Xinyu Tan created IOTDB-6266:
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Summary: Add the ability to flush syncIndex and update reader
periodically for IoTConsensus
Key: IOTDB-6266
URL: https://issues.apache.org/jira/browse/IOTDB-6266
Project: Apache IoTDB
Issue Type: Improvement
Reporter: Xinyu Tan
Assignee: Xinyu Tan
Attachments: image-2023-12-11-17-43-20-151.png
After the PR is merged , The safeDeletedSearchIndex passed by IoTConsensus to
the wal reader is no longer the syncIndex that has been synchronized, but the
SyncIndex that has been flushed to disk.
When a leader migration is triggered, the problem may occur that the wal of the
old leader can never be deleted, resulting in a pile-up of the wal.
!image-2023-12-11-17-43-20-151.png!
To solve this problem, iotconsensus can add a way to flush syncIndex and update
reader periodically to avoid the accumulation of the old leader's log after the
leader switch
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