Far too often, people have the expectation that using expensive hardware is the only way to obtain optimal performance from their data warehouse. They'll spend a lot of money to throw both hardware and software at their performance problems, including items such as:
Multi-CPU servers (symmetric multi-processing [SMP] or massively parallel processing [MPP])
RAID disk arrays (storage area network [SAN] or network-attached storage [NAS])
More disk array memory cache
Faster disk drives (e.g., 15,000 RPM)
More disks (i.e., switch RAID-5 to RAID-1+0)
 There are two common kinds of operating file systems: cooked and raw. With cooked file systems, the ...