codelipenghui commented on issue #6052: [PIP-54] Support acknowledgment at batch index level URL: https://github.com/apache/pulsar/pull/6052#issuecomment-587468528 @zzzming Thanks for your comments. I have added an issue #6353 to track implementation for other language clients. I'm not familiar with C++. > I would suggest to add more documentation to explain the expected haviour and supported or non-supported consumer subscriptions; This feature has no restrictions on subscription types. > also the performance considerations like whether re-transmission of the entire batch of partially acked messages This is not introduced by this feature and we really need to do some tradeoffs. If users care about re-transmission of the entire batch, they can disable the batch message. But in my opinion, to disabling batch message could be worse. If the broker splits and sends batch messages, this will introduce more overhead on the broker.
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