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From: Allan Gottlieb <gottlieb@nyu.edu>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] new installation (ssd, new udev, grub2)
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Date: Sun, 12 Aug 2012 14:20:58 -0400
In-Reply-To: <CAEH5T2Nv+W-FHvzc2k+0LCZ3yEJvb0q+BO3RZ1LV7tqd_2K==g@mail.gmail.com>
	(Paul Hartman's message of "Fri, 10 Aug 2012 15:04:10 -0500")
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On Fri, Aug 10 2012, Paul Hartman wrote:

> On Fri, Aug 10, 2012 at 2:22 PM, Alan McKinnon <alan.mckinnon@gmail.com> wrote:
>> You also don't need an IO scheduler - ssd access is random like
>> RAM, no heads moving in and out so no sector ordering to worry about.
>> Configure the scheduler as NOOP in kernel config if all drives are ssd's
>
> I've read some contradictory reports about the best scheduler for SSD.
> Apparently some SSD controllers are tuned for sequential reads/writes
> (drives that lean heavily on compression, I would imagine?) and for
> those drives cfq or deadline may be the better choice. I would try
> them all and use whatever works best for your workload.

I see.  Thanks.
allan