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https://issues.apache.org/jira/browse/SPARK-32517?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17181641#comment-17181641
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Dongjoon Hyun commented on SPARK-32517:
---------------------------------------

BTW, this is not a bug in a new code because `StorageLevel.DISK_ONLY_3` 
succeeds in ARM cpu. In other words, this will be an existing ARM CPU bug in 
`with replication as stream` code path and it's exposed by the change from 
'local-cluster[2,1,1024]` to 'local-cluster[3,1,1024]`.
{code}
- caching on disk, replicated 3 (encryption = off)
- caching on disk, replicated 3 (encryption = off) (with replication as stream)
- caching on disk, replicated 3 (encryption = on)
- caching on disk, replicated 3 (encryption = on) (with replication as stream)
{code}

In this case, I'd like to recommend to file a new JIRA for that.

> Add StorageLevel.DISK_ONLY_3
> ----------------------------
>
>                 Key: SPARK-32517
>                 URL: https://issues.apache.org/jira/browse/SPARK-32517
>             Project: Spark
>          Issue Type: Improvement
>          Components: Spark Core
>    Affects Versions: 3.1.0
>            Reporter: Dongjoon Hyun
>            Assignee: Dongjoon Hyun
>            Priority: Major
>             Fix For: 3.1.0
>
>
> This issue aims to add `StorageLevel.DISK_ONLY_3` as a built-in StorageLevel.



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