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From Ted Dunning <tdunn...@veoh.com>
Subject Re: computing conditional probabilities with Hadoop?
Date Tue, 02 Oct 2007 01:17:49 GMT

This is a common requirement.

Left unchanged would be fine but is probably very hard to enforce because of
the many map tasks and some uncertainty about which maps finished first.
Similarly useful would be the ability to require a particular sort ordering
on reduce values.

On 10/1/07 6:05 PM, "Chris Dyer" <redpony@umd.edu> wrote:

> Does anyone know if Hadoop guarantees (can be made to guarantee) that the
> relative order of keys that are equal will be left unchanged? 

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