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 Mirroring vs clustering, practical experience?

Author  Topic 

daimne
Starting Member

17 Posts

Posted - 2008-10-14 : 11:46:01
I'm trying to add to my practical experience on setting HA -
Mirroring vs clustering.
Any practical opinion will be appreciated!

TIA

sodeep
Master Smack Fu Yak Hacker

7174 Posts

Posted - 2008-10-14 : 11:49:46
Did you search in google or Microsoft whitepaper regarding it?
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tkizer
Almighty SQL Goddess

38200 Posts

Posted - 2008-10-14 : 12:26:16
daimne,

Do you have any specific questions about them or did you just want us to spend several hours writing up a response?

Tara Kizer
Microsoft MVP for Windows Server System - SQL Server
http://weblogs.sqlteam.com/tarad/

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daimne
Starting Member

17 Posts

Posted - 2008-10-14 : 14:02:05
Tara thank you!
will appreciate brief - one paragrap response. I know, lots of factors may be important to know before making decision on either one. I've been working with clustering technology for many years by now, oracle, db2, a some Ms sql too. Specifically I'd be interested in practical failover time for both cases (assuming simple scenario 2 nodes active/active), maintenability, license cost etc...
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tkizer
Almighty SQL Goddess

38200 Posts

Posted - 2008-10-14 : 14:24:15
We use both cluster and database mirroring. Clustering is used to minimize downtime due to OS/SQL patches, etc at our primary site. We also database mirror everything to another site located 300 miles away for disaster recovery purposes.

Both can failover quickly. They are two very different beasts though and can be used together to provided a very highly available solution.

Tara Kizer
Microsoft MVP for Windows Server System - SQL Server
http://weblogs.sqlteam.com/tarad/

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daimne
Starting Member

17 Posts

Posted - 2008-10-14 : 16:06:36
thanks. this helps!
One question: when you don't have access to the application (to add failover to connect string..) and you need to set up mirroring for the database; what would you do?
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tkizer
Almighty SQL Goddess

38200 Posts

Posted - 2008-10-14 : 16:22:05
You don't need access to the application in order to setup database mirroring. Perhaps I don't understand your question though.

Tara Kizer
Microsoft MVP for Windows Server System - SQL Server
http://weblogs.sqlteam.com/tarad/

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sodeep
Master Smack Fu Yak Hacker

7174 Posts

Posted - 2008-10-14 : 18:43:49
Search for Application Failover in Database Mirroring .There is nice whitepaper regarding this.
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daimne
Starting Member

17 Posts

Posted - 2008-10-17 : 18:33:46
one way to set seemless failover by using: Data Source=A;Failover Partner=B;Initial Catalog=AdventureWorks;Integrated Security=True;" on the client site! if you have an access to it ;)
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