Cluster/Computing-clusters.md

+# Local
+
+## Puck and Oberon (CPU)
+
+* [Official instructions to use local clusters](http://users.jyu.fi/%7Eveapaja/FGCI-instructions.JYU.txt)
+* If you need access, contact [Vesa Apaja](https://www.jyu.fi/fi/henkilot/vesa-apaja)
+
+## GPU
+
+* Available from IT, Dana knows
+
+# CSC
+
+Our CSC project manager: [Harri Niemi](https://www.jyu.fi/fi/henkilot/harri-niemi). To get access, first create a csc account at my.csc.fi (use Haka = your JYU account). Then let Harri know what is your CSC usernmae.
+
+Puhti and Mahti. Puhti for smaller jobs, Mahti if you really can take advantage of having a large number of threads. If unsure, use Puhti.
+
+Example submission script (1 cpu job), note that you need to specify account and partition
+
+```bash
+    #SBATCH -n 1 
+    #SBATCH -t 0-01:00:0
+    #SBATCH -p small 
+    #SBATCH --account=lappi
+    ./program
+```
+
+Resources
+
+- [Puhti and Mahti partitions](https://docs.csc.fi/computing/running/batch-job-partitions/)
+- [Puhti and Mahti storage](https://docs.csc.fi/computing/disk/): use _/scratch/lappi_ for data, _/projappl/lappi_ for code. Note that scratch is cleaned, and files older than 180days are automatically removed.
+
+In addition to CPU quota, we have limited disc space. Also the number of files is limited. To see the current usage and limits, run _csc-workspaces_
+
+Use the following command to count files in the current directory:
+
+```bash
+     find . -maxdepth 1 -type d -print0 | xargs -0 -I {} sh -c 'echo -e $(find {} | wc -l) {}' | sort -n
+```
+(Do not use that extensively, it creates a lot of disc i/o activity and CSC admins do not like that I guess, but use if you need to figure out if you are consuming all our number of files quota).
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