GitHub user srowen opened a pull request:
https://github.com/apache/spark/pull/18441
[SPARK-21137][CORE] Spark reads many small files slowly
## What changes were proposed in this pull request?
Parallelize FileInputFormat.listStatus in Hadoop API via
LIST_STATUS_NUM_THREADS to speed up examination of file sizes for
wholeTextFiles et al
## How was this patch tested?
Existing tests, which will exercise the key path here: using a local file
system.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/srowen/spark SPARK-21137
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/18441.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 #18441
----
commit 2fc2d9a3b66407666c57484cd20d74a49f62df27
Author: Sean Owen <[email protected]>
Date: 2017-06-27T21:11:10Z
Parallelize FileInputFormat.listStatus in Hadoop API via
LIST_STATUS_NUM_THREADS to speed up examination of file sizes for
wholeTextFiles et al
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