coneyliu created SPARK-19956:
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Summary: Optimize a location order of blocks with topology
information
Key: SPARK-19956
URL: https://issues.apache.org/jira/browse/SPARK-19956
Project: Spark
Issue Type: Improvement
Components: Spark Core
Affects Versions: 2.1.0
Reporter: coneyliu
When call the method getLocations of BlockManager, we only compare the data
block host. Random selection for non-local data blocks, this may cause the
selected data block to be in a different rack. So in this patch to increase the
sort of the rack.
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