Hardware solution will be great for you!

    Hello , as you know Oracle Exadata is fastest database supercomputer on earth.
But i think its not that hard to make such devices in these days.

    I've tought same for objectdb.You can make same thing with simple solutions.

1-)
http://en.wikipedia.org/wiki/Object-based_file_system

You need to make object based file system RAID on SSD distrubuted devices

2-)  and you need good futuristic cpu like this;

http://www.kickstarter.com/projects/adapteva/parallella-a-supercomputer-for-everyone

This cpu is fastest low power cpu on earth and you optimize it for objectdb.

It will be very great for objectdb.I'm sure many JPA compatible big companies will think about such device.

The key is ;

Low Power
Fastest response

You can look another video about parallela:

http://www.youtube.com/watch?v=taAG9QNWLNo

you should check for fpga database named:

kickfire

http://www.dbms2.com/2009/08/21/kickfires-fpga-based-technical-strategy/