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Cluster question

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Cluster question - 10.Jun.2009 5:31:16 PM   
catzodellamarina

 

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I understand that traditional clustering has been replaced by DAG and that the databases are failed over rather than the entire server.  What happens in the event of total server (hardware) failure?  How will the 2nd server know when it's time to take over all roles?  Is there still a heartbeat between 2 servers?
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RE: Cluster question - 11.Jun.2009 3:52:16 AM   
neilho

 

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The Active Manager is a process that runs on every server in the DAG (one is primary, the rest secondary).  It's effectively the brain of Exchange 2010's high availability and decides which copies of the databases are active and passive. 

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(in reply to catzodellamarina)
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RE: Cluster question - 11.Jun.2009 10:36:52 AM   
catzodellamarina

 

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What if the "primary" server has a failure?  How does it let a 2nd server know when to take over all Exchange operations?  Is there a heartbeat NIC?

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RE: Cluster question - 11.Jun.2009 6:21:42 PM   
Elan Shudnow

 

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quote:

ORIGINAL: catzodellamarina

What if the "primary" server has a failure?  How does it let a 2nd server know when to take over all Exchange operations?  Is there a heartbeat NIC?


The Primary Active Manager is the server that has the default Cluster Group. So if that primary server fails, the Cluster Group will failover to another server which would then become the PAM and would then decide which database is most suitable to become the new primary.

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(in reply to catzodellamarina)
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