Some Quick clarification about 2012 and always on Availability groups

Hi guys, just need some clarification about always on.
I've got plenty of experience with normal SQL Clusters, but just need some clarification around always on availability groups.
I presume with AG, you setup a listener and this becomes your point of connection, IE this is what you use in the you connection string for you applications, so can I use this when I am setting up a new application, and will this automatically make the Database
that's created by the APP, Highly available. ? or do you still have to add it to the AG afterwards. ?
I have also read that you can still point to the installed SQL instance, and you don't need to use the AG group listener, but how does this make your DB HA ? how does the failover work.
I also presume you don't need to use any roles under the MSC anymore.
Kind regards
Mark.G

Hi Mark
I presume with AG, you setup a listener and this becomes your point of connection
That's right, the listener is a virtual network name and you can use this to connect to the primary or secondary replica. Your connections will go in against the primary unless you're using
read-only routing.
so can I use this when I am setting up a new application, and will this automatically make the Database that's created by the APP, Highly available
The first thing you'll have to do is set up the availability group (AG). You can then associate a listener to the AG. I know you're familiar with failover clustering but the mechanics of this are much closer to database mirroring. For every database that's
part of the AG you'll have at least one secondary replica, it's possible to automatically failover to this if you're in synchronous mode.
I have also read that you can still point to the installed SQL instance, and you don't need to use the AG group listener, but how does this make your DB HA ? how does the failover work.
Yes you can do, but from an application perspective you should only do this for databases that are not part of an AG. If you connect to the instance directly and you have a failover your app will no be able to connect to the database (on the assumption your
secondary isn't read-only). App connections should always be via the Virtual Network Name.
I also presume you don't need to use any roles under the MSC anymore.
Not sure I understand this? Do you mean will roles be available in cluster manager? Each AG group will have a role but failover is now controlled through the SQL Server rather than the cluster manager.

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Sql 2012 always on availability group use cases

i have setup the always on availability group between 2 sql servers.
in the primary site, my app is connected to the primary site.
The DB is in an always on group replicated to the secondary site.
so what is the use of the secondary replica for?
If the primary db server goes down, what will happen?
Can apps use the replica db? but its read only
what is the purpose of this?

I agree with David.
JonDoe,
What you are asking is known as "active secondary" in AlwaysOn
http://msdn.microsoft.com/en-us/library/ff878253.aspx
Automatic failover can be configured. Refer
http://msdn.microsoft.com/en-us/library/hh213151.aspx
Be aware of http://support.microsoft.com/kb/2833707
Balmukund Lakhani
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SQL 2012 Always On Availability Groups

Has anyone configured FIM SYnc, FIM Service and MSF in SQL 2012 Always On Availability groups
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I commented on this here:https://social.technet.microsoft.com/Forums/en-US/64f55628-3b5d-4d16-9044-dcbe7053581d/lack-of-support-for-fim-database-mirroring?forum=ilm2
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David http://blogs.msdn.com/b/dbrowne/

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Balmukund Lakhani
Please mark solved if I've answered your question, vote for it as helpful to help other users find a solution quicker
This posting is provided "AS IS" with no warranties, and confers no rights.
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Author: SQL Server 2012 AlwaysOn -
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I found this information regarding SQL 2014. This could be helpful
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Balmukund Lakhani
Please mark solved if I've answered your question, vote for it as helpful to help other users find a solution quicker
This posting is provided "AS IS" with no warranties, and confers no rights.
My Blog |
Team Blog | @Twitter
| Facebook
Author: SQL Server 2012 AlwaysOn -
Paperback, Kindle

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It appears to be working. I've attached a picture of the role that was created when I was finished configuring WSFC. Is there something that would I can check that would give me a definitive answer?

I am testing SQL 2014 availability groups and I have run into a snag. I setup a win2k8 r2 DC and two windows 2012 R2 servers running SQL 2014 standard. I setup failover clustering for the two SQL servers. In SQL Management Studios I have setup the availability group and everything seems to have been successful. except when the wizard completes I get an error Creating availability group listener resulted in an error.....Error 41009.The AG seems to be working I can connect to the AG in SSMS using the listener name. But in the Availability Group Listener section there is no listener setup. Also the databases also seem to be read only if I connect thru the listener name. The AD computer account seems to be setup correctly. I am just unable to create the listener in SQL. Is there a security permission in SQL that I could have missed. Any...
This topic first appeared in the Spiceworks Community

Some Quick clarification about 2012 and always on Availability groups

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