On Fri, Oct 06, 2017 at 11:18:39AM -0500, Eric Sandeen wrote: > On 10/6/17 10:38 AM, Darrick J. Wong wrote: > > On Fri, Oct 06, 2017 at 10:46:20AM +0200, Gandalf Corvotempesta wrote: > > Semirelated question: for a solid state disk on a machine with high CPU > > counts do we prefer agcount == cpucount to take advantage of the > > high(er) iops and lack of seek time to increase parallelism? > > > > (Not that I've studied that in depth.) > > Interesting question. :) Maybe harder to answer for SSD black boxes? Easy: switch to multidisk mode if /sys/block/<dev>/queue/rotational is zero after doing all the other checks. Then SSDs will get larger AG counts automatically. Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
