见识了F5负载均衡交换机[原创]

在北京中关村附近找个窝[原创]

可以上传、下载文件的SSH客户端软件--SecureCRT绿色版

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2007-3-15 17:56 | by 张宴 ]

　　今天有机会去了趟中国网通北京西单机房，也终于见识了价值50～100万人民币的“F5 BIG-IP 负载均衡交换机”，以下是我对F5 BIG-IP的一些认识：
　　
　　1、F5 BIG-IP是一台对流量和内容进行管理分配的设备，它提供12种灵活的算法将所有流量均衡的分配到各个服务器，而面对用户，只是一台虚拟服务器。

　　2、F5 BIG-IP可以确认应用程序能否对请求返回对应的数据。假如F5 BIG-IP后面的某一台服务器发生服务停止、死机等故障，F5会检查出来并将该服务器标识为宕机，从而不将用户的访问请求传送到该台发生故障的服务器上。这样，只要其它的服务器正常，用户的访问就不会受到影响。宕机一旦修复，F5 BIG-IP就会自动查证应用已能对客户请求作出正确响应并恢复向该服务器传送。
　　
　　3、F5 BIG-IP通过OneConnection连接优化技术，卸载服务器端的处理压力，提升服务器处理性能。
　　
　　4、F5 BIG-IP通过流量整形和Qos机制区分和保证重要应用的带宽和服务等级。
　　
　　F5性能不错，但价格也不低，低成本实现网站负载均衡的方法之一是：DNS轮循。相比于F5 BIG-IP负载均衡交换机，DNS轮循的处理性能要低，而且负载并不很均衡。如果有服务器倒掉，DNS不能马上将该服务器从列表中摘除。搜狐目前使用的是DNS轮循技术，“nslookup www.sohu.com”可以发现有以下IP：61.135.179.130, 61.135.179.132, 61.135.179.147, 61.135.179.148, 61.135.179.152, 61.135.179.153, 61.135.179.170, 61.135.179.171, 61.135.179.172, 61.135.179.173, 61.135.179.174, 61.135.179.175, 61.135.179.176, 61.135.150.63, 61.135.150.114。随便访问其中的一个IP地址可知，这些服务器都是squid/2.5.STABLE14软件实现的反向代理服务器。

　　最新文章：《F5 BIG-IP负载均衡器配置实例与Web管理界面体验[原创] 》

电脑杂谈 | 评论(34) | 引用(0) | 阅读(52176)

2007-6-20 09:44

没有这么贵,一般也就20WRMB左右,前几天刚拆了一台F5看,里面硬件非常简单,就是pC+swicth估计成本就几K,所以还是很暴利的,还有用DNS轮循做负载还是很均衡的,主要缺陷还是没有健康检查.目前低成本实现还是用Alteon比较多点,价格比F5便宜很多

123

2008-1-7 14:37

拆的啥型号啊,怎么可能还是pc+swicth啊,另外人家见的是高端型号,50-100万很正常.

^_^

2008-2-3 20:44

20w的型号应该很多吧，

2008

2008-3-4 15:32

转让 F5 BIG-IP负载均衡交换机，型号2400
有需要请与我联系：13522386606
联系人：宋先生

huicong7788

2008-9-1 18:58

哈哈刚熟悉F5这东东。就是感觉这东西很贵。

2008-9-11 18:09

这么快就转让了？这么牛的东西。。。

haha

2008-10-29 17:40

f5 接入方式都有什么啊,我现在正在配置,出问题了

旭辉信

2010-4-9 21:54

提供物美价廉的旭辉信负载均衡器，有需要的请发mail到xuhuixinadmin@126.com，谢谢！

fentianling

2011-5-3 17:07

肯花钱，东西必然好，在互联网行业里面，就看投资多少~

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