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Uwe Schindler commented on LUCENE-5951: --------------------------------------- Hi Mike, I am OK with that. I would only add one other addition: "For all other operating systems it currently assumes a rotational disk for backwards compatibility." Another idea: we should maybe add special convenience setter to set optimal settings. By that, you don't rely on the auto detection and still can set "automatic" settings for both types of drives: - {{setMaxMergesAndThreads(int maxMergeCount, int maxThreadCount)}} (expert) - {{setDefaultMergesAndThreads(boolean optimizeForNonRotational)}} (convenience) Uwe > 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 ... -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org