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Re: Raw usage in Solaris

From: Pablo Sanchez <pablo_at_dev.null>
Date: Tue, 14 May 2002 11:26:08 -0600
Message-ID: <3ce14707$1_11@news.teranews.com>

"Daniel Morgan" <dmorgan_at_exesolutions.com> wrote in message news:3CE144F7.3FB7C835_at_exesolutions.com...
> Yong Huang wrote:
>
> > Hi, Nuno,
> >
> > You don't need Veritas or SDS to use raw. In fact, if you do,
that's
> > not called raw any more. To allow oracle to read from the raw
device,
> > run chown oracle:dba [thedevice] as root.
> >
> > Direct I/O may speed up or slow down db file read depending on
whether
> > the file is sequentially read (at OS or filesystem level).
Filesystem
> > page cache helps a lot by prefetch if the read is sequential. But
> > using direct I/O allows you to give the memory that otherwise
would be
> > part of page cache to Oracle buffer cache, which manages Oracle
data
> > caching more intelligently. Read Steve Adams' Ixora News - March
2002
> > newsletter.
> >
> > Yong Huang
> > yong321_at_yahoo.com
>
> Is this available on the web? I can't find anything at ixora.com
that
> points to a newsletter.
>

http://www.ixora.com.au/

--
Pablo Sanchez, High-Performance Database Engineering
mailto:pablo_at_hpdbe.com
http://www.hpdbe.com
Available for short-term and long-term contracts
Received on Tue May 14 2002 - 12:26:08 CDT

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