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From "Robert Muir (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-2791) WindowsDirectory
Date Fri, 03 Dec 2010 12:15:13 GMT

    [ 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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