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Kafka >> mail # user >> Broker to consumer compression

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Re: Broker to consumer compression
That is not available for performance reasons. Broker uses zero-copy
to transfer data from disk to the network on the consumer side. If we
post process data already written to disk before sending it to
consumer, we will lose the performance advantage that we have due to
zero copy.


On Fri, Apr 12, 2013 at 12:59 PM, Pablo Barrera González
> Thanks for the replay Neha, but that's is end-to-end and I am looking
> for a broker-consumer compression.
> So:
> Producer -> uncompressed -> broker -> compressed -> consumer
> Regards
> Pablo
> 2013/4/12 Neha Narkhede <[EMAIL PROTECTED]>:
>> Kafka already supports end-to-end compression which means data
>> transfer between brokers and consumers is compressed. There are two
>> supported compression codecs - GZIP and Snappy. The latter is lighter
>> on CPU consumption. See this blog post for comparison -
>> http://geekmantra.wordpress.com/2013/03/28/compression-in-kafka-gzip-or-snappy/
>> Thanks,
>> Neha
>> On Fri, Apr 12, 2013 at 10:56 AM, Pablo Barrera González
>> <[EMAIL PROTECTED]> wrote:
>>> Hi
>>> Is it possible to enable compression between the broker and the consumer?
>>> We are thinking in develop this feature in kafka 0.7 but first I would
>>> like to check if there is something out there.
>>> Our escenario is like this:
>>> - the producer is a CPU bounded machine, so we want to keep the CPU
>>> consumption as low as possible, so we can't enable compression here
>>> - the consumers can fetch data from the same data center (no
>>> compression needed) or from a remote data center
>>> - intersite bandwidth is limited so compression would be interesting
>>> Our approach is to add compress the connection at kafka level between
>>> broker and consumer, inside kafka, so the final user can read plain
>>> data.
>>> Regards
>>> Pablo