From: "David Anderson" <david-anderson2003@mail.com>
To: linux-scsi@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Subject: I/O Request [Elevator; Clustering; Scatter-Gather]
Date: Tue, 04 Mar 2003 08:32:01 -0500 [thread overview]
Message-ID: <20030304133201.18619.qmail@mail.com> (raw)
Hi,
I have been going through some documentation that talks of clustering, scatter-gather and elevator being used to improve performance. I am confused between these :
This is what I have understood :
Elevator
The job of the elevator is to sort I/O requests to disk drives in such a way that the disk head moving in the same direction for maximum performance. Have been able to locate the code for the same.
Clustering
Combines multiple requests to adjecent blocks into a single request. Have not been able to find the code which carries this out. Any clue on where this is done in the linux source code ??
Do Clustering of request and scatter-gather mean the same ?? Confused to the core... Kindly help me ...
Thanks and Regards,
David Anderson
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next reply other threads:[~2003-03-04 13:32 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-04 13:32 David Anderson [this message]
2003-03-04 13:50 ` I/O Request [Elevator; Clustering; Scatter-Gather] Jens Axboe
2003-03-04 21:10 ` Daniel Phillips
2003-03-04 14:20 ` Jens Axboe
2003-03-04 17:47 ` Bryan Henderson
2003-03-04 18:04 ` Luben Tuikov
2003-03-04 14:14 ` Scott Merritt
-- strict thread matches above, loose matches on Subject: below --
2003-03-04 14:11 David Anderson
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