gistfile1.py

import time
import multiprocessing
import memcache
 
key = 'foo'
process = 100
count = 1000
 
def f():
    mc = memcache.Client(['127.0.0.1:11212'])
    for i in range(count):
        mc.incr(key)
 
while 1:
    mc = memcache.Client(['127.0.0.1:11212'])
    mc.set(key, 1)
    assert mc.get(key) == 1
    l = []
    for i in range(process):
        p = multiprocessing.Process(target=f)
        p.start()
        l.append(p)
    for p in l:
        p.join()
    time.sleep(1)
    print mc.get(key)
    assert mc.get(key) == process * count + 1
    time.sleep(10)
 
# ubuntu 9.04
# memcached Version: 1.2.2-1+lenny1build0.9.04.1
# libevent1 Version: 1.3e-3
# 100回試行して再現せず