In the old protocol description the -1 and -2 values are explicitly
mentioned.
https://cwiki.apache.org/confluence/display/KAFKA/Wire+Format
It looks like it had been left out of the new 0.8 docs, however I just
added it.
https://cwiki.apache.org/confluence/display/KAFKA/A+Guide+To+The+Kafka+Protocol#AGuideToTheKafkaProtocol-OffsetAPI
Hopefully the docs are more helpful now. Feel free to ask for further
clarifications.
On 02/21/2013 05:04 AM, David Arthur wrote:
Yes, I think that section of the protocol guide could be improved.
Specifically, it would be useful to explain what the " Time" and
"MaxNumberOfOffsets" parameters are used for, as well documenting these
two magic numbers (-1 and -2).
-David
On 2/21/13 12:13 AM, Neha Narkhede wrote:
David,
The API that you are looking for is OffsetRequest. If you pass in -2 as the
value for Time, it will get you the earliest offset available for that
partition. If you pass in -1, it will get you the latest offset.
You can find more information about the OffsetRequest and OffsetResponse
APIs here -
https://cwiki.apache.org/confluence/display/KAFKA/A+Guide+To+The+Kafka+Protocol#AGuideToTheKafkaProtocol-OffsetAPI
Please let us know if that description can be improved.
Thanks,
Neha
On Wed, Feb 20, 2013 at 6:31 PM, David Arthur <mum...@gmail.com> wrote:
Is there currently a way to get the latest offset (or close to the latest)
for a partition? Is this covered by the Offset API, and if so could someone
explain this API a bit?
I'd like to write a consumer that can start from 0 (like unix cat) or
start from the most recent (like unix tail).
Thanks!
-David
--
*Colin Blower*
/Software Engineer/
Barracuda Networks Inc.
+1 408-342-5576 (o)
