Lab: First Euler CPU Job | IDEAL IT Passport

Goal: submit, monitor, and account for a tiny CPU job without computing on a login node.

Prerequisites: the public-key login test passes, the Euler CPU Track is started, and my_share_info lists the intended account.

Execution context: all commands run on an Euler login node - Bash.

hostname
my_share_info
pwd

Expected result: the hostname begins with an Euler login-node name and es_fuge appears for IDEAL Lab users.

2. Create The Tiny Script#

mkdir -p "$HOME/passport-euler/logs"
cd "$HOME/passport-euler"
cat > first-job.slurm <<'EOF'
#!/usr/bin/env bash
#SBATCH --job-name=passport-cpu
#SBATCH --account=es_fuge
#SBATCH --time=00:02:00
#SBATCH --ntasks=1
#SBATCH --cpus-per-task=1
#SBATCH --mem-per-cpu=1G
#SBATCH --output=logs/%x_%j.out
#SBATCH --error=logs/%x_%j.err

set -euo pipefail
echo "job_id=$SLURM_JOB_ID"
echo "host=$(hostname)"
echo "cpus=$SLURM_CPUS_PER_TASK"
for number in 1 2 3 4 5; do
  printf '%s squared is %s\n' "$number" "$((number * number))"
done
EOF
bash -n first-job.slurm
sed -n '1,80p' first-job.slurm

This intentionally requests one CPU, 1 GiB per CPU, two minutes, and no GPU.

3. Submit And Monitor#

job_id="$(sbatch --parsable first-job.slurm)"
printf 'Submitted job: %s\n' "$job_id"
squeue -j "$job_id"

If you notice an error in the script or request:

scancel "$job_id"

4. Inspect Output And Accounting#

After the job leaves squeue:

cat "logs/passport-cpu_${job_id}.out"
cat "logs/passport-cpu_${job_id}.err"
sacct -j "$job_id" \
  --format=JobID,JobName%20,Account,State,ExitCode,Elapsed,AllocCPUS,ReqMem,MaxRSS
seff "$job_id"

The error file should be empty and the main job should complete. Accounting may include .batch and .extern steps; that is normal.

Verification#

The output hostname is a compute node, not the login node.
The main job state is COMPLETED with a successful exit code.
Exactly one CPU and no GPU were requested.
You can explain Elapsed, ReqMem, MaxRSS, and the seff summary.

Common Failures And Safe Recovery#

Invalid account: stop and confirm my_share_info; do not guess an account.
Job pending: inspect myjobs -j "$job_id"; do not submit duplicates.
Error log not empty: read the first meaningful error before changing resources.
Accounting temporarily blank: wait briefly and rerun sacct.

Understand Before Accepting AI Output#

I read the script before submitting it.
I recorded the real job ID.
I know how to cancel it.
I personally inspected output and accounting.

Evidence#

Record the script, job ID, state, exit code, elapsed time, requested memory, MaxRSS, and a two-sentence interpretation. Do not include usernames, tokens, private paths, or unrelated job history in a public location.

Ask For Help When#

The account is missing, the job cannot enter the queue, the state/exit code is unclear, or the login node was used accidentally for computation.

1. Confirm Context And Share#