Matthias J. Sax created KAFKA-6998:
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Summary: Remove caching wrapper stores if cache-size is configured
to zero bytes
Key: KAFKA-6998
URL: https://issues.apache.org/jira/browse/KAFKA-6998
Project: Kafka
Issue Type: Improvement
Components: streams
Reporter: Matthias J. Sax
Users can disable caching globally by setting the cache size to zero in their
config. However, this does only effectively disable the caching layer, but the
code is still in place.
We should consider to remove the caching wrappers completely for this case. The
tricky part is, that we insert the caching layer at compile time, ie, when
calling `StreamsBuilder#build()` – at this point, we don't know the
configuration yet. Thus, we need to find a way to rewrite the topology after it
is passed to `KafkaStreams` if case caching size is set to zero.
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