Re: Trying to get ASM disks under asmlib rather than system

From: Don Seiler <>
Date: Wed, 2 Apr 2008 07:41:37 -0500
Message-ID: <>

hey Frits, your blog came up many times in my googling last night ;) See replies inline below.

On Wed, Apr 2, 2008 at 3:51 AM, Frits Hoogland <> wrote:

> btw, any reason you want asmlib disks?

The only "reason" (if you can call it that) is that Oracle seems to push it so hard for linux. However we do have a whitepaper from Symantec on setting up Veritas and ASM without asmlib, so we'll probably go that route when we get a chance to redo it all.

> asmlib disks mean you have a kernel dependency.
> I have investigated the technical reasons for using it, and the only reason
> I can find for using asmlib disks so far is asmlib is claimed (by oracle) to
> use lesser system resources, the slab kernel resources for using aio
> (writing to asmlib meta devices is done synchronous (see the next blog about
> this), the kernel module writes asynchronous.

Yes those same claims are the siren song that lured me to asmlib. As I said, we'll probably try a setup without asmlib when we get a chance in a few weeks. I just wondering (hoping?) that there might be a fix for my foul-up.

Don Seiler
Received on Wed Apr 02 2008 - 07:41:37 CDT

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