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Re: [PhillyOnRails] jruby + hadoop?
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If CouchDB makes it out of beta, I would love to use an ActiveRecord
implementation of this for very simple web sites like blogs. I think
the revisions feature should be made optional, otherwise the storage
file could blow up faster than the log files, requiring its own
maintenance plan.
This CouchDB approach particularly makes sense for the Rails framework,
where validation and relationships are specified in the model code,
making foreign key specifications and constraints redundant.
In terms of performance, I would love to see how the map/reduce
implementation stacks up to optimized psql statistics, for example.
But for serious applications, I want my RDBMS. Nothing beats having the
model data and relationships where they should be -- entirely in the
database, optimized by procedural functions -- application agnostic.
Thanks!
-Casey
Mat Schaffer wrote:
So granted, I'm still reading the map/reduce paper, but this sorta
drove it home for me I think. Thought I'd share it with those of us
not subscribed to Labnotes already.
http://blog.leetsoft.com/2007/9/2/futuretalk-couchdb
(via http://blog.labnotes.org/2007/09/02/couchdb-thinking-beyond-the-rdbms/)
Granted, it's not hadoop, but it's website-type data without an RDMBS
which put it in perspective pretty nicely. I can sorta imagine this
becoming the norm and RDBMS becoming more of a niche market.
-Mat
On Sep 1, 2007, at 5:34 PM, Michael Bevilacqua-Linn wrote:
Have you read the google paper (doesn't cover hadoop obviously, but a
great intro to the concept, has a section at the end that has a few
blurbs on what/how google is using it.) It's very straightforward
and written in plain English, not academe-ese.
http://labs.google.com/papers/mapreduce.html
MBL
On 9/1/07, *Mat Schaffer* < schapht@gmail.com
<mailto:schapht@gmail.com>> wrote:
On Aug 31, 2007, at 9:12 PM, Evan Weaver wrote:
> PS. Thanks Toby for your June mail about Hadoop; it's totally
on the
> table now :) .
To completely ignore your question and make a selfish comment of my
own: I'd love to see some presentational material on how to really
use hadoop (or map reduce in general).
I've looked at it a couple of times and sorta get it, but I keep
failing to get a firm grasp on what problem spaces it's applicable to
and how.
-Mat
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