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https://issues.apache.org/jira/browse/KYLIN-5945?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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pengfei.zhan resolved KYLIN-5945.
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Resolution: Fixed
> metadata refactor
> -----------------
>
> Key: KYLIN-5945
> URL: https://issues.apache.org/jira/browse/KYLIN-5945
> Project: Kylin
> Issue Type: New Feature
> Components: Metadata
> Affects Versions: 5.0-alpha
> Reporter: pengfei.zhan
> Assignee: Zhiting Guo
> Priority: Major
> Fix For: 5.0.0
>
> Attachments: 1.PNG, 2.PNG, 3.png, 4.png, Metadata deep dive (en).pdf,
> metadata (3).pdf
>
>
> Kylin's metadata has some architectural issues, such as:
> 1. The metadata adopts a key-value structure. The JSON block contains a lot
> of content, which will grow with the growth of customer business, resulting
> in excessive network IO when updating metadata.
> 2. The design of epoch and project lock ensures that transactions within the
> project are executed serially, resulting in single-point bottlenecks and
> concurrency problems.
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