本文實(shí)例講述了Python實(shí)現(xiàn)測試磁盤性能的方法。分享給大家供大家參考。具體如下：
該代碼做了如下工作：
create 300000 files (512B to 1536B) with data from /dev/urandom
rewrite 30000 random files and change the size
read 30000 sequential files
read 30000 random files
delete all files
sync and drop cache after every step
bench.py代碼如下：
復(fù)制代碼代碼如下:
#!/usr/bin/python
# -*- coding: utf-8 -*-
filecount = 300000
filesize = 1024
import random, time
from os import system
flush = "sudo su -c 'sync ; echo 3 > /proc/sys/vm/drop_caches'"
randfile = open("/dev/urandom", "r")
print "\ncreate test folder:"
starttime = time.time()
system("rm -rf test && mkdir test")
print time.time() - starttime
system(flush)
print "\ncreate files:"
starttime = time.time()
for i in xrange(filecount):
rand = randfile.read(int(filesize * 0.5 + filesize * random.random()))
outfile = open("test/" + unicode(i), "w")
outfile.write(rand)
print time.time() - starttime
system(flush)
print "\nrewrite files:"
starttime = time.time()
for i in xrange(int(filecount / 10)):
rand = randfile.read(int(filesize * 0.5 + filesize * random.random()))
outfile = open("test/" + unicode(int(random.random() * filecount)), "w")
outfile.write(rand)
print time.time() - starttime
system(flush)
print "\nread linear:"
starttime = time.time()
for i in xrange(int(filecount / 10)):
infile = open("test/" + unicode(i), "r")
outfile.write(infile.read());
print time.time() - starttime
system(flush)
print "\nread random:"
starttime = time.time()
outfile = open("/dev/null", "w")
for i in xrange(int(filecount / 10)):
infile = open("test/" + unicode(int(random.random() * filecount)), "r")
outfile.write(infile.read());
print time.time() - starttime
system(flush)
print "\ndelete all files:"
starttime = time.time()
system("rm -rf test")
print time.time() - starttime
system(flush)
# -*- coding: utf-8 -*-
filecount = 300000
filesize = 1024
import random, time
from os import system
flush = "sudo su -c 'sync ; echo 3 > /proc/sys/vm/drop_caches'"
randfile = open("/dev/urandom", "r")
print "\ncreate test folder:"
starttime = time.time()
system("rm -rf test && mkdir test")
print time.time() - starttime
system(flush)
print "\ncreate files:"
starttime = time.time()
for i in xrange(filecount):
rand = randfile.read(int(filesize * 0.5 + filesize * random.random()))
outfile = open("test/" + unicode(i), "w")
outfile.write(rand)
print time.time() - starttime
system(flush)
print "\nrewrite files:"
starttime = time.time()
for i in xrange(int(filecount / 10)):
rand = randfile.read(int(filesize * 0.5 + filesize * random.random()))
outfile = open("test/" + unicode(int(random.random() * filecount)), "w")
outfile.write(rand)
print time.time() - starttime
system(flush)
print "\nread linear:"
starttime = time.time()
for i in xrange(int(filecount / 10)):
infile = open("test/" + unicode(i), "r")
outfile.write(infile.read());
print time.time() - starttime
system(flush)
print "\nread random:"
starttime = time.time()
outfile = open("/dev/null", "w")
for i in xrange(int(filecount / 10)):
infile = open("test/" + unicode(int(random.random() * filecount)), "r")
outfile.write(infile.read());
print time.time() - starttime
system(flush)
print "\ndelete all files:"
starttime = time.time()
system("rm -rf test")
print time.time() - starttime
system(flush)
希望本文所述對大家的Python程序設(shè)計(jì)有所幫助。
