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From: Michael Monnerie <michael.monnerie@is.it-management.at>
Subject: Re: XFS journaling position
Date: Thu, 28 Oct 2010 11:44:38 +0200
References: <31c7e56286d37870011c17ee8e002760.squirrel@webmail.ics.forth.gr>
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Cc: Robert Brockway <robert@timetraveller.org>

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On Mittwoch, 27. Oktober 2010 Robert Brockway wrote:
> Similarly virtual hosts have little chance of trying to establish
> the  physical nature of the device holding their filesystems.

Yes, performance optimizations will be fun in the near future. VMs, thin=20
provisioning, NetApps WAFL, LVM, funny disk layouts, all can do things=20
completely different than our "old school" thinking. I wonder when=20
there's gonna be an I/O scheduler that just elevates the I/O from a VM=20
to the real host, so that the host itself can optimize and align. After=20
all, a VM has no idea of the storage. That's why already now you can=20
choose "noop" as the scheduler in a VM. I guess there will be a=20
"virtualized" scheduler once, but we will see.

=2D-=20
mit freundlichen Gr=FCssen,
Michael Monnerie, Ing. BSc

it-management Internet Services
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