On Thu, Mar 11, 2010 at 10:45 AM, Jonathan Ellis <jbel...@gmail.com> wrote: > Except that for a major compaction the whole thing gets put in one > directory. That's the problem w/ the JBOD approach.
Even without major compaction, you can get significant imbalances in how much data is on each disk which will bottleneck your IO throughput. We're running JBOD right now, but going to switch to RAID 0 soon. -ryan