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Posted to dev@rocketmq.apache.org by "orchidFang (via GitHub)" <gi...@apache.org> on 2023/05/31 06:14:15 UTC
[GitHub] [rocketmq] orchidFang created a discussion: 一主两从的部署相较一主一从RT增加百倍
GitHub user orchidFang created a discussion: 一主两从的部署相较一主一从RT增加百倍
目前部署方式：
3namserver
3controller
3broker（1主2从）
broker.conf的配置
flushDiskType=SYNC_FLUSH(同步刷盘）
allAckInSyncStateSet=true
利用mqadmin的clusterRT和CheckMsgSendRT来进行测试
在一主一从（2 broker）的情况下RT为2ms，
而在一主二从（3broker）的情况下RT高达450ms，
请问为什么在多了一个从节点的情况下RT增加这么多？
GitHub link: https://github.com/apache/rocketmq/discussions/6839
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[GitHub] [rocketmq] RongtongJin added a comment to the discussion: 一主两从的部署相较一主一从RT增加百倍
Posted by "RongtongJin (via GitHub)" <gi...@apache.org>.
GitHub user RongtongJin added a comment to the discussion: 一主两从的部署相较一主一从RT增加百倍
> 目前部署方式： 3namserver 3controller 3broker（1主2从）
>
> broker.conf的配置 flushDiskType=SYNC_FLUSH(同步刷盘） allAckInSyncStateSet=true
>
> 利用mqadmin的clusterRT和CheckMsgSendRT来进行测试 在一主一从（2 broker）的情况下RT为2ms， 而在一主二从（3broker）的情况下RT高达450ms， 请问为什么在多了一个从节点的情况下RT增加这么多？
另一个从节点与其他两个节点之间是否隔的比较远？可以ping下。
GitHub link: https://github.com/apache/rocketmq/discussions/6839#discussioncomment-6046921
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[GitHub] [rocketmq] GenerousMan added a comment to the discussion: 一主两从的部署相较一主一从RT增加百倍
Posted by "GenerousMan (via GitHub)" <gi...@apache.org>.
GitHub user GenerousMan added a comment to the discussion: 一主两从的部署相较一主一从RT增加百倍
It is possible to encounter the situation you described when there are three replicas, which is caused by this piece of code:
During the first acknowledgement check, the three replicas may not have all been confirmed yet, resulting in entering the next loop. When i=1, the return of the sending result will be delayed by one second.
GitHub link: https://github.com/apache/rocketmq/discussions/6839#discussioncomment-6060818
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[GitHub] [rocketmq] orchidFang added a comment to the discussion: 一主两从的部署相较一主一从RT增加百倍
Posted by "orchidFang (via GitHub)" <gi...@apache.org>.
GitHub user orchidFang added a comment to the discussion: 一主两从的部署相较一主一从RT增加百倍
1. 三个节点处于同一局域网内，ping为0.1ms左右。
2. 这三个broker节点，无论停掉哪个节点，只剩一个1主1从的情况下，其RT均为2ms左右，要是三个节点都启动，1主2从的方式RT则为400ms，所以判断不是某个节点的问题。
3. 三个节点的配置相同。
配置如下：
<img width="609" alt="image" src="https://github.com/apache/rocketmq/assets/6478487/6da67b54-a107-4ed5-936d-a841128c4f20">
GitHub link: https://github.com/apache/rocketmq/discussions/6839#discussioncomment-6050150
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[GitHub] [rocketmq] orchidFang added a comment to the discussion: 一主两从的部署相较一主一从RT增加百倍
Posted by "orchidFang (via GitHub)" <gi...@apache.org>.
GitHub user orchidFang added a comment to the discussion: 一主两从的部署相较一主一从RT增加百倍
1. 三个节点处于同一局域网内，ping为0.1ms左右。
2. 这三个broker节点，无论停掉哪个节点，只剩一个1主1从的情况下，其RT均为2ms左右，要是三个节点都启动，1主2从的方式RT则为400ms，所以判断不是某个节点的问题。
3. 三个节点的配置相同。
配置如下：
<img width="609" alt="image" src="https://github.com/apache/rocketmq/assets/6478487/6da67b54-a107-4ed5-936d-a841128c4f20">
GitHub link: https://github.com/apache/rocketmq/discussions/6839#discussioncomment-6050146
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[GitHub] [rocketmq] RongtongJin added a comment to the discussion: 一主两从的部署相较一主一从RT增加百倍
Posted by "RongtongJin (via GitHub)" <gi...@apache.org>.
GitHub user RongtongJin added a comment to the discussion: 一主两从的部署相较一主一从RT增加百倍
另外可以贴一下配置，三个节点的配置是否相同。理论上，延迟不会差这么多
GitHub link: https://github.com/apache/rocketmq/discussions/6839#discussioncomment-6046939
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[GitHub] [rocketmq] RongtongJin added a comment to the discussion: 一主两从的部署相较一主一从RT增加百倍
Posted by "RongtongJin (via GitHub)" <gi...@apache.org>.
GitHub user RongtongJin added a comment to the discussion: 一主两从的部署相较一主一从RT增加百倍
@orchidFang Fix in #6850
GitHub link: https://github.com/apache/rocketmq/discussions/6839#discussioncomment-6067133
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[GitHub] [rocketmq] orchidFang deleted a comment on the discussion: 一主两从的部署相较一主一从RT增加百倍
Posted by "orchidFang (via GitHub)" <gi...@apache.org>.
GitHub user orchidFang deleted a comment on the discussion: 一主两从的部署相较一主一从RT增加百倍
1. 三个节点处于同一局域网内，ping为0.1ms左右。
2. 这三个broker节点，无论停掉哪个节点，只剩一个1主1从的情况下，其RT均为2ms左右，要是三个节点都启动，1主2从的方式RT则为400ms，所以判断不是某个节点的问题。
3. 三个节点的配置相同。
配置如下：
<img width="609" alt="image" src="https://github.com/apache/rocketmq/assets/6478487/6da67b54-a107-4ed5-936d-a841128c4f20">
GitHub link: https://github.com/apache/rocketmq/discussions/6839#discussioncomment-6050146
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