Sorry for the delayed reply. > On Aug 6, 2025, at 6:05 AM, Henrik Ingo <hen...@nyrkio.com> wrote: > > Hi Dave > > Thanks for stepping in, I was hoping for someone to help us do this > properly. (And some weeks ago googled a bit, but it seems we should be > aligned with the ASF policies I read them, but have forgotten now which > they were...) > > > On Wed, Aug 6, 2025 at 2:14 AM Dave Fisher <w...@apache.org> wrote: > >> Before 2 there is some due diligence required. Maybe the following has >> been discussed and I missed it, but: >> >> > No, this is the first time we discuss it on this list, properly. (And it > wasn't until this thread that I've been convinced we have to merge these > two pieces of code. > > To start with the basics, we currently depend on this pip package. > https://pypi.org/project/signal-processing-algorithms/ > > The public source code repo is > https://github.com/mongodb/signal-processing-algorithms > If you dig into it, you will quickly realize this is not MongoDB's main > development repo, rather a public repo where new code is periodically > published, perhaps in relation to some article being published at a > conference. In particular, the repo doesn't use tags to denote release > versions, so we would have to go by date and just tribal knowledge to check > out the correct point in time that corresponds to the rather old version > 1.something that Otava still depends on. > > It is the very heart of Otava, the math, while the code in apache/otava > repo adds a CLI interface, support for CSV input as well as several > databases, configuration files, and I believe some notification mechanism? > Slack / email??? > > 2a. Is this signal processing code Apache License, v2.0? >> > > Yes, as can be clearly verified from both of the above links. > > >> 2b. What is the IP provenance of this signal processing code? Who holds >> the copyright? >> > > This was written 100% by MongoDB employees and published with the > appropriate approval processes. For the version we use most of the code was > written by William Brown and Jim O'Leary. Later code I was no longer there, > but I believe was written by David Bradford and Alexander Costas. (David > Daly will now better, and we're still hoping the current author would > actually show up here...)
Then as far as copyright is concerned this code is © MongoDB. To be added directly to Otava then an SGA from MongoDB is likely to be required. [1] [1] https://www.apache.org/licenses/contributor-agreements.html#grants The IP Clearance process while done in the Incubator is for PMCs and not podlings. > > >> 2c. How large is this codebase? >> >> > > The initial dump seems to be 2600 lines. The commit history after that is > relatively short, and in any case we don't currently use the newer features. That’s substantial enough so that an SGA is preferred to a fork. Any details about negotiating this process should proceed on the private list. > > For context, an old version of Otava I happened to have checked out as I > write this, is 6200 lines. > > For historical context, we did approach MongoDB when we were submitting the > proposal for the incubator project. As far as I could tell they were > generally positive, but on a corporate level the response was more like > "what's the point" / "what's the benefit". Once I confirmed that we don't > need MongoDB's participation, as the code is already Apache licensed > anyway, the discussion quickly died out. The two people who cared about > this, Davdid Daly and Matt Asay, have since both left MongoDB. Let’s review those comms on the private list. Best, Dave > > henrik > > -- > *nyrkio.com <http://nyrkio.com/>* ~ *git blame for performance* > > Henrik Ingo, CEO > hen...@nyrkio.com LinkedIn: > www.linkedin.com/in/heingo > +358 40 569 7354 Twitter: twitter.com/h_ingo
