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 # SPMT
 
-Anything related to SPMT
\ No newline at end of file
+Anything related to SPMT.
+
+## Dashboard
+
+Guides:
+  - [Best Practice -- Storage on Hawk](guides/Best_practise--Storage_on_Hawk.md)
+
+
+
diff --git a/guides/Best_practice--Storage_on_Hawk.md b/guides/Best_practice--Storage_on_Hawk.md
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+# Best practice -- Storage on Hawk 
+
+ Change history: 
+  - Initial version ; Jose Gracia, 7 May 2024
+
+TODOs:
+  - [Cleanup after parallel job](Best_practice--Storage_on_Hawk.md#Cleanup%20after%20parallel%20job): check if there is a HLRS recommendation to copy files from workspaces.
+
+
+## Available filesystems
+
+`$HOME`
+  - get current quota: `$ na_quota`
+  - group quota: 200 GB, no files limit
+  - user quota: 50 GB, no files limit
+  - mounted via NFS; relatively slow
+
+Workspaces
+  - get current quota: `$ ws_quota`
+  - group quota:  3 TB, 100k files
+  - user quota: none
+  - parallel file system Lustre; metadata slow, parallel access is fast
+  - hitting quota limit, disables queues for whole group
+
+`\localscratch\$UID`
+  - total size: `df -h /localscratch` -> 22 TB
+  - temporary scratch space
+  - deleted at logout
+  - local SSD; fast
+  - available only on login nodes
+
+---
+
+## What to put where?
+
+Persistent data on $HOME. E.g: 
+  - source code
+  - installed programs
+
+Temporary data/builds on `/localscratch/$UID`. E.g:
+  - anything temporary which does not fit on $HOME
+  - 
+
+Data for parallel jobs on workspace. E.g.
+  - Input and outputs of jobs
+  - anything which is access through MPI-IO or similar
+
+---
+
+## Typical workflows
+
+---
+
+### Large software project with autotools, e.g. OpenMPI
+
+```bash
+SRCFS=$HOME; BUILDFS=/localscratch/$UID; INSTALLFS=$HOME/opt
+
+git clone --depth=1 git@github.com:open-mpi/ompi.git $SRCFS/ompi.git
+cd $SRCFS/ompi.git; autoreconf -fiv
+
+mkdir -p $INSTALLFS/ompi_test_347; mkdir -p $BUILDFS/build_ompi
+
+cd $BUILDFS/build_ompi
+$SRCFS/ompi.git/configure --prefix $INSTALLFS/ompi_test_347
+make && make install
+```
+
+---
+
+### Large software project with CMake, e.g. targetDART
+
+```bash
+SRCFS=$HOME; BUILDFS=/localscratch/$UID; INSTALLFS=$HOME/opt
+
+git clone --depth=1 git@github.com:targetDART/llvm-project.git $SRCFS/TD.git
+
+mkdir -p $INSTALLFS/TD_buggy_again; mkdir -p $BUILDFS/build_TD
+
+cd $BUILDFS/build_TD
+cmake $SRCFS/TD.git/llvm Ninja -DCMAKE_INSTALL_PREFIX=$INSTALLFS/TD_buggy_again
+make && make install
+```
+
+---
+
+### Avoiding large git checkouts
+
+Do you really need all history? Do shallow clones.
+```bash
+git clone --depth=1 ...
+```
+
+---
+
+### Mirror git repo to $BUILDFS
+
+Assuming you have a (possibly large) git repo `my_repo.git` on `$HOME`. 
+Copy/clone source to `$BUILDFS` for faster access.
+```bash
+SRCFS=$HOME; BUILDFS=/localscratch/$UID; INSTALLFS=$HOME/opt
+
+ls $SRCFS/my_repo.git
+git clone --depth=1 file://$SRCFS/my_repo.git $BUILDFS/mirror_repo.git
+mkdir $BUILDFS/build
+
+cd $BUILDFS/build
+cmake $BUILDFS/mirror_repo.git/ -DCMAKE_INSTALL_PREFIX=$INSTALLFS/whatever
+$BUILDFS/mirror_repo.git/configure --prefix $INSTALLFS/whatever
+
+```
+
+---
+
+### Cleanup after parallel job
+
+Rsynch results of parallel job into `$HOME`. 
+```cat job.pbs
+PERMANENTFS=$HOME/results/
+
+cd $(ws_allocate my_job 1)
+mpirun ./app --resultsdir=results
+rsynch -a results $PERMANENTFS/
+rm -rf results
+```
+
+---