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https://issues.apache.org/jira/browse/LUCENE-8833?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16856997#comment-16856997
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Robert Muir commented on LUCENE-8833:
-------------------------------------

what would the iocontext provide to base the preload decision on? just curious.

> Allow subclasses of MMapDirecory to preload individual IndexInputs
> ------------------------------------------------------------------
>
>                 Key: LUCENE-8833
>                 URL: https://issues.apache.org/jira/browse/LUCENE-8833
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Simon Willnauer
>            Priority: Major
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> I think it's useful for subclasses to select the preload flag on a per index 
> input basis rather than all or nothing. Here is a patch that has an 
> overloaded protected openInput method. 



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