# latency:     /dev/nbd1     10809
# throughput: /dev/nbd2  10810

set -e

USER=$(whoami)

sudo echo got a password

fallocate -l 64g latency.img
fallocate -l 64g throughput.img

# in case of old files... clear up
wipefs -a ./latency.img
wipefs -a ./throughput.img

rm -v latency.txt throughput.txt || echo cannot delete stats
nbdkit          --filter=exitlast --filter=stats file latency.img statsfile=latency.txt
nbdkit -p 10810 --filter=exitlast --filter=stats file throughput.img statsfile=throughput.txt

sudo nbd-client localhost /dev/nbd1
sudo nbd-client localhost 10810 /dev/nbd2

sudo zpool create latency /dev/nbd1
sudo zpool create throughput /dev/nbd2

sudo zfs set logbias=throughput throughput

sudo chown ${USER}:${USER} /latency
sudo chown ${USER}:${USER} /throughput

OLD=$(pwd)

cd /throughput
fio --rw=randrw --fsync=1 --sync_file_range=write --name=throughput --size=256m --output=${OLD}/throughput.fio

cd /latency
fio --rw=randrw --fsync=1 --sync_file_range=write --name=latency    --size=256m --output=${OLD}/latency.fio

cd ${OLD}

sudo zpool export latency
sudo zpool export throughput

sudo nbd-client -d /dev/nbd1
sudo nbd-client -d /dev/nbd2