[KUDU-1444] Get resource usage of a scan in KuduScanner

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.10.0
• Code Review: https://gerrit.cloudera.org/#/c/3013/
• Assignee: ZhangZhen
• Reporter: ZhangZhen
• Created: 09/May/16 11:57
• Updated: 14/Jul/16 16:01
• Resolved: 03/Jun/16 21:29

Description

As Kudu supports predicates push down, bytes size of rows returned to the kudu client may differs a lot with the bytes size read from disk in tablet server side when running a scan. In some cases, the client side may need to know the actual resource usage. For example, impala may need this so it can estimate a query's actual resource usage.