optimize estimation of number of reducers and local mode
--------------------------------------------------------
Key: HIVE-1486
URL: https://issues.apache.org/jira/browse/HIVE-1486
Project: Hadoop Hive
Issue Type: Improvement
Components: Query Processor
Reporter: Joydeep Sen Sarma
Hive uses file system metadata to estimate number of reducers and to determine
if jobs can be executed locally. This currently looks up file system metadata
about each path serially and can take a long time in case number of files is
very high.
instead we can lookup part of the input space and try to approximate the size
etc. summaries
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
