I've looked into tools like DRDB (that can scale only up to 2 active-active nodes) and GlusterFS (that is great, but not for the small files that a web server usually serves).
I'm looking for a filesystem/cluster of storage servers:
- That is POSIX compilant (as many web apps require this)
- That works great with a 90% reads / 10% write workload of small files (think at index.php pages or small images)
- Is scalable, both in size and performance
- Access time is minimal
I have tough a lot on this and i think that there is nothing out there that could help me.