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Date: Fri, 3 Dec 2010 07:15:13 -0500 (EST)
From: "Robert Muir (JIRA)" <jira@apache.org>
To: dev@lucene.apache.org
Subject: [jira] Commented: (LUCENE-2791) WindowsDirectory
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    [ https://issues.apache.org/jira/browse/LUCENE-2791?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12966508#action_12966508 ] 

Robert Muir commented on LUCENE-2791:
-------------------------------------

bq. And Mike also said that we may create files by codecs with names that are non-ascii. And as you are the unicode policeman, I dont unterstand how you can live with default charsets... 

its my understanding that all indexfiles/codecs are ascii-only.

If this is going to change, then there is a lot of policework to do. Personally i would really prefer if we simply keep codecs and lucene filenames as ascii-only! 

For non-ascii filenames, java.io.File is broken, its equals() is inconsistent with its hashCode(), even on windows, and definitely on things like macos (as i think it still uses unicode normalization to normalize filenames). We should seriously avoid the system-dependent problems that will arise by using non-ascii filenames in these parts of lucene: i don't see this bringing a lot of benefits either.


> WindowsDirectory
> ----------------
>
>                 Key: LUCENE-2791
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2791
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: Store
>            Reporter: Robert Muir
>         Attachments: LUCENE-2791.patch, LUCENE-2791.patch, WindowsDirectory.dll, WindowsDirectory_amd64.dll
>
>
> We can use Windows' overlapped IO to do pread() and avoid the performance problems of SimpleFS/NIOFSDir.

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