add map joined table to distributed cache
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Key: HIVE-1641
URL: https://issues.apache.org/jira/browse/HIVE-1641
Project: Hadoop Hive
Issue Type: Improvement
Components: Query Processor
Reporter: Namit Jain
Fix For: 0.7.0
Currently, the mappers directly read the map-joined table from HDFS, which
makes it difficult to scale.
We end up getting lots of timeouts once the number of mappers are beyond a few
thousand, due to
concurrent mappers.
It would be good idea to put the mapped file into distributed cache and read
from there instead.
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