[HDFS-16650] Optimize the cost of obtaining timestamps in Centralized cache management

• Type: Improvement
• Status: In Progress
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 2.9.2
• Component/s: caching
• Labels: pull-request-available
• Assignee: JiangHua Zhu
• Reporter: JiangHua Zhu
• Created: 04/Jul/22 12:48
• Updated: 07/Jul/22 05:58

Description

Getting timestamps in Centralized cache management is done in the following ways:

long now = new Date().getTime();

This approach doesn't seem to be optimal since we only use it once here.
It might be better to use the tool Time to get the timestamp. E.g:

long now = Time.now();

Issue Links

• is related to: HDFS-4949 Centralized cache management in HDFS
• links to: GitHub Pull Request #4528