ian Hyde <jh...@apache.org>
Sent: Friday, January 13, 2017 11:00 PM
To: d...@drill.apache.org
Subject: Re: Drill: Memory Spilling for the Hash Aggregate Operator
The attachment didn't come through. I'm hoping that you settled on a "hybrid"
hash algorithm that can write to disk, or w
Hi Julian,
Yes, the model used for the memory spilling is the “hybrid” one — the
memory space is pre-divided into “partitions” (based on the hash values of the
key columns), and then as needed only some of the partitions would end up
spilled to secondary storage (e.g. HDD), hence after
