[roskilli]

Can confirm that your confirmation of M3DB being cancelled is incorrect and is actively being worked on at Uber and elsewhere.

I do agree there were definitely projects that were overly ambitious and optimistic that likely that should have been better planned. I think you are weighted firmly at one end of the spectrum however. I have some obvious bias being involved in one of the projects you outlined, but I still think you are blindly covering a swathe of projects in one go without any nuance at all.

[hintymad]

I think M3 is a necessary project for Uber. Open Source solutions like Graphite is really not designed for Uber's scale in this particular case. And yes,

[bogomipz]

What did M3 offer that existing projects at the time such as Prometheus and OpenTSDB did not?

The project page states "M3, a metrics platform, and M3DB, a distributed time series database, were developed at Uber out of necessity. After using what was available as open source and finding we were unable to use them at our scale due to issues with their reliability, cost and operationally intensive nature we built our own metrics platform piece by piece."[1]

[1] https://www.m3db.io/

[merlincorey]

Last I checked, M3 is open source.