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Posted to issues-all@impala.apache.org by "Wenzhe Zhou (Jira)" <ji...@apache.org> on 2023/06/01 00:32:00 UTC

[jira] [Updated] (IMPALA-12150) Use protocol version to isolate cluster components

     [ https://issues.apache.org/jira/browse/IMPALA-12150?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wenzhe Zhou updated IMPALA-12150:
---------------------------------
    Summary: Use protocol version to isolate cluster components  (was: Allow executors to register to two statestores)

> Use protocol version to isolate cluster components
> --------------------------------------------------
>
>                 Key: IMPALA-12150
>                 URL: https://issues.apache.org/jira/browse/IMPALA-12150
>             Project: IMPALA
>          Issue Type: Improvement
>          Components: Backend
>            Reporter: Wenzhe Zhou
>            Assignee: Wenzhe Zhou
>            Priority: Major
>
> Impala assume single statestore instance in an Impala cluster and each statestore subscriber can register to only one statestore instance. Since cluster membership is maintained by statestore, each executor and coordinator can join only one cluster. 
> For rolling upgrade with zero downtime, we need create two clusters - blue/green clusters. Each cluster with its own statestore and catalogd. To avoid cluster size reduction during rolling upgrade,  we should allow the upgraded executors to join two clusters.



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