GitHub user WeichenXu123 opened a pull request:
https://github.com/apache/spark/pull/14922
[WIP][SPARK-17175] Add a expert formula to aggregationDepth of SharedParam
## What changes were proposed in this pull request?
Add a expert formula to aggregationDepth of SharedParam
The proper aggregationDepth depends on the memory setting of driver, the
dimension of problems, and the number of partition, etc.
Now I choose a simple formula when dimension exceed a threshold then set
aggregationDepth to 2 otherwise 1.
I will do more test later on and improve the formula by considering more
parameters.
## How was this patch tested?
Existing test.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/WeichenXu123/spark
expert_formula_for_treeAggregate
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/14922.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #14922
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commit 08fcb7c76eef39a3b9075d788365cb11f68c9c04
Author: WeichenXu <[email protected]>
Date: 2016-09-01T01:14:57Z
update.
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