Re: [suse-oracle] Raw Partitions - Device Name Persistence on SUSI

Hi,

I remember using the Open Source Linux Multipath with a clariion box and
it definitely provided device name consistency too.

You had to enter the list of LUN IDs in /etc/multipath.conf.

Four years ago, their IO balancing algorithm was not as elaborate as EMC
PowerPath,
but for a free and simple configuration, you could definitely use it for
production environment.

Damien>


-----Original Message-----
From: Bobby Keegan <[email protected]>
To: '[email protected]' <[email protected]>,
[email protected] <[email protected]>
Subject: Re: [suse-oracle] Raw Partitions - Device Name Persistence on
SUSI
Date: Tue, 20 Jul 2010 14:47:12 -0400


We're using EMC Powerpath which appears to have device name persistency. We then map the raw1:emcpowera1. The /dev/sd? will change under the covers but the emcpower will map to the appropriate LUN.

-Bobby

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of [email protected]
Sent: Tuesday, July 20, 2010 2:37 PM
To: [email protected]
Subject: [suse-oracle] Raw Partitions - Device Name Persistence on SUSI


Folks,

We have been struggling with our Oracle RAC / SUSI Linux configuration for
months.  I am a DBA with limited SysAdmin experience.  I have however
worked with raw partitions for many years in other positions and never ran
into these issues.

We are installing Oracle 11g RAC Standard Edition on top of SUSI 10.  We
are using raw partitions and Oracle Clusterware.  Early on we hit the
problem of our device names changing when changes were made to the
underlying storage (EMC Clarion).  We have been able to protect our
database data partitions with ASMLib but of course ASMLib can't be used on
the Clusterware partitions (voting disks and OCR).  We haven't found a good
solution yet.  Oracle Clusterware doesn't support Logical Volume Managers
and Novell told my Sysadmin that SUSI doesn't support using udev to provide
device name persistence.

What does everyone out there use to provide device name persistence on
SUSI?  Surely everyone deploying RAC on SUSI doesn't have to deal with
device names changing everytime the underlying storage changes.
Reinstalling Clusterware each time isn't a good long-term strategy.  :)

Many Thanks,

Scott Uhrick
Gen Re DB Support
203 328-5338 (work)

-----------------------------------------
This transmission, including attachments, is intended for the
person or company named and may contain confidential and/or legally
privileged information.  Unauthorized disclosure, copying or use of
this information may be unlawful and is prohibited.  If you are not
the intended recipient, please delete the original and all copies
of this transmission and notify the sender.

_______________________________________________
suse-oracle mailing list
[email protected]
http://listx.novell.com/mailman/listinfo/suse-oracle
-----------------------------------------
The information contained in this email and any attachments may be
privileged and/or confidential and protected from disclosure.  It
is intended solely for the use of the recipient(s) to whom it is
addressed, or an employee or agent responsible for delivering this
message to the intended recipient(s).  You are hereby notified that
any dissemination, distribution, copying or other use of this
communication is strictly prohibited.  If you have received this
communication in error, please notify the sender by reply email and
delete this email and all attachments from your system.  Thank you.
_______________________________________________
suse-oracle mailing list
[email protected]
http://listx.novell.com/mailman/listinfo/suse-oracle

_______________________________________________
suse-oracle mailing list
[email protected]
http://listx.novell.com/mailman/listinfo/suse-oracle