Homemade SAN on Ubuntu?

[howard chen]

Hi

Are there recommended/popular solutions for Ubuntu which allow user to
build a SAN using homemade/opensource technologies?

My case:

I have 10+ web servers, which connnected to a centralized storage
server via NFS. The storage is busy as each request to the web servers
need to fetch HTML from the centralized server. The storage server
also host a lot of images files to be served.

Surely this is the bottomneck for my system. Also, scalablity is not
good as the storage capacity is limited by one server. So I want to
explore any opensource solutions which can solve my problem.

Any suggestions?

Thanks.