Ramping load generator from Sys Perf book

load_gen.py

#!/usr/bin/env python

import sys
import os
import random

IOSIZE = 8192
QUANTA = IOSIZE


def main():
    filename = sys.argv[1]
    print(filename)
    FILE = os.open(filename, os.O_RDWR)
    while True:
        os.lseek(FILE, int(random.random() * IOSIZE), 0)
        os.read(FILE, IOSIZE)


if __name__ == "__main__":
    main()