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https://issues.apache.org/jira/browse/KAFKA-3777?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Guozhang Wang updated KAFKA-3777:
---------------------------------
Description:
The LRU cache that is currently inside the RocksDbStore class. As part of
KAFKA-3776 it needs to come outside of RocksDbStore and be a separate component
used in:
1. KGroupedStream.aggregate() / reduce(),
2. KStream.aggregateByKey() / reduceByKey(),
3. KTable.to() (this will be done in KAFKA-3779).
As all of the above operators can have a cache on top to deduplicate the
materialized state store in RocksDB.
The scope of this JIRA is to extract out the cache of RocksDBStore, and keep
them as item 1) and 2) above; and it should be done together / after KAFKA-3780.
was:
The LRU cache that is currently inside the RocksDbStore class. As part of
KAFKA-3776 it needs to come outside of RocksDbStore and be a separate component
used in:
1. KGroupedStream.aggregate() / reduce(),
2. KStream.aggregateByKey() / reduceByKey(),
3. KTable.to() (this will be done in KAFKA-3779).
As all of the above operators can have a cache on top to deduplicate the
materialized state store in RocksDB.
The scope of this JIRA is to extract out the cache of RocksDBStore, and keep
them as item 1) and 2) above.
> Extract the LRU cache out of RocksDBStore
> -----------------------------------------
>
> Key: KAFKA-3777
> URL: https://issues.apache.org/jira/browse/KAFKA-3777
> Project: Kafka
> Issue Type: Sub-task
> Components: streams
> Affects Versions: 0.10.1.0
> Reporter: Eno Thereska
> Fix For: 0.10.1.0
>
>
> The LRU cache that is currently inside the RocksDbStore class. As part of
> KAFKA-3776 it needs to come outside of RocksDbStore and be a separate
> component used in:
> 1. KGroupedStream.aggregate() / reduce(),
> 2. KStream.aggregateByKey() / reduceByKey(),
> 3. KTable.to() (this will be done in KAFKA-3779).
> As all of the above operators can have a cache on top to deduplicate the
> materialized state store in RocksDB.
> The scope of this JIRA is to extract out the cache of RocksDBStore, and keep
> them as item 1) and 2) above; and it should be done together / after
> KAFKA-3780.
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