From: "Daniel Blueman" <daniel.blueman@gmx.net>
To: linux-kernel@vger.kernel.org
Subject: Re: File system performance, hardware performance, ext3, 3ware RAID1, etc.
Date: Fri, 13 Feb 2004 15:44:13 +0100 (MET) [thread overview]
Message-ID: <17899.1076683453@www11.gmx.net> (raw)
In-Reply-To: 20040213142719.GA28100@mail.shareable.org
It is a small loss that the TCQ-support implementation hasn't been stable on
linux so far. I guess mostly due to the great I/O scheduling Linux has (ie
anticipatory scheduler).
Yes, a growing number of IDE disk manufacturers are using native S-ATA
controllers in their disks, and TCQ is one of the core features (ie unique selling
point), as well as being implemented on the more lavish P-ATA controllers.
It's just a shame that there are still issues saturating a bunch of IDE
disks with software RAID in the 2.6 series, but I guess that'll be ironed out in
time...
> Daniel Blueman wrote:
> > many modern IDE disks and
> > controllers also have tagged command queuing, so it is even more of a
> corner case.
>
> Linux doesn't use tagged command queueing, though - the code has been
> disabled for some time. I thought the TCQ stuff was disabled because
> only very few disks supported it and the code wasn't reliable.
>
> Yet you say many modern disks support it?
>
> -- Jamie
>
--
Daniel J Blueman
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next prev parent reply other threads:[~2004-02-13 14:44 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-13 12:23 File system performance, hardware performance, ext3, 3ware RAID1, etc Daniel Blueman
2004-02-13 14:27 ` Jamie Lokier
2004-02-13 14:44 ` Daniel Blueman [this message]
2004-02-13 16:15 ` Bartlomiej Zolnierkiewicz
2004-02-13 22:56 ` Timothy Miller
-- strict thread matches above, loose matches on Subject: below --
2004-02-14 18:16 Walt H
2004-02-16 17:53 ` Timothy Miller
2004-02-12 23:32 Timothy Miller
2004-02-13 5:53 ` Willy Tarreau
2004-02-13 19:19 ` Timothy Miller
2004-02-13 22:39 ` Willy Tarreau
2004-02-13 23:14 ` Timothy Miller
2004-02-13 19:30 ` Eric D. Mudama
2004-02-13 19:55 ` Linus Torvalds
2004-02-13 20:44 ` John Bradford
2004-02-13 22:45 ` Willy Tarreau
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