Home | About | Sematext search-lucene.com search-hadoop.com
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
 Search Hadoop and all its subprojects:

Switch to Threaded View
Kafka >> mail # user >> Message latency


Copy link to this message
-
Re: Message latency
That is correct if your producer ack > 1.

Guozhang
On Tue, Feb 4, 2014 at 11:57 AM, Michael Popov <[EMAIL PROTECTED]> wrote:

> Hi,
>
> I am trying to understand what influences message latency in Kafka.
>
> According to the Kafka Replication Design document (
> https://linkedin.jira.com/secure/attachment/10050/kafka_replication_highlevel_design.pdf
> ):
>
> 1.       Writes: Once the leader receives the acknowledgment from all
> replicas in ISR, the message is committed. The leader advances the HW and
> sends an acknowledgment to the client (page 4)
>
> 2.       Reads: Only messages up to the HW are exposed to the reader (page
> 5)
>
> It means message latency depends on how fast followers pulled data from
> the leader and reported successful data writes.
> Is this correct?
>
> Thank you,
> Michael Popov
>
>
--
-- Guozhang

 
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