#!/bin/bash
#
# Prepare a file system for a benchmark run by creating any needed files or
# directories.


# Defaults
SERVER=vrable2.sysnet.ucsd.edu
MNTDIR=/mnt/bluesky

BENCH_FILESIZE=$((1 << 12))
BENCH_FILECOUNT=$((8))
BENCH_WRITERATIO=1.0
BENCH_THREADS=8
BENCH_DURATION=120
BENCH_OPS=100
BENCH_INTERVALS=4
BENCH_DIRSIZE=256

# Export any environment variables specified on the command line
for e in "$@"; do
    echo "$e" 1>&2
    if echo "$e" | grep = >/dev/null; then
        eval "$e"
        export ${e%=*}
    fi
done

# Prepare to run the benchmark
mount -t nfs -o vers=3,tcp,rw,soft,intr $SERVER:/export $MNTDIR

pushd $MNTDIR >/dev/null

mkdir $(seq 0 $(($BENCH_FILECOUNT / $BENCH_DIRSIZE)))
for i in $(seq 0 $(($BENCH_FILECOUNT - 1))); do
    n1=$(($i / $BENCH_DIRSIZE))
    n2=$(($i % $BENCH_DIRSIZE))
    dd if=/dev/zero of=$n1/$n2 bs=$BENCH_FILESIZE count=1
done

find -type f -exec sha1sum '{}' \;

popd >/dev/null

umount -f $MNTDIR