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Michael McCandless commented on LUCENE-5951: -------------------------------------------- [~thetaphi] how about this disclaimer in CMS's top javadocs? {noformat} * <p>This class attempts to detect whether the index is * on rotational storage (traditional hard drive) or not * (e.g. solid-state disk) and changes the default max merge * and thread count accordingly. This detection is currently * Linux-only, and relies on the OS to put the right value * into /sys/block/<dev>/block/rotational.</p> {noformat} > 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