Eugene Koifman created HIVE-18709: ------------------------------------- Summary: Enable Compaction to work on more than one partition per job Key: HIVE-18709 URL: https://issues.apache.org/jira/browse/HIVE-18709 Project: Hive Issue Type: Improvement Components: Transactions Affects Versions: 1.0.0 Reporter: Eugene Koifman Assignee: Eugene Koifman
currently compaction launches 1 MR job per partition that needs to be compacted. The number of tasks is equal to the number of buckets in the table (or number or writers in the 'widest' write). The number of AMs in a cluster is usually limited to a small percentage of the nodes. This limits how much compaction can be done in parallel. Investigate what it would take for a single job to be able to handle multiple partitions. -- This message was sent by Atlassian JIRA (v7.6.3#76005)