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https://issues.apache.org/jira/browse/LUCENE-8833?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16857525#comment-16857525
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Simon Willnauer commented on LUCENE-8833:
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> what would the iocontext provide to base the preload decision on? just
> curious.
sure, the one I had in mind as an example is merge. I am not sure if it makes a
big difference I was just thinking if there are other signals than the file
extension.
I opened LUCENE-8835 to fix the file listing issue FileSwitchDirectory has.
> 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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