On Wed, 23 Jan 2013 14:26:43 -0600, Chris Rees <utis...@gmail.com> wrote:
> > So we have to take your word for it? > Provide a link if you're going to make assertions, or they're no more > than > your own opinion. I've heard this same thing -- every vdev == 1 drive in performance. I've never seen any proof/papers on it though. first google answer from request "raids performance" https://blogs.oracle.com/roch/entry/when_to_and_not_to Effectively, as a first approximation, an N-disk RAID-Z group will behave as a single device in terms of delivered random input IOPS. Thus a 10-disk group of devices each capable of 200-IOPS, will globally act as a 200-IOPS capable RAID-Z group. This is the price to pay to achieve proper data protection without the 2X block overhead associated with mirroring. -- Michel Talon ta...@lpthe.jussieu.fr
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