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Posted to dev@rocketmq.apache.org by GitBox <gi...@apache.org> on 2022/08/14 08:01:17 UTC

[GitHub] [rocketmq-client-cpp] T1anZhenYu opened a new issue, #438: How to set write queue number and read queue number?

T1anZhenYu opened a new issue, #438:
URL: https://github.com/apache/rocketmq-client-cpp/issues/438

   
   
   I want the producer to specify the read/write queue number when it sends a message about a new topic. But in Example, there is no relevant use case. How should I set it?
   


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[GitHub] [rocketmq-client-cpp] T1anZhenYu commented on issue #438: How to set write queue number and read queue number?

Posted by GitBox <gi...@apache.org>.
T1anZhenYu commented on issue #438:
URL: https://github.com/apache/rocketmq-client-cpp/issues/438#issuecomment-1214577353

   Thanks. I will check it out .


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[GitHub] [rocketmq-client-cpp] T1anZhenYu commented on issue #438: How to set write queue number and read queue number?

Posted by GitBox <gi...@apache.org>.
T1anZhenYu commented on issue #438:
URL: https://github.com/apache/rocketmq-client-cpp/issues/438#issuecomment-1214563752

   > 
   
   When I create a new consumer, I only want a subset of available queues. How can I set it?


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[GitHub] [rocketmq-client-cpp] lizhanhui commented on issue #438: How to set write queue number and read queue number?

Posted by GitBox <gi...@apache.org>.
lizhanhui commented on issue #438:
URL: https://github.com/apache/rocketmq-client-cpp/issues/438#issuecomment-1214557395

   The number of queues/partitions of a topic is decided and persisted on topic creation.  Is your use case to use only a subset of available queues or change the number of the queues a topic has dynamically?


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[GitHub] [rocketmq-client-cpp] lizhanhui commented on issue #438: How to set write queue number and read queue number?

Posted by GitBox <gi...@apache.org>.
lizhanhui commented on issue #438:
URL: https://github.com/apache/rocketmq-client-cpp/issues/438#issuecomment-1214571231

   > When I create a new consumer, I only want a subset of available queues. How can I set it?
   
   I assume you are referring to Producer as the first comment.  Yes, you can decide which queue to publish to when delivering a message. Use the one with QueueSelector 
   ```cpp
     virtual SendResult send(MQMessage& msg, MessageQueueSelector* selector, void* arg);
   ```


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