Jun Rao created KAFKA-1586:
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Summary: support sticky partitioning in the new producer
Key: KAFKA-1586
URL: https://issues.apache.org/jira/browse/KAFKA-1586
Project: Kafka
Issue Type: Bug
Components: core
Affects Versions: 0.8.2
Reporter: Jun Rao
If a message doesn't specify a key or a partition, the new producer selects a
partition for each message in a round-robin way. As a result, in a window of
linger.ms, messages are spread around in all partitions of a topic. Compared
with another strategy that assigns all messages to a single partition in the
same time window, this strategy may not compress the message set as well since
the batch is smaller. Another potential problem with this strategy is that the
compression ratio could be sensitive to the change of # partitions in a topic.
If # partitions are increased in a topic, the produced data may not be
compressed as well as before.
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