Are we talking about DB or OS or DBOS? I am confused.
Well, just think crazily, but what happen when the HDD has no OS? Like remote storage that is shared with many servers? Remote storage is going thru fiber optic with high bandwidth obviously. What I see is the Live Mesh case. Cache on your computer and you
don't know what's going on to the actual remote storage, let along the other sync device. And I am using Live Mesh, it is hardly good because synchronization is hard between devices.
And whats the point to store the FS when you still need to access the DB and get some data from a page or many pages? And if HDD is not spining, how do you know your FS on RAM is synced? And what about RAM for actual data caculations, they are RAM intensive
on numerous occasions? If RAM runs out, you are going to drop FS on RAM? Just doesn't make any sense to me.
Anyway, FS on RAM? It sounds really really unsafe to begin with.