Priyesh K created HDDS-15065:
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Summary: Reduce Ratis snapshot creation gap to eliminate SCM flush
delay and remove redundant Ozone configuration
Key: HDDS-15065
URL: https://issues.apache.org/jira/browse/HDDS-15065
Project: Apache Ozone
Issue Type: Bug
Components: SCM
Reporter: Priyesh K
Assignee: Priyesh K
This is a follow-up to HDDS-8485.
The issue of delayed delete block processing in SCM still persists due to
internal behavior in Apache Ratis.
Although a timer-based flush mechanism was introduced, its effectiveness is
limited because Ratis enforces a *minimum transaction gap (1024)* before
triggering certain operations such as snapshot-related checks.
*Code Reference: [RaftServerImpl (lines
1317–1320)|https://github.com/apache/ratis/blob/f141e10551a1bef69c0c7387dd184bc88e821b6d/ratis-server/src/main/java/org/apache/ratis/server/impl/RaftServerImpl.java#L1317-L1320]*
Because of this constraint, flush operations remain indirectly gated by the
transaction gap, negating the intended benefit of the timer-based approach.
*Proposed Fix*
* Reduce the value of {{ozone.scm.ha.ratis.server.snapshot.creation.gap}} from
*1024 to 1*
* Remove this configuration from Ozone to avoid duplication and rely on
appropriate defaults within Ratis
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