Re: Data Mirroring on two data centers -- How to use ASM ?

  • From: "Alex Gorbachev" <gorbyx@xxxxxxxxx>
  • To: "Madhu V" <db.mail.1@xxxxxxxxx>
  • Date: Fri, 19 May 2006 20:32:52 +0200

Madhu,
I would like to propose again to look for another solution. Host based
mirroring to remote storage box will most probably give you a lot of
problems managing it. I am not even talking about performance (well,
you might just have a nice dark fiber laid there).

Please consider Oracle Data Guard or your vendor's technology. For
example, look at Disaster Recovery Issues and Solutions from Hitachi's
web site 
(http://www.hds.com/download.html?url=/pdf/wp_117_02_disaster_recovery.pdf&region=global&id=219&type=White%20Papers&lang=English&title=Disaster%20Recovery%20Issues%20and%20Solutions).

2006/5/19, Madhu V <db.mail.1@xxxxxxxxx>: 

 Excellent inputs. Thanks to all of you !!

 ASM might not be a best option for me by considering a two node cluster w/
very large amounts of data getting mirrored across two storage arrays. So my
other option would be GPFS. Are there any similar/other concerns with GPFS
in the same architecture ?

 regards,
 Madhu



 Alex Gorbachev wrote:
Salem, if you have a descent size database than it's quite dangerous
 option. I mentioned reference to my blog in previous post - if you
 read it you will understand why. Even short interruption in
 connectivity to remote site might cause ASM to start rebalancing and
 recovery from this is a non-trivial task.

 Replication via Oracle Data Guard or third party tools is a much
 better option. Just storing backups remotely is a much more reliable
 alternative than distance storage box with ASM.

 2006/5/19, Ghassan Salem <salem.ghassan@xxxxxxxxx>:

1- you can use ASM to mirror your data on the remote site, mainly by using a
 'failover' disk group. It's very easy to setup.






--
Best regards,
Alex Gorbachev

http://oracloid.blogspot.com
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