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From: Tyler <pml@dtbb.net>
To: linux-ide@vger.kernel.org
Subject: Re: Playing with SATA NCQ
Date: Sun, 29 May 2005 07:24:14 -0700	[thread overview]
Message-ID: <4299D08E.2020706@dtbb.net> (raw)
In-Reply-To: <4299CD31.8020805@rtr.ca>

Mark Lord wrote:

> My basic hdparm timing test shouldn't show much of a difference
> with NCQ tests, becase hdparm just does a single request at a time,
> and waits for the results before issuing another.  Now, kernel read-ahead
> may result in some command overlap and a slight throughput increase, 
> but..
>
> Something like dbench and/or bonnie++ are more appropriate here.
>
> Cheers
> -
> To unsubscribe from this list: send the line "unsubscribe linux-ide" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>
How effective can NCQ be in a RAID5/RAID6 environment? If at all?

I wouldn't think it would be.. but maybe i'm not seeing the forest for 
the trees..

Regards,
Tyler.

  reply	other threads:[~2005-05-29 14:24 UTC|newest]

Thread overview: 68+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-05-26 14:00 Playing with SATA NCQ Jens Axboe
2005-05-26 16:25 ` Jeff Garzik
2005-05-26 17:07   ` Jens Axboe
2005-05-26 17:11     ` Jens Axboe
2005-05-26 17:15       ` Jeff Garzik
2005-05-26 17:33         ` Jens Axboe
2005-05-26 19:49     ` Jeff Garzik
2005-05-26 20:30       ` Jens Axboe
2005-05-27  7:20   ` Jens Axboe
2005-05-27  7:29     ` Jeff Garzik
2005-05-27  7:33       ` Jens Axboe
2005-05-27  7:51         ` Jeff Garzik
2005-05-27  8:00           ` Jens Axboe
2005-05-27  8:23             ` Jeff Garzik
2005-05-26 21:50 ` Mark Lord
2005-05-27  6:28   ` Jens Axboe
2005-05-27  6:58     ` Jeff Garzik
2005-05-27  7:15       ` Jens Axboe
2005-05-27  4:41 ` Jeff Garzik
2005-05-27  6:39   ` Jens Axboe
2005-05-27 21:40 ` Michael Thonke
2005-05-27 22:16   ` Jeff Garzik
2005-05-27 22:30     ` Michael Thonke
2005-05-28 12:12       ` Jens Axboe
2005-05-29 13:01         ` Michael Thonke
2005-05-29 14:09           ` Mark Lord
2005-05-29 14:24             ` Tyler [this message]
2005-05-29 15:22               ` Eric D. Mudama
2005-05-29 19:04             ` Jens Axboe
2005-05-29 19:05               ` Jeff Garzik
2005-05-29 19:21                 ` Jens Axboe
2005-05-29 19:03           ` Jens Axboe
2005-05-29 20:12             ` Michael Thonke
2005-05-29 20:17               ` Jeff Garzik
2005-05-30  6:05                 ` Jens Axboe
2005-05-30  6:07               ` Jens Axboe
2005-05-29 18:10         ` Michael Thonke
2005-05-29 19:06           ` Jens Axboe
2005-05-29 16:03 ` Erik Slagter
2005-05-29 16:34   ` Jeff Garzik
2005-05-29 16:50     ` Erik Slagter
2005-05-29 16:59       ` Jeff Garzik
2005-05-29 17:23         ` Erik Slagter
2005-05-29 17:29           ` Jeff Garzik
2005-05-29 17:45             ` Erik Slagter
2005-05-29 18:01               ` Jeff Garzik
2005-05-29 18:10                 ` Erik Slagter
2005-05-29 18:14                   ` Jeff Garzik
2005-05-29 18:27                 ` Michael Thonke
2005-05-29 18:31                   ` Jeff Garzik
2005-05-29 16:57   ` Michael Thonke
2005-05-29 17:26     ` Erik Slagter
2005-05-30  0:06       ` Mark Lord
2005-05-30  7:29         ` Erik Slagter
2005-05-30 18:09           ` Mark Lord
2005-05-30 18:22             ` Erik Slagter
2005-05-30 18:25               ` Mark Lord
2005-05-30 18:34                 ` Michael Thonke
2005-05-30 18:51                   ` Jeff Garzik
2005-05-30 18:48                 ` Jeff Garzik
2005-05-30 18:50               ` Jeff Garzik
2005-05-30 20:03                 ` Erik Slagter
2005-05-30 20:19                   ` Jeff Garzik
2005-05-31  7:44                     ` Erik Slagter
2005-05-30 23:14                 ` Mark Lord
2005-05-31  7:48                   ` Erik Slagter
2005-05-31  8:05                     ` Patrick McFarland
2005-05-29 21:49 ` Michael Thonke

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