Solved

DB Mirroring / Auto-Failover Questions

Posted on 2010-08-16
2
455 Views
Last Modified: 2012-05-10
[SQL Server 2008]

These are goofy questions, I'm sure, but I want to be positive.

Picture SQL1 and SQL2 are my principal and mirror servers.  SQL3 is the witness.

(1)  Mirroring is database-by-database, which I love.  But just to make sure, if my witness server sees that DB1 is no longer responsive on SQLL1, it will only fail over *DB1*, right?

In other words, so if I have DB1 and DB2 on SQL1, both mirrored to SQL2...if I take DB1 offline, the failover is only scoped to DB1, right?  My applications that request DB2 are still going to use SQL1, right?  And DB2's requests are then routed to SQL2?

(2)  Now picture ANOTHER sql box.  It's SQL4, and it just has SharePoint 2010 or something on it.

Now, I also want to mirror DBs on this box to SQL2...so that if SQL4 goes south, my SQL3 witness server will still work for this relationship.

So, that witness box will need to monitor DBs between SQL1 and SQL2, but also between SQL4 and SQL2.

Will it do that?  Seems too good to be true.

Thanks.
0
Comment
Question by:bamapie
2 Comments
 
LVL 12

Accepted Solution

by:
Máté Farkas earned 500 total points
ID: 33452762
1. Yes it is true. But if you use SQL Native Client for connecting to mirroring session this is no problem (one database from SQL1 another from SQL2). In any case you can use a trick to fail over other databases automatically: http://www.mssqltips.com/tip.asp?tip=1564
2. One Wittness server can inspect multiple servers and multiple mirroring sessions if you configured it. So yes, you can use SQL3 wittness to controls fail over between SQL4 and SQL2.
0
 

Author Closing Comment

by:bamapie
ID: 33454633
Beautiful
0

Featured Post

Complete VMware vSphere® ESX(i) & Hyper-V Backup

Capture your entire system, including the host, with patented disk imaging integrated with VMware VADP / Microsoft VSS and RCT. RTOs is as low as 15 seconds with Acronis Active Restore™. You can enjoy unlimited P2V/V2V migrations from any source (even from a different hypervisor)

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

As a database administrator, you may need to audit your table(s) to determine whether the data types are optimal for your real-world data needs.  This Article is intended to be a resource for such a task. Preface The other day, I was involved …
Ever needed a SQL 2008 Database replicated/mirrored/log shipped on another server but you can't take the downtime inflicted by initial snapshot or disconnect while T-logs are restored or mirror applied? You can use SQL Server Initialize from Backup…
Internet Business Fax to Email Made Easy - With  eFax Corporate (http://www.enterprise.efax.com), you'll receive a dedicated online fax number, which is used the same way as a typical analog fax number. You'll receive secure faxes in your email, f…
Both in life and business – not all partnerships are created equal. As the demand for cloud services increases, so do the number of self-proclaimed cloud partners. Asking the right questions up front in the partnership, will enable both parties …

910 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

23 Experts available now in Live!

Get 1:1 Help Now