On Mon, Oct 31, 2011 at 7:38 AM, Page, Jeremy
<jeremy.page@gilbarco.com> wrote:
I think it’s quite reasonable to only allocate resources when needed. IT shops don’t always have perfect control over their purchasing budget’s granularity, most of us are asked to forecast at least a year in advance what our requirements will be.
That being said it’s a good idea to set up your RG’s and aggrs in a way that makes it easy to cleanly adding capacity. Having one 4 disk RG and two others with 16 spindles is probably not a good idea.
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Aggregates do not provide capacity.
Volumes do.
You MAY have business drivers to have separate pools of spindle,
but..spindles not together, arent parallelizing with each other with a
common workload.
But there is no reason one 4+2 and two 16+2s cant perform quite well. There is no unreasonable penalty to doing so if that's how it happened to grow over time if the right tools are used to manage it.