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https://issues.apache.org/jira/browse/LUCENE-5951?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Muir updated LUCENE-5951:
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Attachment: LUCENE-5951.patch
Try to improve the SSD detector more to make it safe to use for this purpose.
It was mostly a joke and really ... not good code. :)
* fix contract to throw IOException when incoming path does not exist. This is
important not to mask.
* for our internal heuristics, we could easily trigger SecurityException /
AIOOBE, we are doing things that are not guaranteed at all. So those are
important to mask.
* don't use Files.readAllBytes, that method is too dangerous in these
heuristics. Just read one byte.
We should improve the getDeviceName too, but its less critical.
> 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
>
>
> 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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