64 lines
3.8 KiB
Markdown
64 lines
3.8 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 recources of Merlin6.
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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 | #Threads | CPU | Memory | Scratch | Scratch Mountpoint |
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| ------------------- | --- | --------- | ------ |:--------:| :-------------------- | ------ | ---------- | :------------------ |
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| merlin-l-001.psi.ch | yes | yes | 2 x 22 | 2 | Intel Xeon Gold 6152 | 384GB | 1.8TB NVMe | ``/scratch`` |
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| merlin-l-002.psi.ch | yes | yes | 2 x 22 | 2 | Intel Xeon Gold 6142 | 384GB | 1.8TB NVMe | ``/scratch`` |
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| merlin-l-01.psi.ch | yes | - | 2 x 16 | 2 | Intel Xeon E5-2697Av4 | 512GB | 100GB SAS | ``/scratch`` |
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---
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## Remote Access
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### SSH Access
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For interactive command shell access, use an SSH client. We recommend to activate SSH's X11 forwarding to allow you to use graphical
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applications (e.g. a text editor, but for more performant graphical access, refer to the sections below). X applications are supported
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in the login nodes and X11 forwarding can be used for those users who have properly configured X11 support in their desktops, however:
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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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* Nevertheless, a generic guide for X11 client setup (*Linux*, *Windows* and *MacOS*) is provided below.
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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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#### Accessing from a Linux client
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Refer to [{Accessing Merlin -> Accessing from Linux Clients}](/merlin6/connect-from-linux.html) for **Linux** SSH client and X11 configuration.
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#### Accessing from a Windows client
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Refer to [{Accessing Merlin -> Accessing from Windows Clients}](/merlin6/connect-from-windows.html) for **Windows** SSH client and X11 configuration.
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#### Accessing from a MacOS client
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Refer to [{Accessing Merlin -> Accessing from MacOS Clients}](/merlin6/connect-from-macos.html) for **MacOS** SSH client and X11 configuration.
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### Graphical access using **NoMachine** client
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X applications are supported in the login nodes and can run efficiently through a **NoMachine** client. This is the officially supported way to run more demanding X applications on Merlin6. The client software can be downloaded from [the Nomachine Website](https://www.nomachine.com/product&p=NoMachine%20Enterprise%20Client).
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* Install the NoMachine client locally. For PSI windows machines, this can be installed from the Software Kiosk as 'NX Client'. If you have difficulties installing, please request support through **[PSI Service Now](https://psi.service-now.com/psisp)** as an *Incident Request*.
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* Configure a new connection in no machine to either `merlin-l-001.psi.ch` or `merlin-l-002.psi.ch`. The 'NX' protocol is recommended. Login nodes are available from the PSI network or through VPN.
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* You can also connect via the photo science division's `rem-acc.psi.ch` jump point. After connecting you will be presented with options to jump to the merlin login nodes. This can be accessed remotely without VPN.
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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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