Re: Solaris Direct I/O

From: Christo Kutrovsky <>
Date: Fri, 12 Feb 2010 13:54:19 -0500
Message-ID: <>

Beware of bug with filesystemio_options=setall - DirectIO is NOT used there's a patch and bug number associated with that.

If you are using DirectIO reads/writes won't be recorded in vmstat. You can still see with iostat or you can download

Christo Kutrovsky
Senior Consultant
I blog at

On Tue, Feb 9, 2010 at 1:44 AM, Taral Desai <> wrote:

> Hi All,
> We are using sparc 64bit v 10 with oracle Above that we use SAN
> storage.
> 1. How to find if storage is mounted for direct or async io
> 2. We had set filesystem option to setall. How to verify it's doing direct
> or async. As with truss i see many kaio failure and then it invokes lwp
> process which do i/o in chunks. So, is there a different call for SAN.
> 3 Is there any benefit using veritas ODM over oracle ODM ?
-- Christo Kutrovsky Senior Consultant I blog at --
Received on Fri Feb 12 2010 - 12:54:19 CST

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