ADD: small introduction to Merlin7

pages/merlin7/slurm-configuration.md

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+---
+title: Slurm cluster 'merlin7'
+#tags:
+keywords: configuration, partitions, node definition
+last_updated: 24 Mai 2023
+summary: "This document describes a summary of the Merlin6 configuration."
+sidebar: merlin7_sidebar
+permalink: /merlin7/slurm-configuration.html
+---
+
+This documentation shows basic Slurm configuration and options needed to run jobs in the Merlin7 cluster.
+
+### Infrastructure
+
+#### Hardware
+
+The current configuration for the _test_ phase is made up as:
+
+* 9 nodes for the _PSI-Dev_ development system
+  * 8 nodes were meant for baremetal and k8s
+  * 1 login node
+
+| Node | CPU | RAM | GRES | Notes |
+| ---- | --- | --- | ---- | ----- |
+| Compute node | _2x_ AMD EPYC 7713 (x86_64 Milan, 64 Cores, 3.2GHz) | 512GB DDR4 3200Mhz | _4x_ NVidia A100 (Ampere, 80GB) | |
+| Login node | _2x_ AMD EPYC 7742 (x86_64 Rome, 64 Cores, 3.2GHz) | 512GB DRR4 3200Mhz | | |
+
+#### Storage
+
+* CephFS only for `/home` -- 1 TB
+* ClusterStor L300 for `/scratch` -- 224 TB usable space
+* CephRBD `/local` -- 100GB
+
+#### Node IDs
+
+Cray user various identifies to uniquely label each node, details on this can be found on the [Crayism page](cray-conventions.html).
+The table below collates these together for the current configuration:
+
+| Node ID | Cray XNAME | Notes |
+| ---------- | ---------- | - |
+| nid003204 | x1500c4s7b0n0 | login node, to which **psi-dev.cscs.ch** points |
+| nid002808 | x1007c0s4b0n0 | |
+| nid002809 | x1007c0s4b0n1 | |
+| nid002812 | x1007c0s5b0n0 | |
+| nid002813 | x1007c0s5b0n1 | |
+| nid002824 | x1007c1s0b0n0 | |
+| nid002825 | x1007c1s0b0n1 | |
+| nid002828 | x1007c1s1b0n0 | |
+| nid002829 | x1007c1s1b0n1 | |