>>> On Wed, Jan 16, 2008 at 11:40 AM, in message <[EMAIL PROTECTED]>, Greg Smith <[EMAIL PROTECTED]> wrote: > On Wed, 16 Jan 2008, Alvaro Herrera wrote: > >> Keep in mind that there are claims that a write-cache-enabled >> battery-backed RAID controller negates the effect of a separate spindle. > > "Negates" is a bit strong; there's still some performance advantage on > systems that write a serious amount of data. It's certainly true that a > BCC controller greatly reduces the need for a separate spindle. I haven't seen any benchmarks on the list or in our environment where the separate spindles gave more than a 1% increase in performance when using a good-quality BBC controller. Do you have results that show more of a difference? Can you share them? -Kevin
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