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https://issues.apache.org/jira/browse/LUCENE-5951?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14251878#comment-14251878
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Uwe Schindler commented on LUCENE-5951:
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Sorry Robert, it is my personal decision to comment on this. It was not a
complaint, just a notice, so anybody who wants to lookup more on this issue, to
get the relevant information.
My problem was just that some user with a misconfigured system could get
sudenly the SSD optimization on a spinning disk and then his IO system gives up
:-) So it should be documented and I just ask for some hints in the
documentation, that one should take care to configure his virtual machines
correctly.
I DON'T COMPLAIN! But now I complain: Why are you attacking me? I just bring in
here useful items that might help others.
> 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,
> 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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