这些模块的优缺点比较存在
http://blog.jboss.org/
mod_proxy
* Pros: o No need for a separate module compilation and maintenance. mod_proxy, mod_proxy_http, mod_proxy_ajp and mod_proxy_balancer comes as part of standard Apache 2.2+ distribution o Ability to use http https or AJP protocols, even within the same balancer.* Cons: o mod_proxy_ajp does not support large 8K+ packet sizes. o Basic load balancer o Does not support Domain model clustering
mod_jk
* Pros: o Advanced load balancer o Advanced node failure detection o Support for large AJP packet sizes* Cons: o Need to build and maintain a separate module
