RE: Negative message latency

2016-07-27 Thread Luo, Chao
Hi Dave, When I tested Kafka, I also observed negative latency sometimes. I guess it is because the slight clock difference between producers and consumers. Btw, what is your typical producer-to-consumer latency? My system has an average of 250 milliseconds. I cannot reduce it anymore. Best,

kafka latency

2016-07-26 Thread Luo, Chao
Dear Kafka guys, I measured the latency of kafka system. The producer, kafka servers, and consumer were running on different machines (AWS EC2 instances). The producer-to-consumer latency is around 250 milliseconds. Is it a normal value for kafka system. Can I do better and how? Any comments

RE: Kafka Fault Tolerance Test

2016-07-18 Thread Luo, Chao
@kafka.apache.org Subject: Re: Kafka Fault Tolerance Test This is un-expected. Any error logs / exceptions did you see from the clients when they can no longer send / fetch from brokers? Guozhang On Mon, Jul 18, 2016 at 8:59 AM, Luo, Chao <chao@here.com> wrote: > Dear Kafka fans, &

Kafka Fault Tolerance Test

2016-07-18 Thread Luo, Chao
Dear Kafka fans, I have a concern of testing Kafka fault tolerance. Or may I did not configure it right. I have two kafka servers and one zookeeper, which are running on three different AWS EC2 instances. I created a topic with one partition and two replica. First, the two kafka servers were

RE: Role of Producer

2016-07-13 Thread Luo, Chao
it to Kafka Topics, using Kafka Producer at the end. Thanks, Snehal On 13 July 2016 at 13:31, Luo, Chao <chao@here.com> wrote: > Dear Kafka guys, > > I just started to build up a Kafka system two weeks ago. Here I have a > question about how to design/implement the p

RE: Role of Producer

2016-07-13 Thread Luo, Chao
@kafka.apache.org Subject: Re: Role of Producer Could you write them a client that uses the Kafka producer? You could also write some restful services that send the data to kafka. If they use MQ you could listen to MQ and send to Kafka. On Wed, Jul 13, 2016 at 9:31 PM, Luo, Chao <chao@here.

Role of Producer

2016-07-13 Thread Luo, Chao
Dear Kafka guys, I just started to build up a Kafka system two weeks ago. Here I have a question about how to design/implement the producer. In my system, there are many data providers. I need to collect real-time data from them and store it in a NoSQL database. The problem is that different