storage-benchmark.sbatch

#!/bin/bash
#SBATCH -J arrh-storage-benchmark

usage() {
    echo "Usage: sbatch -N <number of nodes> --cpus-per-task=<threads per node> storage-benchmark.sbatch [ sequential <blocksize> | iops | meta ] <bytes or files per thread> <directory>"
    exit 2
}

info() {
    echo "storage-benchmark.sbatch:" "$@"
}

##
## Argument handling
##

MODE=$1
if [ "$MODE" = sequential ]
then
    BLOCKSIZE=$2
    shift
elif [ "$MODE" = iops ] || [ "$MODE" = meta ]
then :
else usage
fi

BYTES_OR_FILES=$2
if [ -z "$BYTES_OR_FILES" ]
then usage
fi

DIRECTORY=$3
if [ -z "$DIRECTORY" ]
then usage
fi

mkdir -p $DIRECTORY

NNODES=$SLURM_NNODES
THREADS=$SLURM_CPUS_PER_TASK
HOSTS=$(scontrol show hostnames | tr '\n' ',')

info "Mode: $MODE"
if [ "$BLOCKSIZE" ]
then info "Blocksize: $BLOCKSIZE"
fi
info "Number of nodes: $NNODES"
info "Threads per node: $THREADS"
elbencho --version

##
## The benchmark
##

info "Starting service on all nodes"
srun --ntasks-per-node=1 elbencho --service --foreground > /dev/null &
sleep 10  # wait for services to start

info "Starting storage benchmark"
echo

if [ "$MODE" = sequential ]
then

    elbencho --hosts "$HOSTS" --rotatehosts=1 -t "$THREADS" \
	-w -r -b "$BLOCKSIZE" -s "$BYTES_OR_FILES" -n 0 -F "$DIRECTORY"

elif [ "$MODE" = iops ]
then

    elbencho --hosts "$HOSTS" --rotatehosts=1 -t "$THREADS" \
	-w -r -b 4K -s "$BYTES_OR_FILES" -n 0 -F --rand "$DIRECTORY"

elif [ "$MODE" = meta ]
then

    elbencho --hosts "$HOSTS" --rotatehosts=1 -t "$THREADS" \
	-d -w --stat -F -N "$BYTES_OR_FILES" -D "$DIRECTORY"

fi

echo
info "Benchmark done"

elbencho --hosts "$HOSTS" --quit

wait