test.sh

test_io_write() {
    echo "running $FUNCNAME, write 1g file, iterations: $ITERATIONS"
    local TIME_SUM=0
    local SPEED_SUM=0
    for i in $(seq 1 $ITERATIONS); do
        rm -rf $VOLUME/largefile_write
        result=$(dd if=/dev/zero of=$VOLUME/largefile_write bs=1M count=1000 2>&1)
        echo "1 $result"
        local TIME=$(echo $result | cut -d ' ' -f 12)
        echo "2 $TIME" 
        local SPEED=$(echo $result | cut -d ' ' -f 14)
        echo "3 $SPEED"
        local TIME_SUM=$(echo $TIME_SUM + $TIME | bc)
        echo "4 $TIME_SUM"
        local SPEED_SUM=$(echo $SPEED_SUM + $SPEED | bc)
        echo "4 $SPEED_SUM"
        rm -rf $VOLUME/largefile_write
    done
    echo "AVG write speed (1G file):"
    echo "$(echo "scale=2; $SPEED_SUM/$ITERATIONS" | bc) $(echo $result | cut -d ' ' -f 15) / in $(echo "scale=2; $TIME_SUM/$ITERATIONS" | bc) sec"
    echo "=============================================================="
}
test_io_write