[jira] [Commented] (KAFKA-3522) Consider adding version information into rocksDB storage format

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KAFKA-3522?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16834978#comment-16834978 ] 

ASF GitHub Bot commented on KAFKA-3522:
---------------------------------------

bbejeck commented on pull request #6661: KAFKA-3522: Interactive Queries must return timestamped stores
URL: https://github.com/apache/kafka/pull/6661
 
 
   
 
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> Consider adding version information into rocksDB storage format
> ---------------------------------------------------------------
>
>                 Key: KAFKA-3522
>                 URL: https://issues.apache.org/jira/browse/KAFKA-3522
>             Project: Kafka
>          Issue Type: Bug
>          Components: streams
>            Reporter: Guozhang Wang
>            Assignee: Matthias J. Sax
>            Priority: Major
>              Labels: architecture
>
> Kafka Streams does not introduce any modifications to the data format in the underlying Kafka protocol, but it does use RocksDB for persistent state storage, and currently its data format is fixed and hard-coded. We want to consider the evolution path in the future we we change the data format, and hence having some version info stored along with the storage file / directory would be useful.
> And this information could be even out of the storage file; for example, we can just use a small "version indicator" file in the rocksdb directory for this purposes. Thoughts? [~enothereska] [~jkreps]



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