Re: The Right Manual

From: Scott <oraracdba_at_yahoo.com>
Date: Thu, 20 Jun 2002 13:11:00 -0800
Message-ID: <F001.00483799.20020620131100@fatcity.com>

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 <john.weatherman_at_replacements.com> 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: john.weatherman_at_replacements.com
  >
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Scott
  INET: oraracdba_at_yahoo.com

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Received on Thu Jun 20 2002 - 16:11:00 CDT