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Category: Mirroring

Database Mirroring

Published 2016-04-13 by Kevin Feasel

Derik Hammer has chosen Database Mirroring as his favorite feature:

With the end of SQL Server 2005, we also will soon see the end of database mirroring. There is a new feature releasing with SQL Server 2016 called Basic Availability Groups. This is the replacement for database mirroring. The use cases and limitations will appear very similar to database mirroring but it will use the Availability Group technology. In theory this will be like a stim-pack for the database mirroring feature while leaving it available in Standard Edition. Let’s cross our fingers that the Windows Failover Cluster components don’t slow down the failovers like it did with AGs.

A bold choice, but that “available in standard edition” thing is huge for smaller organizations which can’t afford Enterprise (especially with The Licensing Changes of 2012).

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Granting Permissions In AGs Or On Mirrors

Published 2016-03-07 by Kevin Feasel

Matan Yungman discusses how to grant permissions only to the replica database in a mirroring or Availability Groups scenario:

You work with Database Mirroring or AlwaysOn AG, and you want to make sure your end users work only on the secondary server. How should you do that?

This solution feels a little hacky to me.  There’s enough value in it that I could see companies doing this, but it’d be nice if there were an easier way.

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Check Endpoint Security

Published 2016-02-03 by Kevin Feasel

Erik Darling ran into an issue with endpoint security while setting up mirroring:

This is the error text:

The ALTER DATABASE command could not be sent to the remote server instance ‘TCP://ORACLEDB.darling.com:5022’. The database mirroring configuration was not changed. Verify that the server is connected, and try again.

SUPER SLEUTH

Alright, that’s silly. I used the GUI. Instead of going to bed I’ll spend some time checking all my VM network settings. BRB.

I’m back. They were all correct. I could ping and telnet and set up linked servers and RDP. What in the name of Shub-Niggurath is going on with this thing?

These things always happen right before bed, right before the big meeting, right before lunch.  They never happen on a slow Tuesday afternoon, it seems…

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