> On Jan 15, 2015, at 18:46, Julien Danjou <jul...@danjou.info> wrote:
> Yep, that's the main downside of the use of the Carbonara based backend
> in Gnocchi. But honestly, since it's download/upload are parallel and
> the file size is quite small, sending a metric should be pretty fast in
> most circumstances. Though that's sure it's gonna be faster with
> backends where you just have to send the actual metrics (OpenTSDB or
> InfluxDB likely).

As a further question, how do you estimate the storage impact of a vm 
instance’s metrics? I’m not very sure about the `back_window` and `definition` 
part, could you clarify that for me?

Can Zhang

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