Thanks Francois for the comment and useful link. I understand the problem
better now.
best,
/Shahab
On Wed, Feb 18, 2015 at 10:36 AM, francois.garil...@typesafe.com wrote:
In a nutshell : because it’s moving all of your data, compared to other
operations (e.g. reduce) that summarize it in
In a nutshell : because it’s moving all of your data, compared to other
operations (e.g. reduce) that summarize it in one form or another before moving
it.
For the longer answer:
Hi,
Based on what I could see in the Spark UI, I noticed that groupBy
transformation is quite slow (taking a lot of time) compared to other
operations.
Is there any reason that groupBy is slow?
shahab
