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Re: How large memory I needed to the zookeeper and kafka server? - Kafka - [mail # user]
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...Yes. Kafka doesn't use much in process memory, our 4GB is probably just because no one bothered to tune it. But memory given to the JVM takes away from the OS cache and will result in more d...
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Author: Jay Kreps,
2012-10-31, 15:40
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Re: CSV metrics - Kafka - [mail # dev]
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...I also get this exception over and over again. It's weird because I can manually create that file so it isn't a permissions issue. In any case the default path for metrics data like this sho...
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Author: Jay Kreps,
2012-10-30, 16:24
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CSV metrics - Kafka - [mail # dev]
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...We seem to have enabled this by default in 0.8. Since it is only useful for performance testing and inappropriate at other times this seems like a bug, no? -Jay...
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Author: Jay Kreps,
2012-10-30, 16:19
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Re: Transactional writing - Kafka - [mail # user]
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...Yeah that is a good question. I think we started with good throughput and scalability and are then adding in the features we can without breaking these things or over-complicating the design...
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Author: Jay Kreps,
2012-10-26, 18:47
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Re: Transactional writing - Kafka - [mail # user]
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...Yes, I don't think any single-hop request/response protocol can avoid this problem when performing general mutations on a remote system. This includes essentially all common usage of web ser...
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Author: Jay Kreps,
2012-10-26, 18:29
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Re: Transactional writing - Kafka - [mail # user]
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...There are a few oddities of using the batching feature to get a kind of transactionality (that wasn't the original intention): 1. It only actually works if you enable compression. Currently ...
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Author: Jay Kreps,
2012-10-26, 18:18
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Re: Transactional writing - Kafka - [mail # user]
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...This is an important feature and I am interested in helping out in the design and implementation, though I am working on 0.8 features for the next month so I may not be of too much use. I ha...
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Author: Jay Kreps,
2012-10-26, 18:08
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Re: end-to-end latency in kafka 0.8 - Kafka - [mail # dev]
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...Yes, this is single machine, I think that is the most directly comparable case to 0.7. It would be good to rerun with a replicated topic too. -Jay On Thu, Oct 25, 2012 at 5:44 PM...
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Author: Jay Kreps,
2012-10-26, 02:55
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[KAFKA-587] Refactor end-to-end latency test to work in system test framework - Kafka - [issue]
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...We have a somewhat half-hearted command line tool to test end-to-end latency (i.e. the time it takes to get a message from the producer to the consumer). core/src/test/other/kafka...
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http://issues.apache.org/jira/browse/KAFKA-587
Author: Jay Kreps,
2012-10-26, 00:38
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end-to-end latency in kafka 0.8 - Kafka - [mail # dev]
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...I ran the end-to-end latency test on 0.8 branch and it actually looks pretty good even with the remaining 0.8 perf bugs. I get an average 0.29 ms for the producer=>broker=>consumer rou...
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Author: Jay Kreps,
2012-10-26, 00:08
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