John,

    Take a look at
http://www.veritas.com/news/press/FeatureArticleDetail.jhtml?NewsId=9457

Dick Goulet

____________________Reply Separator____________________
Author: Scott <[EMAIL PROTECTED]>
Date:       6/20/2002 1:10 PM

John, ODM is a standard created by Oracle for how the
database wishes to do I/O. Oracle published a standard
for how they would like to do I/O and Veritas created
an ODM compliant version for VxFS. ODM also leverages
the performance gains implemented in QIO. Veritas has
also added some management features that will help the
DBA. ODM is just like QIO in that will allow Oracle to
access the underlying storage without passing through
the actual filesystem give you more less raw I/O
performance. ODM also address some limitations of QIO
such as file resizing and allowing the use of file
names. Veritas provides the Libraries necessary for
Oracle to use as its I/O library. ODM also has
clustering extensions for RAC. This allows you to use
RAC on Cluster file systems with Veritas. Oracle does
not use file descriptors with ODM but use ODM
identifiers instead.

This all I know about ODM. 

Scott


--- John Weatherman <[EMAIL PROTECTED]>
wrote:
> All,
> 
> I will be more than happy to RTFM if someone could
> be so kind as to tell me
> _which_ manual I should look at!  We are migrating
> to new Sun Servers with
> Veritas and 9i.  Our consultants (who are actually
> pretty good) are
> recommending we use Oracle Disk Manager w/ Veritas. 
> However I can't find
> anything but a white paper long on generalities and
> short on specifics that
> references ODM.  Any ideas?
> 
> TIA,
> 
> John P Weatherman
> Database Administrator
> Replacements Ltd.
> -- 
> Please see the official ORACLE-L FAQ:
> http://www.orafaq.com
> -- 
> Author: John Weatherman
>   INET: [EMAIL PROTECTED]
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