On Mon, Aug 8, 2016 at 6:06 PM, Ted Mielczarek <t...@mielczarek.org> wrote:

> On Mon, Aug 8, 2016, at 05:38 PM, Gregory Szorc wrote:
>
> * We're using EBS instead of local instance storage
>
>
> Did this turn out to be faster? In all the benchmarks I had previously
> read EBS was way slower than instance SSD.
>

EBS has gotten much better in the past several years. The SSD based EBS
volumes (which we're using) have pretty decent burst performance
(>100MB/s). I'd also like to think most of our I/O should be serviced by
the page cache. I've noticed this in local builds - as long as my OS has
16+ GB memory, I/O isn't a huge concern there is external memory pressure
or background dirty page flushing can't keep up with demand. I don't think
I/O differences due to EBS will matter too much on these instances. aufs
overhead, however... (Read bug 1291940).
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