Alex, Viktor, i think write semantics could get complicated quickly, actually. However, i was initially responding to the idea that trad business object models don't give way to analytics. Being able to make read-only queries against large volumes of data using the original business object schema seems to me like a win -- even if it's only used to populate a db that's sliced up in a different way for further analytics processing.
Best wishes, --greg On Wed, Jul 22, 2009 at 2:44 PM, Alex Cruise <[email protected]> wrote: > > Viktor Klang wrote: > > Absolutely, perhaps I'm tainted by write-heavy systems and perhaps I'm > > just failing to see the overhead we're talking about. > > Perhaps I overlooked it, but the paper didn't mention performance for > > small writes and potentially multiple nodespanning transactions. > HadoopDB makes no claim to any support for writes at all, I'm just > speculating that It Should Be Possible given my understanding of its > architecture, which is admittedly limited and based solely on reading > the paper and a bit of the code. :) > > I'm inclined to believe that some sort of immutable records storage > > would simlify the semantics (analytic queries are IMHO very seldom > > demanding real-time snapshots) > Analytical queries against static data are exactly what it's for. I > have no experience with its competition, namely parallel/distributed > column-oriented databases, so I can't say whether they're any happier > with writes. > > FYI I brought up HadoopDB on the NoSQL list too but so far not too many > takers... > > -0xe1a > > > > -- L.G. Meredith Managing Partner Biosimilarity LLC 1219 NW 83rd St Seattle, WA 98117 +1 206.650.3740 http://biosimilarity.blogspot.com --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Lift" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~----------~----~----~----~------~----~------~--~---
