[jira] [Updated] (LUCENE-6119) Add AdaptiveRateLimitedDirectoryWrapper

["Michael McCandless (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-6119?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael McCandless updated LUCENE-6119:
---------------------------------------
    Summary: Add AdaptiveRateLimitedDirectoryWrapper  (was: Add IndexWriter.getTotalNewBytesWritten)

> Add AdaptiveRateLimitedDirectoryWrapper
> ---------------------------------------
>
>                 Key: LUCENE-6119
>                 URL: https://issues.apache.org/jira/browse/LUCENE-6119
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Michael McCandless
>            Assignee: Michael McCandless
>             Fix For: 5.0, Trunk
>
>         Attachments: LUCENE-6119.patch, LUCENE-6119.patch
>
>
> This method returns number of "incoming" bytes IW has written since it
> was opened, excluding merging.
> It tracks flushed segments, new commits (segments_N), incoming
> files/segments by addIndexes, newly written live docs / doc values
> updates files.
> It's an easy statistic for IW to track and should be useful to help
> applications more intelligently set defaults for IO throttling
> (RateLimiter).
> For example, an application that does hardly any indexing but finally
> triggered a large merge can afford to heavily throttle that large
> merge so it won't interfere with ongoing searches.
> But an application that's causing IW to write new bytes at 50 MB/sec
> must set a correspondingly higher IO throttling otherwise merges will
> clearly fall behind.



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