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Posted to issues@rocketmq.apache.org by "Jaskey Lam (JIRA)" <ji...@apache.org> on 2017/02/17 02:19:41 UTC

[jira] [Created] (ROCKETMQ-106) Add flow control on topic level

Jaskey Lam created ROCKETMQ-106:
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             Summary: Add flow control on topic level
                 Key: ROCKETMQ-106
                 URL: https://issues.apache.org/jira/browse/ROCKETMQ-106
             Project: Apache RocketMQ
          Issue Type: Wish
          Components: rocketmq-client
            Reporter: Jaskey Lam
            Assignee: Xiaorui Wang


*Motivations*

For current flow control, we can only control on queue level. 

Howerver, the numbers of queue allocated may be dynamic changed. For example, I might hope to control that at most 1000 messages can be pulled from broker to protect my client. And I have no idea how many queue I am allocated. Maybe I will have 5 queue and 5 instances so I set `pullThresholdForQueue`=1000, which works as expected when one is fine. But as long as one instances crashes, one instance will be allocated one more queue, which will make messages pulled from broker exceed my expectations.

A configuration of  `pullThresholdForTopic` is propably most user hopes.



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