If you want to use raw make sure manage them with LVM!
Thanks
--
LSC
On 7/5/07, Kerber, Andrew W. <Andrew.Kerber_at_umb.com> wrote:
>
> I agree with you. Any performance you may think you gain by use of raw
> devices is hard to measure, and offset by the additional administrative
> problems associated with raw devices. However, I just want to have a better
> idea of how they need to be set up and managed, at the very least so I can
> argue the merits with the Unix types.
>
>
>
> -----Original Message-----
> *From:* Dan Norris [mailto:dannorris_at_dannorris.com]
> *Sent:* Thursday, July 05, 2007 8:37 AM
> *To:* Kerber, Andrew W.; oracle.rdbms_at_gmail.com; ORACLE-L
> *Subject:* Re: raw device
>
>
>
> I have yet to find a situation where RAW was that compelling that I'd use
> it instead of a cooked filesystem. I think that part of the reason you don't
> find a lot of documentation about it is because not that much exists. IMHO,
> that's because of supply and demand--that is, there's little demand for such
> a thing because there isn't much use of RAW devices these days, at least in
> Oracle environments. RAW devices are more common in Sybase environments from
> what I've seen.
>
> In short, my advice for managing RAW devices is to use them to create a
> filesystem on and then mount that :).
>
> Just for curiousity, I searched ML for "raw devices performance" and found
> some interesting items:
> 29676.1: Making the decision to use raw devices (an article by Cary
> Millsap from 1992)
> 236679.1: Comparing performance between RAW IO vs OCFS vs ext2/3
>
> These are both a little dated, but interesting anyway.
>
> Dan
>
> ----- Original Message ----
> From: "Kerber, Andrew W." <Andrew.Kerber_at_umb.com>
> To: oracle.rdbms_at_gmail.com; ORACLE-L <oracle-l_at_freelists.org>
> Sent: Thursday, July 5, 2007 8:12:43 AM
> Subject: RE: raw device
>
> I am also looking for some good device on raw device administration, both
> in Oracle and and outside of Oracle.
>
>
>
> Having come up on the Oracle developer side of the DBA business, I have
> been looking for some good documentation on Raw device administration in
> general. I have used raw devices in the past, but I have always just let
> the Unix admin hand us the slices, and we set up softlinks to them as we
> need. I think its time I learned a little more about how to set them up.
>
>
>
> -----Original Message-----
> *From:* oracle-l-bounce_at_freelists.org [mailto:
> oracle-l-bounce_at_freelists.org] *On Behalf Of *Sinardy Xing
> *Sent:* Thursday, July 05, 2007 2:54 AM
> *To:* ORACLE-L
> *Subject:* raw device
>
>
>
> Hi guys,
>
> Any good link about Oracle + Non RAC + raw device administration?
>
> thanks
>
>
> --
> regards,
>
> Sinardy
>
>
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Received on Thu Jul 05 2007 - 09:28:56 CDT
