> Lucky you, having needs that are fulfilled by sequential reads.  :)

> I wonder how many hard drives it would take to be CPU bound on random
> access patterns?  About 40 to 60?  And probably 15k / SAS drives to
> boot.  Cause that's what we're looking at in the next few years where
> I work.

About $3000 worth of Intel --- mainstream SSD's = 240GB space (6 in raid 10) 
today, 2x to 3x that storage area in 1 year.

Random reads are even easier, provided you don't need more than 500GB or so.

And with something like ZFS + L2ARC you can back your data with large slow iops 
disks and have cache access to data without requiring mirrors on the cache ($3k 
of ssds for that covers 2x the area, then).

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