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https://issues.apache.org/jira/browse/KAFKA-2594?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14961401#comment-14961401
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ASF GitHub Bot commented on KAFKA-2594:
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Github user asfgit closed the pull request at:
https://github.com/apache/kafka/pull/256
> Add a key-value store that is a fixed-capacity in-memory LRU cache
> -------------------------------------------------------------------
>
> Key: KAFKA-2594
> URL: https://issues.apache.org/jira/browse/KAFKA-2594
> Project: Kafka
> Issue Type: Sub-task
> Components: kafka streams
> Reporter: Randall Hauch
> Assignee: Randall Hauch
> Fix For: 0.9.0.0
>
>
> The current {{KeyValueStore}} implementations are not limited in size, and
> thus are less useful for some use cases. This subtask will add a simple
> key-value store that maintains in memory at most a maximum number of entries
> that were recently read or written. When the cache size reaches the capacity
> and a new entry is to be added, the least recently used entry will be
> automatically purged from the cache. This key-value store will extend
> {{MeteredKeyValueStore}} for monitoring and recording of changes to a backing
> topic, enabling recovery of the cache contents from the replicated state.
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