Re: Disaster Recovery Planning

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From: Mike Hodgson (mwh_junk_at_hotmail.com)
Date: 12/21/04 

Date: Tue, 21 Dec 2004 13:19:54 +1100

How long is a piece of string?

DR plans are pretty specific to the company/environment in question.
I've set up an active/active SQL cluster in our DR site and am using log
shipping to keep the DR databases in sync with the production DBs;
combined with MDAC aliases, non-standard TCP ports for SQL & DNS aliases
for the server names to allow to very quick, transparent redirection of
client connections to the DR servers in the event of a disaster. I also
wrote a stored proc (that resides on our log shipping monitor box) to
automate all the log shipping role changes (150+ databases is a bit too
time consuming to do manually). Works pretty well too (we had a
"disaster" in August this year when our SAN vendor stuffed up an upgrade
on our production SAN - what a crappy weekend that was!)

My only revision to my SQL DR plan/environment would be more RAM & CPU
for the DR servers as I'm consolidating 4 production SQL instances down
to the 2 DR instances on the active/active cluster (plus a few other DBs
that don't live on our production clusters). The cluster nodes were
pretty stressed for a week back in August but it's hard to justify
spending the extra $$$ when the servers are really only used (hopefully)
very infrequently (like one week in a year).

Cheers,
Mike.

Cqlboy wrote:
> I've never seen a disaster recovery plan for SQL Server. Can anyone one
> direct me to an example. This would be immensley helpful to understanding
> how to put one together. Thanx. -Cqlboy

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