GitHub user tanejagagan opened a pull request:
https://github.com/apache/spark/pull/17035
[SPARK-19705][SQL] Preferred location supporting HDFS cache for FileSâ¦
â¦canRDD
Added support of HDFS cache using TaskLocation.inMemoryLocationTag
NewHadoopRDD and HadoopRDD both support HDFS cache using
TaskLocation.inMemoryLocationTag
where "hdfs_cache_" is added to hostname which is then interpretted by
scheduler
With this enhacement same tag ("hdfs_cache_") will be added to hostname if
FilePartition only contains single file and the file is cached on one or more
host
Current implementation would not cased where FilePartition would have
multiple files as preferredLocation calculation is more complex.
## What changes were proposed in this pull request?
(Please fill in changes proposed in this fix)
## How was this patch tested?
(Please explain how this patch was tested. E.g. unit tests, integration
tests, manual tests)
(If this patch involves UI changes, please attach a screenshot; otherwise,
remove this)
Please review http://spark.apache.org/contributing.html before opening a
pull request.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/tanejagagan/spark branch-19705
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/17035.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 #17035
----
commit a9288e56f30f7d9f051e06502171d7f2639913a7
Author: gagan taneja <[email protected]>
Date: 2017-02-23T07:26:36Z
[SPARK-19705][SQL] Preferred location supporting HDFS cache for FileScanRDD
Added support of HDFS cache using TaskLocation.inMemoryLocationTag
NewHadoopRDD and HadoopRDD both support HDFS cache using
TaskLocation.inMemoryLocationTag
where "hdfs_cache_" is added to hostname which is then interpretted by
scheduler
With this enhacement same tag ("hdfs_cache_") will be added to hostname if
FilePartition only contains single file and the file is cached on one or more
host
Current implementation would not cased where FilePartition would have
multiple files as preferredLocation calculation is more complex.
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