[SPARK-40957] Add in memory cache in HDFSMetadataLog

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.4.0
• Fix Version/s: 3.4.0
• Component/s: Structured Streaming
• Assignee: Boyang Jerry Peng
• Reporter: Boyang Jerry Peng
• Created: 28/Oct/22 17:23
• Updated: 04/Nov/22 17:36
• Resolved: 02/Nov/22 13:24

Description

Every time entries in offset log or commit log needs to be access, we read from disk which is slow.  Can a cache of recent entries to speed up reads.

Issue Links

• contains: SPARK-40025 Project Lightspeed: Faster and Simpler Stream Processing with Apache Spark
• Is contained by: SPARK-40025 Project Lightspeed: Faster and Simpler Stream Processing with Apache Spark
• links to: [Github] Pull Request #38430 (jerrypeng)
• links to: [Github] Pull Request #38430 (jerrypeng)