On Wed, Jun 15, 2011 at 08:46:10AM +1000, Aaron Peachey wrote: > On 6/14/11, Matthew Paul Thomas <[email protected]> wrote: > > > Generation > > > > By default, the "Recommended for you" box contains only a "Turn On > > Recommendations" button, and an explanation that turning them on > > will submit data about what software you have installed. When you > > turn it on, USC securely submits to the server a list of all the > > packages you have installed, together with a UUID and (if you're > > signed in) your SSO ID to link with your ratings. So you don't need > > to sign in to an SSO account to get recommendations, you just need > > to click one button. > > How do we cater for people whose computer is used by multiple people? > Should we add local username to the UUID to ensure it's unique (when > some or all of the users don't have an SSO account?
A good point! This looks like the UUID needs to be per-user which rules out to re-use the popcon UUID unless we append the username as you suggest. > > Whenever you submit the data (which is whenever you install, > > remove, or rate anything subsequently), the server uses a > > recommender algorithm > > <http://en.wikipedia.org/wiki/Recommendation_system#Algorithms> to > > identify the ~50 packages you don't have installed that you're > > most likely to rate as excellent. > > <http://cacm.acm.org/blogs/blog-cacm/22925-what-is-a-good-recommendation-algorithm/fulltext> > > Does the algorithm take software ratings into account as well as > whether it is installed? Is it less effective if someone has never > rated software themselves (i.e. Users without an SSO account)? > > Should we revisit the discussion about the pros and cons of 5 star > system before we implement this? It seems like we should consider making it easier to the user to express "I like/dislike this app" without having to write a full review as we should benefit from the data. > > Serving > > > > When sent a request containing the UUID, the server returns a > > space-separated ordered list of packages representing the > > recommendations for that UUID. > > Any reason why it should be space separated or is this just for example's > sake? I think Matthew just put this out as a example. I'm pretty sure the actual implementation will use something more standard like JSON. [..] > > One thing I am really fuzzy on is what should happen if you use multiple > > computers for different purposes. They'll have different UUIDs, but > > you'll be signed in to the same SSO account. > Good point. I think SSO account should take precedence so that > recommendations are seamlessly portable, but the algorithm then needs > to get the union of installed packages across 2 or more PCs. Its a interessting question what people would expect here. If I have a dedicated game machine and productivity machine then we should have two different recommendations. If OTOH I have a laptop and a desktop that I use for the same things the recommendations should be the same. Hopefully the system can work it out from the context. [..] > Overall, this is an exciting feature for us to work on. > Love the concept and think the approach is a good one. Yeah, I agree. Good recommendations will be yet another killer feature of software-center :) Cheers, Michael _______________________________________________ Mailing list: https://launchpad.net/~software-store-developers Post to : [email protected] Unsubscribe : https://launchpad.net/~software-store-developers More help : https://help.launchpad.net/ListHelp
