[HIVE-518] test mode in hive

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.4.0
• Component/s: Query Processor
• Assignee: Namit Jain
• Reporter: Namit Jain
• Created: 26/May/09 20:45
• Updated: 17/Dec/11 00:07
• Resolved: 28/May/09 08:02

Description

It would be good to have a test mode in hive - this will help in checking the validity of a hive drop on a production cluster.

The following would be good to have:

Testmode --> In testmode, all input tables are sampled (if not already sampled) and all output tables are prefixed by a user supplied name.
This way, multiple hive drops can be compared quickly for correctness

New Options:

// whether hive is running in test mode. If yes, it turns on sampling and prefixes the output tablename
set hive.test.mode=true;
// if hive is running in test mode, prefixes the output table by this string
set hive.test.mode.prefix=;
// if hive is running in test mode and table is not bucketed, sampling frequency
set hive.test.mode.samplefreq=256;
// if hive is running in test mode, dont sample the above comma seperated list of tables
set hive.test.mode.nosamplelist=;