[HIVE-14828] Cloud/S3: Stats publishing should be on HDFS instead of S3

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.2.0
• Fix Version/s: 1.3.0
• Component/s: Statistics
• Assignee: Rajesh Balamohan
• Reporter: Rajesh Balamohan
• Created: 23/Sep/16 07:12
• Updated: 20/Oct/16 00:18
• Resolved: 11/Oct/16 21:38

Description

Currently, stats files are created in S3. Later as a part of FSStatsAggregator, it reads this file and populates MS again.

2016-09-23 05:57:46,772 INFO  [main]: fs.FSStatsPublisher (FSStatsPublisher.java:init(49)) - created : s3a://BUCKET/test/.hive-staging_hive_2016-09-23_05-57-34_309_2648485988937054815-1/-ext-10001
2016-09-23 05:57:46,773 DEBUG [main]: fs.FSStatsAggregator (FSStatsAggregator.java:connect(53)) - About to read stats from : s3a://BUCKET/test/.hive-staging_hive_2016-09-23_05-57-34_309_2648485988937054815-1/-ext-10001

Instead of this, stats can be written directly on to HDFS and read locally instead of S3, which would help in reducing couple of calls to S3.

Issue Links

• is related to: HIVE-13925 ETL optimizations