Structure of Erlang MR Arg

Jeremiah Peschka jeremiah.peschka at gmail.com
Tue Feb 26 09:58:14 EST 2013


Excellent, thanks much for the clarification.

---
Jeremiah Peschka - Founder, Brent Ozar Unlimited
MCITP: SQL Server 2008, MVP
Cloudera Certified Developer for Apache Hadoop


On Tue, Feb 26, 2013 at 6:18 AM, Bryan Fink <bryan at basho.com> wrote:

> On Feb 26, 2013, at 9:16 AM, Bryan Fink <bryan at basho.com> wrote:
> >> {"reduce":{"language":"erlang",
> ...
> >>           "arg":{"do_prereduce":true,
> >>                  "reduce_phase_batch_size": 250
> ...
>
> I should have also mentioned that `do_prereduce` is actually a *map* phase
> argument. It is only applicable when a map phase is followed by a reduce
> phase.
>
> -Bryan
>
>
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