===== Serendipity Cluster =====

One of the clusters at the University is the Serendipity Cluster

This HPC cluster is a collection of many separate servers (computers), called nodes, which are connected via a fast interconnect.

There may be different types of nodes for different types of tasks. The HPC cluster listed on this wiki has

a headnode or login node, where users log in
  * regular compute nodes (where computations are running)

This cluster is based on the **[[https://www.schedmd.com/index.php|Slurm scheduler]]** running on Ubuntu.

=== Hardware Specifications Serendipity Cluster ===

^Node name^OS^Cores^Memory^CPU^purchase date^
| serendipity | Ubuntu 20.04 | 28 cores | 256 Gb | Xeon CPU E5-2680 v4 @ 2.40GHz | 13 December 2016 |
| serendipity01-16 | Ubuntu 20.04 | 40 cores | 256 Gb | Xeon CPU E5-2698 v4 @ 2.20GHz | 13 December 2016 |
  
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The nodes are connected by InfiniBand and the cluster is located in "het SeinHuis".

===  Login Nodes === 
You can connect to the headnode : serendipity.ewi.utwente.nl\\
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==== Slurm ====
We now use the new Slurm scheduler instead of searching for a free node and run our calculations\\
for info see [[slurm:start|Slurm]] and [[https://slurm.schedmd.com/quickstart.html|the Slurm quickstart]]
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