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https://issues.apache.org/jira/browse/LUCENE-3416?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13098286#comment-13098286
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Simon Willnauer commented on LUCENE-3416:
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I see, I guess that is kind of overkill here. This patch looks fine to me
though while I wonder why this needs to be synchronized since we don't read it
from a synced block. if you want this to take immediate effect you should
rather use volatile here? I doubt that this is necessary in this context - I'd
rather not invalidate a cache line for each IndexOutput creation.
> Allow to pass an instance of RateLimiter to FSDirectory allowing to rate
> limit merge IO across several directories / instances
> ------------------------------------------------------------------------------------------------------------------------------
>
> Key: LUCENE-3416
> URL: https://issues.apache.org/jira/browse/LUCENE-3416
> Project: Lucene - Java
> Issue Type: Improvement
> Components: core/store
> Reporter: Shay Banon
> Attachments: LUCENE-3416.patch
>
>
> This can come in handy when running several Lucene indices in the same VM,
> and wishing to rate limit merge across all of them.
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