | Memory | Scratch | Scratch Mountpoint |
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| ------------------- | --- | --------- | ----------- |:---------------------------------- | ------ | ---------- |:------------------ |
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| merlin-l-01.psi.ch | yes | - | 32 (2 x 16) | 2 x Intel Xeon E5-2697A v4 2.60GHz | 512GB | 100GB SAS | ``/scratch`` |
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| merlin-l-02.psi.ch | yes | yes | 32 (2 x 16) | 2 x Intel Xeon E5-2697A v4 2.60GHz | 512GB | 100GB SAS | ``/scratch`` |
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| merlin-l-001.psi.ch | - | - | 44 (2 x 22) | 2 x Intel Xeon Gold 6152 2.10GHz | 512GB | 2.0TB NVMe | ``/scratch`` |
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| merlin-l-002.psi.ch | - | - | 44 (2 x 22) | 2 x Intel Xeon Gold 6142 2.10GHz | 512GB | 2.0TB NVMe | ``/scratch`` |
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* ``merlin-l-001`` and ``merlin-l-002`` are not in production yet, hence SSH access is not possible.
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---
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## Remote Access
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### SSH Access
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For interactive command access, use a SSH client. We recommend to use X11 forwarding, despite is not the official way supported. It may help opening X applications.
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For Linux:
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```bash
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ssh -XY $username@merlin-l-01.psi.ch
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```
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X applications are supported in the login nodes and X11 forwarding can be used for those users who have properly configured X11 support in their desktops:
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* Merlin6 administrators **do not offer support** for user desktop configuration (Windows, MacOS, Linux).
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* Hence, Merlin6 administrators **do not offer official support** for X11 client setup.
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* However, a generic guide for X11 client setup (Windows, Linux and MacOS) will be provided.
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* PSI desktop configuration issues must be addressed through **[PSI Service Now](https://psi.service-now.com/psisp)** as an *Incident Request*.
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* Ticket will be redirected to the corresponding Desktop support group (Windows, Linux).
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### NoMachine Access
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X applications are supported in the login nodes and can run through NoMachine. This service is officially supported in the Merlin6 cluster and is the official X service.
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* NoMachine *client installation* support has to be requested through **[PSI Service Now](https://psi.service-now.com/psisp)** as an *Incident Request*.
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* Ticket will be redirected to the corresponding support group (Windows or Linux)
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* NoMachine *client configuration* and *connectivity* for Merlin6 is fully supported by Merlin6 administrators.
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* Please contact us through the official channels on any configuration issue with NoMachine.
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---
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