gistfile1.txt

[root@21-129-18-537886 ~]# cat write-test.py
#/usr/bin/env python
 
import os
import sys
import time
 
blksz = 1024 * 1024
iters = 64
 
filename = sys.argv[1]
 
if os.path.exists(filename):
    print '%s exists' % filename
    sys.exit(0)
 
blk = 'a' * blksz
 
f = open(filename, 'w')
 
for x in range(iters):
    start = time.time()
    f.write(blk)
    f.flush()
    end = time.time()
    if (end - start) < 1:
        print '.',
    else:
        print "\n%s" % (end - start)
f.close()
print
os.unlink(filename)