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HA on Active / ACtive and DR on DB Mirroring


HA on Active / ACtive and DR on DB Mirroring

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Kishore-132325
Kishore-132325
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I have 2 SQL Servers in HA set up in Active / Active cluster where we have one DB - named XYZ. Versions : Windows Server 2008 R2 and sql server 2008 R2

We have a 3rd SQL Server in DR Setup where we have asynch DB Mirroring setup b/w the DR node and Active/Active Cluster.

What will happen when the cluster is failing over to another node and the Mirroring swaps roles and another node becomes Principal. Will Mirroring continue to work from another node [ new Principal ] to DR node ? Or will we see any problems ?
Perry Whittle
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Kishore-132325 (9/25/2012)
I have 2 SQL Servers in HA set up in Active / Active cluster where we have one DB - named XYZ. Versions : Windows Server 2008 R2 and sql server 2008 R2

We have a 3rd SQL Server in DR Setup where we have asynch DB Mirroring setup b/w the DR node and Active/Active Cluster.

you have a multi instance cluster is that correct?



Kishore-132325 (9/25/2012)
What will happen when the cluster is failing over to another node and the Mirroring swaps roles and another node becomes Principal. Will Mirroring continue to work from another node [ new Principal ] to DR node ? Or will we see any problems ?

What mode is your mirror session configured for?
Asynch, synch, auto failover???

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"Ya can't make an omelette without breaking just a few eggs" ;-)
Kishore-132325
Kishore-132325
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Yes multi instance cluster...

DB Mirroring is in Asynch mode and Manual failover...
Perry Whittle
Perry Whittle
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Kishore-132325 (9/25/2012)
Yes multi instance cluster...

DB Mirroring is in Asynch mode and Manual failover...

If the cluster fails over and the failover time exceeds the mirror timeout (default is 10 seconds) the mirror will become disconnected.

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"Ya can't make an omelette without breaking just a few eggs" ;-)
Kishore-132325
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ok, gotcha..
but after the failover has happened, the Mirroring should establish connection back with New Principal and get synchronised rite?
Perry Whittle
Perry Whittle
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Kishore-132325 (9/25/2012)
ok, gotcha..
but after the failover has happened, the Mirroring should establish connection back with New Principal and get synchronised rite?

What new principal?
The mirror session is created against the clustered SQL Server instance not the cluster node it runs on.

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"Ya can't make an omelette without breaking just a few eggs" ;-)
Kishore-132325
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got it... thank you Smile
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