Yaolong Liu created RATIS-1886:
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Summary: AppendLog sleep fixed time cause significant drop in
write throughput
Key: RATIS-1886
URL: https://issues.apache.org/jira/browse/RATIS-1886
Project: Ratis
Issue Type: Improvement
Components: server
Affects Versions: 2.5.1
Reporter: Yaolong Liu
Attachments: image-2023-09-13-15-44-00-933.png
In https://issues.apache.org/jira/browse/RATIS-1793 , we enforce
raft.server.log.appender.wait-time.min, which make GrpcLogAppender sleep fixed
time during appendLog. This make alluxio master write throughput drop 50% and
unacceptable. The ops of alluxio master could see below
!image-2023-09-13-15-44-00-933.png!
I noticed that this patch was introduced to avoid leader being too busy in some
error conditions. Could we introduce sleep waiting when an error is discovered
(maybe not easy) or find a way to locate the error condition and repair it
completely? The performance degradation caused by sleeping for each appendLog
request may be underestimated.
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