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The charts are generated on-demand by Graphite, which is a Django app.

I will note that one reason I chose StatsD is because it sends the stats via UDP rather than TCP, which is a non-blocking operation. I didn't want the sending of stats to affect the node's performance.

- - Jameson

On 05/07/2014 04:18 PM, Wladimir wrote:
> On Wed, May 7, 2014 at 9:57 PM, Jameson Lopp <jameson.lopp@gmail.com> wrote:
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>> I agree that it would be awesome to offer these types of stats with the installer; unfortunately the route I've taken has dependencies on several other other pieces of software to do all the heavy lifting of stats aggregation and chart rendering. I'm assuming that you would not want to build any of that processing into Bitcoin Core itself; would you be opposed to packaging other software along with the installer?
>
> Depends on just how much stuff it is. The idea is primarily to have an
> installer for running a (wallet-less) node as an OS background
> service.
>
> Having some statistics available would be worth some extra download
> size, otherwise it would be pretty much invisible.
>
> We'd already decided that we would need something like Python for the
> stats service. Implementing things like web services in C++ is just
> not realistic given the time constraints and the great already-written
> code that is out there. As an optional tool it should be external, not
> part of bitcoind itself.
>
> I suppose the chart rendering happens client-side? In that case the
> web service just has to collect and provide the data, and serve static
> html/js files.
>
> Wladimir
>

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