基于Apachemod_proxy的反向代理缓存加速实现
Apache包含了mod_proxy模块，可以用来实现代理服务器，针对后台服务器的反向加速
安装apache1.3.x编译时：
--enable-shared=max--enable-module=most
注：Apache2.x中mod_proxy已经被分离成mod_proxy和mod_cache：同时mod_cache有基于文件和基于内存的不同实现
创建/var/www/proxy，设置apache服务所用户可写
mod_proxy配置样例：反相代理缓存＋缓存
架设前台的www.example.com反向代理后台的www.backend.com的8080端口服务。
修改：httpd.conf
<VirtualHost*>
ServerNamewww.example.com
[email protected]
#reverseproxysetting
ProxyPass/http://www.backend.com:8080/
ProxyPassReverse/http://www.backend.com:8080/
#cachedirroot
CacheRoot"/var/www/proxy"
#maxcachestorage
CacheSize50000000
#hour:every4hour
CacheGcInterval4
#maxpageexpiretime:hour
CacheMaxExpire240
#Expiretime=(now-last_modified)*CacheLastModifiedFactor
CacheLastModifiedFactor0.1
#defaltexpiretag:hour
CacheDefaultExpire1
#forcecompleteafterprecentofcontentretrived:60-90%
CacheForceCompletion80
CustomLog/usr/local/apache/logs/dev_access_logcombined
</VirtualHost>

基于Squid的反向代理加速实现
Squid是一个更专用的代理服务器，性能和效率会比Apache的mod_proxy高很多。
如果需要combined格式日志补丁：
http://www.squid-cache.org/mail-archive/squid-dev/200301/0164.html
squid的编译：
./configure--enable-useragent-log　--enable-referer-log--enable-default-err-language=Simplify_Chinese--enable-err-languages="Simplify_ChineseEnglish"--disable-internal-dns　
make
#makeinstall
#cd/usr/local/squid
makedircache
chownsquid.squid*
vi/usr/local/squid/etc/squid.conf
在/etc/hosts中：加入内部的DNS解析，比如：
192.168.0.4[url]www.chedong.com[/url]
192.168.0.4news.chedong.com
192.168.0.3bbs.chedong.com
---------------------cuthere----------------------------------
#visiblename
visible_hostnamecache.example.com
#cacheconfig:spaceuse1Gandmemoryuse256M
cache_dirufs/usr/local/squid/cache102416256
cache_mem256MB
cache_effective_usersquid
cache_effective_groupsquid

http_port80
httpd_accel_hostvirtual
httpd_accel_single_hostoff
httpd_accel_port80
httpd_accel_uses_host_headeron
httpd_accel_with_proxyon
#acceleratermydomainonly
aclacceleratedHostAdstdomain.example1.com
aclacceleratedHostBdstdomain.example2.com
aclacceleratedHostCdstdomain.example3.com
#acceleraterhttpprotocolonport80
aclacceleratedProtocolprotocolHTTP
aclacceleratedPortport80
#accessarc
aclallsrc0.0.0.0/0.0.0.0
#AllowrequestswhentheyaretotheacceleratedmachineANDtothe
#rightportwithrightprotocol
http_accessallowacceleratedProtocolacceleratedPortacceleratedHostA
http_accessallowacceleratedProtocolacceleratedPortacceleratedHostB
http_accessallowacceleratedProtocolacceleratedPortacceleratedHostC
#logging
emulate_httpd_logon
cache_store_lognone
#manager
aclmanagerprotocache_object
http_accessallowmanagerall
cachemgr_passwdpassall

----------------------cuthere---------------------------------
创建缓存目录：
/usr/local/squid/sbin/squid-z
启动squid
/usr/local/squid/sbin/squid
停止squid：
/usr/local/squid/sbin/squid-kshutdown
启用新配置：
/usr/local/squid/sbin/squid-kreconfig
通过crontab每天0点截断/轮循日志：
00***(/usr/local/squid/sbin/squid-krotate)

附：SQUID性能测试试验
phpMan.php是一个基于php的manpageserver，每个man
page需要调用后台的man命令和很多页面格式化工具，系统负载比较高，提供了Cache
Friendly的URL，以下是针对同样的页面的性能测试资料：
测试环境：Redhat8onCyrix266/192MMem
测试程序：使用apache的ab(apachebenchmark)：
测试条件：请求50次，并发50个连接
测试项目：直接通过apache1.3(80端口)vssquid2.5(8000端口：加速80端口)

测试1：无CACHE的80端口动态输出：
ab-n100-c10[url]http://www.chedong.com:81/phpMan.php/man/kill/1[/url]
ThisisApacheBench,Version1.3d<$Revision:1.2$>apache-1.3
Copyright(c)1996AdamTwiss,ZeusTechnologyLtd,
[url]http://www.zeustech.net/[/url]
Copyright(c)1998-2001TheApacheGroup,[url]http://www.apache.org/[/url]

Benchmarkinglocalhost(bepatient).....done
ServerSoftware:　
Apache/1.3.23
ServerHostname:localhost
Server
Port:　
80

DocumentPath:
/phpMan.php/man/kill/1
DocumentLength:4655bytes

ConcurrencyLevel:　5
Timetakenfortests:　63.164seconds
Completerequests:　50
Failedrequests:0
Brokenpipeerrors:0
Totaltransferred:　245900bytes
HTMLtransferred:　232750bytes
Requestspersecond:0.79[#/sec](mean)
Timeperrequest:　6316.40[ms]
(mean)
Timeperrequest:　1263.28[ms]
(mean,acrossallconcurrentrequests)
Transferrate:
3.89[Kbytes/sec]received

ConnnectionTimes(ms)

min　mean[+/-sd]median　max
Connect:0　
29　106.1　0　553
Processing:　2942　6016
1845.4　622710796

Waiting:
2941　59991850.7　622610795

Total:　
2942　60451825.9　622710796

Percentageoftherequestsservedwithinacertaintime(ms)
　50%　6227
　66%　7069
　75%　7190
　80%　7474
　90%　8195
　95%　8898
　98%　9721
　99%　10796
100%　10796(lastrequest)

测试2：SQUID缓存输出
/home/apache/bin/ab-n50-c5
"http://localhost:8000/phpMan.php/man/kill/1"
ThisisApacheBench,Version1.3d<$Revision:1.2$>apache-1.3
Copyright(c)1996AdamTwiss,ZeusTechnologyLtd,
[url]http://www.zeustech.net/[/url]
Copyright(c)1998-2001TheApacheGroup,[url]http://www.apache.org/[/url]

Benchmarkinglocalhost(bepatient).....done
ServerSoftware:　
Apache/1.3.23
ServerHostname:localhost
Server
Port:　
8000

DocumentPath:
/phpMan.php/man/kill/1
DocumentLength:4655bytes

ConcurrencyLevel:　5
Timetakenfortests:　4.265seconds
Completerequests:　50
Failedrequests:0
Brokenpipeerrors:0
Totaltransferred:　248043bytes
HTMLtransferred:　232750bytes
Requestspersecond:11.72[#/sec](mean)
Timeperrequest:　426.50[ms](mean)
Timeperrequest:　85.30[ms](mean,
acrossallconcurrentrequests)
Transferrate:
58.16[Kbytes/sec]received

ConnnectionTimes(ms)

min　mean[+/-sd]median　max
Connect:　
01　
9.5　068
Processing:
783　537.4
7　3808

Waiting:　
581　529.1
6　3748

Total:
784　547.0
7　3876

Perce

评论 (0) All

登陆 还没注册？