---
# System prepended metadata

title: CAM-CHEM

---

# CAM-CHEM

## Links

- [Musica Tutorial](https://github.com/dan800/musica_tutorial)
- **If you need help** message Alex Coleman <medacola@leeds.ac.uk> on Teams


## Using queue reservation

For this tutorial a queue reservation has been made specifically for the training accounts provided. This should provide reserved compute (16 nodes) for running jobs during the tutorial.

### Usage

To use the reserved compute you will need to provide additional arguments to your job submission file. You are also unable to use the `-l nodes=4` argument to request nodes but you can use `-pe ib 160` for the equivalent effect.

#### Example job script

```
# specify reservation ID
#$ -ar 22
# specify feps-cpu project
#$ -P feps-cpu
# request 4 nodes
#$ -pe ib 160
#  request memory for each core
#$ -l h_vmem=4.8G
# specify some time (defaulted to 1h here)
#$ -l h_rt=1:00:00

# run some code

./hello_world
```


The key arguments here are:

- `#$ -ar 22` - this requests you use the advanced reservation ID 22
- `#$ -P feps-cpu` - this requests using the specific `feps-cpu` queue where the reservation has been made
- `#$ -pe ib 160` - this requests using 4 nodes (160 cores over infiniband)

### Extra links

- [Leeds HPC documentation](https://arcdocs.leeds.ac.uk/welcome.html)