I am still reading but one interesting question is why you decide to put CBO in physical layer?

Dmitriy Ryaboy wrote:
Whoops :-)
Here's the Google doc:


On Tue, Sep 1, 2009 at 12:51 PM, Santhosh Srinivasan<s...@yahoo-inc.com> wrote:
Dmitriy and Gang,

The mailing list does not allow attachments. Can you post it on a
website and just send the URL ?


-----Original Message-----
From: Dmitriy Ryaboy [mailto:dvrya...@gmail.com]
Sent: Tuesday, September 01, 2009 9:48 AM
To: pig-dev@hadoop.apache.org
Subject: Request for feedback: cost-based optimizer

Hi everyone,
Attached is a (very) preliminary document outlining a rough design we
are proposing for a cost-based optimizer for Pig.
This is being done as a capstone project by three CMU Master's students
(myself, Ashutosh Chauhan, and Tejal Desai). As such, it is not
necessarily meant for immediate incorporation into the Pig codebase,
although it would be nice if it, or parts of it, are found to be useful
in the mainline.

We would love to get some feedback from the developer community
regarding the ideas expressed in the document, any concerns about the
design, suggestions for improvement, etc.

Dmitriy, Ashutosh, Tejal

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