Re: ASM versus Filesystems

From: Surachart Opun <>
Date: Mon, 8 Mar 2010 12:43:18 +0700
Message-ID: <>

ASM uses Direct I/O, Asynchronous I/O like raw device and no buffer like filesystem.
So, ASM make performance better than file system. If you're using RAC, you should use ASM.

ASM, you have to use rman to maintain and backup files. File System... it's easy, if you need to COLD backup database.

read many ASM idea at

Good Luck
Surachart Opun
Oracle ACE, OCE, OCP

On Sat, Mar 6, 2010 at 5:44 AM, patrick obrien <> wrote:

> Oracle Admins,
> I've been an AIX Admin for years, I'm a junior Oracle DBA and I apologize
> if the ASM Topic has come up lately. As an AIX Admin, using filesystems
> seems the best option for me.
> Reading up on Oracle's ASM technology, it looks like this could be a great
> option, primarily for performance reasons. Oracle would then own more real
> estate, so it can use its tools to better tune the entire system. Its almost
> too good to be true.
> But what are the caveats?
> AIX Filesystems offer me control on filesystems/directory sizes, increased
> performance and systems control. Filesystems are nice when managing backups
> too. With the advent of the NAS/SAN, maybe I can just hand it all over to
> Oracle.
> Any body not like ASM out there?
> Thank you,
> Patrick.

Received on Sun Mar 07 2010 - 23:43:18 CST

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