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https://issues.apache.org/jira/browse/RATIS-1886?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17764965#comment-17764965
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Yaolong Liu edited comment on RATIS-1886 at 9/14/23 4:11 AM:
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Alluixio client ping alluxio master : 0.035 ~ 0.053ms
use one Alluxio client with 256 thread:
{code:java}
1ms :
mMeanTimeMs : 22.706211
mTime99PercentileMs: 29.458431
throughput: 11269.238
0ms：
mMeanTimeMs : 21.291473
mTime99PercentileMs: 27.099136
throughput: 12013.196
{code}
There is not much difference in performance
was (Author: JIRAUSER280039):
Alluixio client ping alluxio master : 0.035 ~ 0.053ms
use one Alluxio client with 256 thread:
1ms :
mMeanTimeMs : 22.706211
mTime99PercentileMs: 29.458431
throughput: 11269.238
0ms：
mMeanTimeMs : 21.291473
mTime99PercentileMs: 27.099136
throughput: 12013.196
There is not much difference in performance
> 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
> Priority: Major
> 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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