>Raw devices don't do any bigger I/O's, this is merely the unit of
allocation used by the filesystem, not the unit of
>I/O to the disk drives. XFS will still allocate disk space in large
contiguous chunks.
They ALLOW bigger I/Os.
Raw devices aren't limited by the page size or the OS cache. That's the
whole purpose of the raw device. I could use them, but I don't want the
maintenance nightmare of 1 oracle DB file per device.
>Large block sizes I think helped Irix more than they would Linux.
Agreed.
*sigh* maybe I'll check out OCFS.
-Tony
------------------------------
Anthony J. Biacco
Systems/Network Administrator
Quris, Inc.
720-836-2015
-----Original Message-----
From: Steve Lord [mailto:lord@xxxxxxx]
Sent: Monday, July 19, 2004 8:09 PM
To: Anthony Biacco
Cc: linux-xfs@xxxxxxxxxxx
Subject: Re: mount: Function not implemented?
Anthony Biacco wrote:
> But it's a 64-bit system.
> How do people get oracle performing on enterprise class hardware, with
> linux, with such a low page size?
> Do you just have to say, the hell with it, and create a raw device?
>
Raw devices don't do any bigger I/O's, this is merely the unit of
allocation used by the filesystem, not the unit of I/O to the disk
drives. XFS will still allocate disk space in large contiguous chunks.
Large block sizes I think helped Irix more than they would Linux.
Steve
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