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https://issues.apache.org/jira/browse/HIVE-1408?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joydeep Sen Sarma updated HIVE-1408:
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Attachment: 1408.2.patch
1408.2.q.out.patch
v2. this is ready for review.
added tests:
- the tests now use 'pfile:///' namespace as the default warehouse filesystem.
This is served by a proxy filesystem class that passes requests to the local
file system
- this comprehensively tests all the file system issues related to running in
local mode (where there is now a difference between the intermediate data's
file system and the warehouse's file system). there are several small bug fixes
related to bugs discovered because of this test mode.
- there are changes in a lot of test results as a result of the new namespace
as well as because of the changes in tmp file naming. i am attaching a extra
diff (.q.out.patch) that shows only the interesting changes.
- some tests have been modified to run with a non-local setting for the
jobtracker and with auto-local-mode turned on. this tests the new functionality.
- there is one test (archive.q) that's still breaking because of the filesystem
issues. waiting for a fix from pyang. but it should not stop the review.
> add option to let hive automatically run in local mode based on tunable
> heuristics
> ----------------------------------------------------------------------------------
>
> Key: HIVE-1408
> URL: https://issues.apache.org/jira/browse/HIVE-1408
> Project: Hadoop Hive
> Issue Type: New Feature
> Components: Query Processor
> Reporter: Joydeep Sen Sarma
> Assignee: Joydeep Sen Sarma
> Attachments: 1408.1.patch, 1408.2.patch, 1408.2.q.out.patch
>
>
> as a followup to HIVE-543 - we should have a simple option (enabled by
> default) to let hive run in local mode if possible.
> two levels of options are desirable:
> 1. hive.exec.mode.local.auto=true/false // control whether local mode is
> automatically chosen
> 2. Options to control different heuristics, some naiive examples:
> hive.exec.mode.local.auto.input.size.max=1G // don't choose local mode
> if data > 1G
> hive.exec.mode.local.auto.script.enable=true/false // choose if local
> mode is enabled for queries with user scripts
> this can be implemented as a pre/post execution hook. It makes sense to
> provide this as a standard hook in the hive codebase since it's likely to
> improve response time for many users (especially for test queries).
> the initial proposal is to choose this at a query level and not at per
> hive-task (ie. hadoop job) level. per job-level requires more changes to
> compilation (to not pre-commit to hdfs or local scratch directories at
> compile time).
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