oracle datawarehouse on flash

http://hothardware.com/News/Fusionio-Doubles-ioDrive-Octal-Capacity-to-10TB/

The steps are simple

• buy a dl 580 g7 ( with 4 socket cpu ) and 512GB of RAM
• buy 2 fusion io drive octal 10TB ( for a total of 20TB flash ) ... aprox 200 000$
• install those 2 cards on the fastest PCIe slots and format them with 4K block size
• create a single ASM disk group ( with external redundancy ) from those 2 octal cards
• put the redo logs on your SAN ( or your direct attached storage )
• create a RAMFS filesystem inside your RAM ( remember, you have 0.5TB ) ... you will create your temporary tablespace inside your ramfs ( the only problem will be when you will restart the server... but not a single problem .... you will recreate the filesystem and the temporary tablespace ) . 
• the gain from putting temp inside your ram.... is huge ( tested by myself )
• the idea is to write your temporary data ( redo log is also a temporary data ) on your volatile medium ( ram  for temp ) or disk ( redo logs ) 
• your octal drives will only be occupied by useful data 
• the access is very very very fast ( bye-bye Exadata )
• no switches, no complex operations. 
• flash is sitting right next to the cpu
• 20TB of data should be enough for almost all of the datawarehouses
• the main problem is that you don't have raid .. but we suppose that the flash  fail less then classical disks