转载 DNS负载均衡技术收藏

最新推荐文章于 2025-09-05 15:04:40 发布

转载最新推荐文章于 2025-09-05 15:04:40 发布 · 60 阅读

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#运维 #python

本文测试了在不同IP上解析www.sina.com.cn域名的DNS解析时间和结果，通过大量重复请求来评估DNS性能。

reference:
http://blog.youkuaiyun.com/flynetcn/archive/2009/01/08/3733574.aspx

cost time:24s
('202.108.33.94', 0) 625
('202.108.33.77', 0) 625
('202.108.33.70', 0) 625
('202.108.33.95', 0) 625
('202.108.33.74', 0) 625
('202.108.33.78', 0) 625
('202.108.33.71', 0) 625
('202.108.33.96', 0) 625
('202.108.33.75', 0) 625
('202.108.33.98', 0) 625
('202.108.33.79', 0) 625
('202.108.33.76', 0) 625
('202.108.33.72', 0) 625
('202.108.33.97', 0) 625
('202.108.33.99', 0) 625
('202.108.33.73', 0) 625

#!usr/bin/env python
#encoding=utf8
"""
test dns parser cost time
"""

import sys,socket
from datetime import datetime
s=datetime.now()
#result=socket.getaddrinfo("www.sina.com.cn",None)
dict={}
for i in xrange(0,10000):
    result=socket.getaddrinfo("www.sina.com.cn",None)
    result=result[0][4]
    if result not in dict:
        dict[result]=1
    else:
        dict[result]=dict[result]+1
    #this is error
    #result=socket.getaddrinfo("http://www.china-pub.com/1902284",None)

#resut=socket.gethostbyname("www.sina.com.cn")
e=datetime.now()
print "cost time:%ss"%(e-s).seconds
#print result[0][4]

#print "haah"
for k,v in dict.iteritems():
    print k,v