[HIVE-22820] Proactive LLAP cache eviction

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Component/s: llap
• Assignee: Ádám Szita
• Reporter: Ádám Szita
• Created: 03/Feb/20 15:25
• Updated: 16/Feb/22 13:20
• Resolved: 16/Feb/22 13:20

Description

Currently LLAP cache eviction is only based on an eviction policy, that is reactive in a way that it only evicts buffers whenever there's space required for new ones.

It does not take for example dropped entities (partitions, tables or even dbs) into consideration. We should also implement a proactive side of the eviction that does this for us, and in turn could increase overall cache hit ratios.