Apache+负载均衡+gzip(自带的)

流水帐：

<IfModule mod_deflate.c>
SetOutputFilter DEFLATE
SetInputFilter DEFLATE

#the two above compress everything unless excluded below
SetEnvIfNoCase Request_URI \.(?:exe|t?gz|zip|bz2|sit|rar)$ no-gzip dont-vary
SetEnvIfNoCase Request_URI \.pdf$ no-gzip dont-vary             
SetEnvIfNoCase Request_URI \.avi$ no-gzip dont-vary            
SetEnvIfNoCase Request_URI \.mov$ no-gzip dont-vary
SetEnvIfNoCase Request_URI \.mp3$ no-gzip dont-vary
SetEnvIfNoCase Request_URI \.mp4$ no-gzip dont-vary    
SetEnvIfNoCase Request_URI \.rm$ no-gzip dont-vary     
SetEnvIfNoCase Request_URI \.plist$ no-gzip dont-vary  

# Below is an example where you get rid of what's above and you explicity compress
AddOutputFilterByType DEFLATE application/x-httpd-php application/x-httpd-fastphp application/x-javascript application/x-httpd-eruby text/js text/html image/jpg image/jpeg image/gif image/png text/css
DeflateFilterNote ratio
DeflateCompressionLevel 9
LogFormat '"%r" %b (%{ratio}n) "%{User-agent}i"' deflate
CustomLog logs/deflate_log deflate
</IfModule>


<Directory "XXX">
AllowOverride None
Options None
Order allow,deny
Allow from all
</Directory>

<VirtualHost *:80>
ServerAdmin [e-mail]
ServerName localhost
ServerAlias clm
ProxyPass /images/ !
ProxyPass /stylesheets/ !
ProxyPass /javascripts/ !
Alias /stylesheets/ "XXX/stylesheets/"
Alias /images/ "XXX/images/"
Alias /javascripts/ "XXX/javascripts/"
ProxyPass / balancer://clm_balancer/
ProxyPassReverse / balancer://XXX_balancer/
ErrorLog logs/clm-error.log
CustomLog logs/clm-access.log common
</VirtualHost>

<Proxy balancer://XXX_balancer>
BalancerMember http://localhost:3000
BalancerMember http://localhost:3001
BalancerMember http://localhost:3002
BalancerMember http://localhost:3003
BalancerMember http://localhost:3004
BalancerMember http://localhost:3005
</Proxy>

对于js，css文本文件压缩还可以，image压缩没有我想象的那么惊讶，效果不是很好。

参考：
http://httpd.apache.org/docs/2.0/mod/mod_deflate.html#recommended
http://schroepl.net/projekte/mod_gzip/config.htm
【原生gzip，但好像apache2.x支持不好，遂选择apache自带的mod_deflate】

补充，在做apache要所之前，已经用jsbuilder压缩过js，效果不错，以前就用过，随手拈来，效率还可以，只是在折腾gzip的时候耗费些时间。