RE: RAC & RAW Question

From: Hallas, John, Tech Dev <John.Hallas_at_gb.vodafone.co.uk>
Date: Tue, 26 Apr 2005 16:48:51 +0100
Message-ID: <1C6E45ADB2EC324F9553E468ABFE0F6301C5D9E4@UKWMXM04>

Stephen,
One aspect that might not have been covered in the responses was the = fact that on some (many?) sites you might need 2 people to correct a = space problem rather than just a DBA adding or resizing a datafile. I hesitate to say normally but on the larger sites work is often split = between DBAs and Sys Admins and extending a raw filesystem needs both = people. Which is a nuisance at night when they both have to be called = out.

HTH John

-----Original Message-----

From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org]On Behalf Of Stephen Andert Sent: Friday, April 22, 2005 10:40 PM
To: oracle-l_at_freelists.org
Subject: RAC & RAW Question

Hi all,=3D20

I am working on getting RAC set up. It is sr mgmt's idea and I'm not sure that it will provide what they think it will.

I have a question about growing with RAW.

I read in a book that RAW partitions cannot be extended. After discussing this with my friendly neighborhood SysAdmin team, they have told me that growing a RAW partition/device is not a problem. They don't even think I need to bring down the database.

My questions are:

Q1. Is it possible that the author was speaking in general terms and that in my environment, we have an OS, etc that allows this (AIX, EMC)? Q2. Is it that the OS can do it, but the database cannot recognize it? (I thought a alter database datafile ... RESIZE would work)

Q3. Can anyone point me towards a best practices with RAW white paper?

Q4. Does anyone have any pointers towards converting a cooked database to RAW? It is large enough that export/import will take more time that I think we will get approved for. We are theorizing that if we "reshape" the database to tablespaces with single files that match the sizes of the RAW devices we will be getting, that an RMAN alternate node restore with file rename will work. Thoughts or comments on this?

Thanks
Stephen
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http://www.freelists.org/webpage/oracle-l Received on Tue Apr 26 2005 - 11:53:24 CDT