RE: Oracle backups using Snapshot Technology

Yes, I believe the FastCopy option does have a cost associated with it...

Rich

-----Original Message-----
From: Alex Gorbachev [mailto:gorbyx_at_gmail.com] Sent: Thursday, November 09, 2006 12:42 PM To: Jesse, Rich
Cc: oracle-l_at_freelists.org
Subject: Re: Oracle backups using Snapshot Technology

And if performance would be an issue that split mirror technique is the way to go.
Btw, do you know if there are any additional licensing associated with FAStT's snapshots feature?
Thanks.

On 11/9/06, Jesse, Rich <Rich.Jesse_at_qg.com> wrote:
> My initial concern was the overhead of block copying while the
FlashCopy
> logical drive is active, which for us is all day. This is made worse
by
> starting up an instance on that logical drive because now not only are
> there block copies for initial writes to the primary, but also for
> initial writes of blocks on the secondary. Plus, our secondary is on
> the same server as the primary, so the penalty for nasty ad-hoc
queries
> on the secondary is almost the same as if it were run on the primary.
> For us, this was not a problem after lots of testing showed that even
> with the overhead, our new hardware was still muuuuuuuch faster than
our
> old system. :) I have not heard of a single performance problem
> related to this in over two years of using it.

-- 
Best regards,
Alex Gorbachev

The Pythian Group
Sr. Oracle DBA

http://www.pythian.com/blogs/author/alex/
http://blog.oracloid.com
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