Jonathan Hodges 2013-06-13, 10:29
No. It only means that messages are written to all replicas in memory. Data
is flushed to disk asynchronously.
On Jun 13, 2013 3:29 AM, "Jonathan Hodges" <[EMAIL PROTECTED]> wrote:
> Looking at Jun’s ApacheCon slides (
> http://www.slideshare.net/junrao/kafka-replication-apachecon2013) slide 21
> titled, ‘Data Flow in Replication’ there are three possible durability
> configurations which tradeoff latency for greater persistence guarantees.
> The third row is the ‘no data loss’ configuration option where the producer
> only receives an ack from the broker once the message(s) are committed by
> the leader and peers. Does this commit also mean the message(s) are
> flushed to disk? I know there is a separate configuration setting,
> log.flush.interval.messages, but I thought in sync mode the producer
> doesn’t receive an ack until message(s) are committed and flushed to disk.
> Please correct me if my understanding is incorrect.
Jonathan Hodges 2013-06-13, 14:36