GitHub user hhbyyh reopened a pull request:
https://github.com/apache/spark/pull/4899
[SPARK-6177][MLlib] LDA should check partitions size of the input
JIRA: https://issues.apache.org/jira/browse/SPARK-6177
Add coalesce to LDA example to avoid the possible massive partitions from
`sc.textFile`.
sc.textFile will create RDD with one partition for each file, and the
possible massive partitions downgrades LDA performance.
A more aggressive improvement will be to add coalesce or at least warning
for improper partitioning in LDA.run, sounds good?
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/hhbyyh/spark adjustPartition
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/4899.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 #4899
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commit 26a564ac588ddc695b653b74c7de77d93ea3dcef
Author: Yuhao Yang <[email protected]>
Date: 2015-03-05T05:11:58Z
add coalesce to LDAExample
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