Chromium experiments remote

[s0nicyouth]

Hi.

Are there some possibilities for server side experiments enabling?

For example is it possible to turn on/off some features remotelly? I know that it's possible to enable some functionallyty for certain amount of users but it's made locally by rolling the dice as I know, so maybe there is some backend systems for this for remote configuring client's Chromium?

[Alexei Svitkine]

The dice roll still happens on the client, but there is infrastructure to retrieve the list of experiments and their probabilities from a server. Although, it's not enabled by default in Chromium builds, only Google Chrome.

There's a bit more info on this on this blog post, when this was introduced: http://blog.chromium.org/2012/05/changes-to-field-trials-infrastructure.html

-Alexei

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[s0nicyouth]

Thanks for the info. Could you please point me to file in which this infrastructure lives because this article is very short and quick looking for it gives no results for me?

[Alexei Svitkine]

That infrastructure is implemented in VariationsService and related classes:

https://cs.chromium.org/chromium/src/components/variations/service/variations_service.cc

[s0nicyouth]

Thanks again. As I understand the server implementation is proprietary?

[Alexei Svitkine]

Correct, the server is not open source.