"This discussion should probably be moved to the web2py developers group:"
I don't have access to the web2py developers group. But maybe that is the point. See why I don't like the separation? I am no novice to open source. I know that not every patch will be accepted, but every project has varying levels of acceptance. Adding document-database support to the DAL is not a small change, and I would not interested in sinking the required large amount of time into unless it would be accepted.This is why I first contacted Massimo. Recently, I had been researching distributed databases for quite some time. While I am not a relational algebra expert, I believe that document based databases such as Amazon SimpleDB/MongoDB/CouchDB can be reasonably translated to and from a relational model. In fact, the document based model is closer to an object oriented design since it is schema free. The map/reduce paradigm also allows you to scale complex queries to multiple cores and machines. For everything except banking, document based stores are the future. On Jul 21, 12:15 pm, Yarko Tymciurak <yark...@gmail.com> wrote: > On Tue, Jul 21, 2009 at 1:51 PM, Bottiger <bottig...@gmail.com> wrote: > > > Do you mean that we will support couchdb or that the DAL will allow > > support? > > This discussion should probably be moved to the web2py developers group: > > I suggested that a clean, column-oriented DAL would be an interesting > experiment / excercise. > This was mostly because of discussions around GAE, how big tables api offers > things that didn't fit well into DAL abstraction, etc. > > Rather than make something GAE specific, I suggested - in order to force > discovering a "useful" abstraction - to select several column stores which > were most likely to have use (e.g. testors, interested, knowledgable > parties). > > Support seems highly premature in the discussion; the experiment should show > something first, and then - to me an interesting - a review of the overlap, > lack or, possibility for better overlap between (what I dubbed, for > 'column') C-DAL and current, or R-DAL would make for an interesting meeting > / session. > > From this motivation, I hesitated to throw couchDB in the mix, as I think > its different enough that it would potentially muddy the discovery of a > crisp abstraction (I would be more for investigating the abstraction by > adding something like couchDB to a second stage of the experiment - > extending C-DAL, and testing how the abstraction holds up). > > Anyway, those are my thoughts and motivations. > > > I've talked to the CouchDB developers and they have said that its > > currently in Alpha and they will probably be making changes that break > > backwards compatibility. > > the Alpha state (which I also heard @ ChiPy) was another reason my gut is > not for throwing couchDB in the mix for first phase of the experiment... but > those who do it should decide. I think the more important thing is creating > / finding / working out a "correct" abstraction for column-stores, and then > comparing w/ DAL and seeing what new insights that may give us. > > > MongoDB on the other hand, is nearing 1.0 > > release by the summer and is now being used by sourceforge. > > This, like couchDB, is classified as another "document oriented" db... just > on that, I would hold those off to see how they play w/ column-oriented > abstraction; > > Remember, the thing I would like to see is development of a clean starting > abstraction. Mixing storage types doesn't seem like a good idea (at the > start) for that. > Maybe a separate dal for Mongo/couch ... and later merge w/ column... but > hat feels too much like competition, and not enough like investigation.... I > think investigation is what will yield interesting results. > > - Yarko --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "web2py-users" group. To post to this group, send email to web2py@googlegroups.com To unsubscribe from this group, send email to web2py+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/web2py?hl=en -~----------~----~----~----~------~----~------~--~---
