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Posted to issues@tez.apache.org by "David Mollitor (Jira)" <ji...@apache.org> on 2021/02/08 14:16:00 UTC

[jira] [Comment Edited] (TEZ-4275) Use Google Guava Intern Facility

    [ https://issues.apache.org/jira/browse/TEZ-4275?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17281085#comment-17281085 ] 

David Mollitor edited comment on TEZ-4275 at 2/8/21, 2:15 PM:
--------------------------------------------------------------

[~jeagles] This particular feature has been around since the dawn of time: Guava 3.0

https://guava.dev/releases/16.0.1/api/docs/com/google/common/collect/Interners.html

So there is less risk here of backwards incompatibility. 


was (Author: belugabehr):
[~jeagles] This particular feature has been around since the dawn of time: Guava 3.0

https://guava.dev/releases/16.0.1/api/docs/com/google/common/collect/Interners.html

So there is less risk here of backwards compatibility. 

> Use Google Guava Intern Facility
> --------------------------------
>
>                 Key: TEZ-4275
>                 URL: https://issues.apache.org/jira/browse/TEZ-4275
>             Project: Apache Tez
>          Issue Type: Improvement
>            Reporter: David Mollitor
>            Assignee: David Mollitor
>            Priority: Major
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> Google Guava has a pretty cool Interner facility.
>  
>  * More memory efficient than current offering.  Map contains a weak key and a static dummy value (current implementation uses a weak value)
>  * Current implementation has a single lock around the entire data structure.  Google segments their data structure into (default: 4) segments for better concurrency
>  * All the other thoughtful stuff Google has added into this feature



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