I haven't done this myself, so use at your own risk, but from the archlinux
wiki, there's an example of using udev to set one scheduler for non-rotational
disks and another for rotational, which sounds like a good general solution for
what you're looking for here:
From: xfs-bounces@xxxxxxxxxxx [mailto:xfs-bounces@xxxxxxxxxxx] On Behalf Of
Sent: Monday, March 17, 2014 12:26 PM
Subject: Re: elevator question
Am 2014-03-17 16:39, schrieb Grozdan:
> On Mon, Mar 17, 2014 at 4:35 PM, Marko Weber|8000 <weber@xxxxxxxxxx>
>> hello list,
>> in the xfs faq i read elevator=noop is best when using ssd.
>> i have the gentoo system on a ssd, but the larger data storage
>> partition on softraid with some sata disks.
>> is elevator=noop in this combo still best?
>> thx for any cunstructive answer
> noop and deadline are best for SSDs. deadline is best for spinning
> disks with XFS, especially in RAID. Stay away from CFQ as it kills
> parallelism in XFS
but what, if i have mixed setup in a server ssd + sata ??
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