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[KAFKA-77] Implement "group commit" for kafka logs - Kafka - [issue]
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...The most expensive operation for the server is usually going to be the fsync() call to sync data in a log to disk, if you don't flush your data is at greater risk of being lost in a cras...
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http://issues.apache.org/jira/browse/KAFKA-77
Author: Jay Kreps,
2012-10-22, 04:19
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[KAFKA-543] Metadata request from DefaultEventHandler.handle repeats same topic over and over - Kafka - [issue]
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...It looks like we are calling BrokerPartitionInfo.updateInfo() with a list of the same topic repeated many times:Here is the line:Utils.swallowError(brokerPartitionInfo.updateInfo(outstanding...
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http://issues.apache.org/jira/browse/KAFKA-543
Author: Jay Kreps,
2012-10-16, 05:29
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[KAFKA-569] Cleanup kafka.utils.Utils - Kafka - [issue]
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...kafka.utils.Utils is a real mess. It is full of odd little pieces of business logic dropped there. We should clean this up....
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http://issues.apache.org/jira/browse/KAFKA-569
Author: Jay Kreps,
2012-10-13, 17:36
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[KAFKA-506] Store logical offset in log - Kafka - [issue]
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...Currently we only support retention by dropping entire segment files. A more nuanced retention policy would allow dropping individual messages from a segment file by recopying it. This is no...
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http://issues.apache.org/jira/browse/KAFKA-506
Author: Jay Kreps,
2012-10-12, 01:16
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Re: Number of consumers limited to number of partitions - Kafka - [mail # user]
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...Yes, the reason for this is that if two consumers consumed the same partition internally we would have to keep track of per-message consumption (which is expensive) and the ordering guarante...
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Author: Jay Kreps,
2012-10-11, 15:41
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Re: Zookeeper freezes - Kafka - [mail # user]
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...Are you logging GC activity on the zk jvm? We had a lot of zk gc problems before we got more scientific about our jvm settings (I think we added some notes on the operations page). -Ja...
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Author: Jay Kreps,
2012-10-11, 15:39
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Re: implications of using large number of topics.... - Kafka - [mail # user]
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...Yes the footprint of a topic is one directory per partition (a topic can have many subpartitions per partitions). Each directory contains one or more files (depending on how much data you ar...
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Author: Jay Kreps,
2012-10-10, 23:25
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Re: Kafka's agent sit on localhost to forward message to broker? - Kafka - [mail # user]
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...Yes, perhaps the existing console consumer could be modified to do this? -Jay On Tue, Oct 9, 2012 at 10:05 PM, howard chen wrote: ...
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Author: Jay Kreps,
2012-10-10, 15:23
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[KAFKA-555] Add a key-based log retention strategy - Kafka - [issue]
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...Currently we have two log retention strategies: one based on time and one based on log size. These work well for "event" type data--i.e. data that consists only of appends. However...
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http://issues.apache.org/jira/browse/KAFKA-555
Author: Jay Kreps,
2012-10-09, 17:09
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[KAFKA-512] Remove checksum from ByteBufferMessageSet.iterator - Kafka - [issue]
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...Messages are explicitly checksumed in Log.append. But there is also a checksum computed and checked automatically in ByteBufferMessageSet.iterator as we iterate. This iterator is used quite ...
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http://issues.apache.org/jira/browse/KAFKA-512
Author: Jay Kreps,
2012-10-09, 16:44
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