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Kafka >> mail # user >> Setting the consumer's offset


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Re: Setting the consumer's offset
I wrote some code
here<http://mail-archives.apache.org/mod_mbox/kafka-users/201303.mbox/%3CCAPD5FitPZkn7Uu+[EMAIL PROTECTED]%3E>that
resets the offset.  You just need to be sure to set this as the
consumer(s) is starting up.   I'm not certain if it is the "right way" to
do things.

http://mail-archives.apache.org/mod_mbox/kafka-users/201303.mbox/%3CCAPD5FitPZkn7Uu+[EMAIL PROTECTED]%3E
On Tue, Apr 2, 2013 at 12:46 AM, Jun Rao <[EMAIL PROTECTED]> wrote:

> Sean,
>
> A broker can have multiple topics, each with multiple partitions. Each
> partition can be consumed by multiple consumers.
>
> Our high level consumer API doesn't allow you to specify a starting offset.
> SimpleConsumer does. If you use SimpleConsumer, you are responsible for
> managing the consumption of all partitions. Consumer group is only used in
> the high level consumer.
>
> Thanks,
>
> Jun
>
> On Mon, Apr 1, 2013 at 7:10 PM, Sean Grayson <[EMAIL PROTECTED]> wrote:
>
> > Hello,
> >
> > Hopefully I'm sending this question to the right place. I'm currently
> > trying to set up a consumer that will allow me to specify the offset,
> > partition, and consumer group ID all at the same time. This obviously
> > causes a dilemma since neither the low-level or high-level consumer APIs
> > seem to support all three. So I have a couple questions:
> >
> > 1) Am I correct in my understanding that there is a 1-to-1 relationship
> > between brokers and partitions? Are multiple consumers per partition
> > supported? If not, I imagine I could just start up a simple consumer per
> > partition and that would give me what I want. If so, then do simple
> > consumers actually support consumer group IDs without my knowledge?
> >
> > 2) Is it possible to specify a custom offset for the high-level consumer
> > API other than from the tail (autooffset.reset = "smallest") or the head
> > (autooffset.reset = "largest")? I know that the offset for each consumer,
> > topic, and partition relationship is stored in a zookeeper ephemeral
> node.
> > Would connecting to zookeeper and changing all these offsets to the
> desired
> > values give me what I want? I have tried this with just one consumer
> using
> > the high-level api with one partition and one zookeeper host and it
> seemed
> > to work alright. But I'm wondering if changing these offsets would work
> > correctly and efficiently with multiple partitions and consumers with the
> > same ID, as well as multiple zookeeper hosts.
> >
> > Thanks,
> > Sean
> >
>

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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB