GitHub user maropu opened a pull request:
https://github.com/apache/spark/pull/13137
[SPARK-15247][SQL] Set the default number of partitions for reading parquet
schemas
## What changes were proposed in this pull request?
This pr sets the default number of partitions when reading parquet schemas.
SQLContext#read#parquet currently yields at least n_executors * n_cores
tasks even if parquet data consist of a single small file. This issue could
increase the latency for small jobs.
## How was this patch tested?
Manually tested and checked.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/maropu/spark SPARK-15247
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/13137.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 #13137
----
commit 93d5807a13f1b59101910846e61fec5696d8068d
Author: Takeshi YAMAMURO <[email protected]>
Date: 2016-05-12T13:25:04Z
Set the number of partitions for reading parquet schema
----
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
