DSAI Quick Start

What you need

Item

Notes

JHED and DSAI account

Request one on Coldfront

Hopkins VPN (Pulse Secure)

Required from off-campus for some services

SSH client

macOS/Linux: built-in • Windows: OpenSSH or PuTTY

Log in

ssh <YourUserID>@dsailogin.arch.jhu.edu

First time? Type yes at the host-key prompt, then your DSAI password.

Submit your first batch job

Create hello.slurm :

#!/bin/bash
#SBATCH --job-name=hello
#SBATCH --output=hello.%j.out
#SBATCH --time=00:02:00
#SBATCH --ntasks=1
#SBATCH --cpus-per-task=1
#SBATCH --partition=$Partition

echo "Hello from $(hostname)!"
sleep 30

Submit & monitor:

sbatch hello.slurm      # submit
squeue -u $USER         # check status
tail -f hello.<jobID>.out

If the job is PENDING for more than a minute, reduce resources or pick another partition (see table below).

Partitions at a glance

For available partitions, see: Available Partitions

Managing Python, Jupyter, RStudio

Work in Progress

Storage locations

Path

Default quota

Intended for

/home/$USER

50 GB (backed up)

configs, notebooks, small scripts

/scratch/$PI

1 TB

working data

For more information on available filesystems, see here: Filesystems on DSAI

House-keeping

  • Fair-share scheduler – large jobs may wait if your lab has used more CPU-hours than average recently.

  • Login nodes – no heavy compute. Use sbatch instead.

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