[SOLR-11718] Deprecate CDCR Buffer APIs and set Buffer to "false"

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Abandoned
• Fix Version/s: 8.1, 9.0
• Component/s: CDCR
• Assignee: Varun Thacker
• Reporter: Amrit Sarkar
• Created: 04/Dec/17 07:53
• Updated: 12/May/22 00:26
• Resolved: 10/Feb/22 10:18

Description

Kindly see the discussion on SOLR-11652.

Today, if we see the current CDCR documentation page, buffering is "disabled" by default in both source and target. We don't see any purpose served by Cdcr buffering and it is quite an overhead considering it can take a lot heap space (tlogs ptr) and forever retention of tlogs on the disk when enabled. Also today, even if we disable buffer from API on source , considering it was enabled at startup, tlogs are never purged on leader node of shards of source, refer jira: SOLR-11652