本文实例讲述了Python实现测试磁盘性能的方法。分享给大家供大家参考。具体如下：

该代码做了如下工作：

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代码如下：

复制代码 代码如下:#!/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)

希望本文所述对大家的Python程序设计有所帮助。