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https://issues.apache.org/jira/browse/LUCENE-5951?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14250241#comment-14250241
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Robert Muir commented on LUCENE-5951:
-------------------------------------

I dont think we should make things complicated for app developers. We are not 
writing a generic spins() method for developers, its a lucene.internal method 
for good defaults.

> Detect when index is on SSD and set dynamic defaults
> ----------------------------------------------------
>
>                 Key: LUCENE-5951
>                 URL: https://issues.apache.org/jira/browse/LUCENE-5951
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Michael McCandless
>            Assignee: Michael McCandless
>         Attachments: LUCENE-5951.patch, LUCENE-5951.patch, LUCENE-5951.patch
>
>
> E.g. ConcurrentMergeScheduler should default maxMergeThreads to 3 if it's on 
> SSD and 1 if it's on spinning disks.
> I think the new NIO2 APIs can let us figure out which device we are mounted 
> on, and from there maybe we can do os-specific stuff e.g. look at  
> /sys/block/dev/queue/rotational to see if it's spinning storage or not ...



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