On Wed, Jul 22, 2009 at 11:52 PM, Meredith Gregory <[email protected] > wrote:
> 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. So basically, what's needed on top of HadoopDB is a service that updates data as needed from external data sources. > > > 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 > > > > -- Viktor Klang Rogue Scala-head Twttr: viktorklang --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
