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Posted to dev@lucene.apache.org by "Michael McCandless (JIRA)" <ji...@apache.org> on 2014/05/17 22:43:14 UTC
[jira] [Commented] (LUCENE-5678) Investigate to use
FileoutputStream instead of RandomAccessFile in FSIndexOutput
[ https://issues.apache.org/jira/browse/LUCENE-5678?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14000867#comment-14000867 ]
Michael McCandless commented on LUCENE-5678:
--------------------------------------------
I tested index time for full Wikipedia; it's output intensive, and it looks like no perf change w/ the patch, though the numbers are a little noisy from run to run ...
> Investigate to use FileoutputStream instead of RandomAccessFile in FSIndexOutput
> --------------------------------------------------------------------------------
>
> Key: LUCENE-5678
> URL: https://issues.apache.org/jira/browse/LUCENE-5678
> Project: Lucene - Core
> Issue Type: Bug
> Components: core/store
> Reporter: Uwe Schindler
> Assignee: Uwe Schindler
> Attachments: LUCENE-5678.patch
>
>
> We no longer allow seeking in IndexOutput, so there is no need to use RandomAccessFile. We can change this with a < 1 KiB patch.
> Further improvements would be to merge this with OutputStreamIndexOutput, so we get many simplifications.
> There is also no reason anymore to separate DataOutput from IndexOutput. The only additional thing is IndexOutput#getFilePointer(), which is handled by an internal counter (does not use getFilePointer of the underlying RAF) and checksums.
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