[IMPALA-4634] Investigate enabling FS handle caching

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: Impala 2.8.0
• Fix Version/s: Impala 2.12.0
• Component/s: Backend
• Target Version: Product Backlog
• Assignee: Joe McDonnell
• Reporter: Bharath Vissapragada
• Created: 09/Dec/16 17:35
• Updated: 04/Oct/18 17:11
• Resolved: 04/Oct/18 17:11

Description

FS handle caching is already built into the disk-io-mgr but was disabled since it wasn't properly tested. Investigate the potential issues that could arise when enabling it and fix them. This helps reduce NN rpc.