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From Jun Rao <...@confluent.io>
Subject Re: [VOTE] KIP-98: Exactly Once Delivery and Transactional Messaging
Date Mon, 13 Feb 2017 21:21:03 GMT
Hi, Guozhang,

Thanks for the proposal. I made a pass of the wiki and had the following
comments.

200. Message format:
200.1 MaxTimestampDelta: Does that need to be delta since it's always a
fixed size in64?
200.2 The wiki says "At the end we still maintains a message-level CRC". Is
that still valid?
200.3 In the ProducerRequest, do we need messageSet size?
200.4 One of the things that we may want to add in the future is KIP-82
(per record header). It would be useful to think a bit how easy it is to
support that with the new message format.


201. Configurations:
201.1 transaction.timeout.ms in the producer: It seems that it's missing in
BeginTxnRequest? Also, what happens when the value is larger than
max.transaction.timeout.ms on the broker?
201.2 For the internal transactional topic, do we need additional broker
side configurations to control # of partitions, # of replicas, compression
codec, segment size like the offset topic?
201.3 isolation.level: It says the default is "all", but there is no option
for "all".

Thanks,

Jun

On Wed, Feb 1, 2017 at 8:13 PM, Guozhang Wang <wangguoz@gmail.com> wrote:

> Hi all,
>
> We would like to start the voting process for KIP-98. The KIP can be found
> at
>
> https://cwiki.apache.org/confluence/display/KAFKA/KIP-
> 98+-+Exactly+Once+Delivery+and+Transactional+Messaging
>
> Discussion thread can be found here:
>
> http://search-hadoop.com/m/Kafka/uyzND1jwZrr7HRHf?subj=+
> DISCUSS+KIP+98+Exactly+Once+Delivery+and+Transactional+Messaging
>
> Thanks,
>
> --
> -- Guozhang
>

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