1. Boost application performance using asynchronous I/O
Ref: http://www.ibm.com/developerworks/linux/library/l-async/
2. Asynchronous I/O on linux
Ref: http://davmac.org/davpage/linux/async-io.html#posixaio
3. Design Notes on Asynchronous I/O (aio) for Linux
Ref: http://lse.sourceforge.net/io/aionotes.txt
4. threadpool
Ref: http://threadpool.sourceforge.net/
5. Thread Pools Using Solaris 8 Asynchronous I/O
Ref: http://developers.sun.com/solaris/articles/thread_pools.html