Albert Widjaja
asked on
Exchange 2013 DAG failing over after backup ?
Hi people,
Last night after the successful backup on one of the primary DAG node in my data center, I can see the Active Database has been changed to the passive server in DR-Site all in a sudden ?
Database copies
PROD-DB01\PRODMBX01-VM
Passive Healthy
Copy queue length: 0
Content index state: Healthy
Suspend | Activate | Remove
PROD-DB01\RECOMBX01-VM
Active Mounted
Copy queue length: 0
Content index state: Healthy
So how can I ensure the failback to the production mailbox server is done with no email lost or email flow problem ?
What would be the impact when I click on Activate button during the business hours.
I already executed:
Note:
The VMs are running on VMware and the backup software I use is Veeam backup.
Last night after the successful backup on one of the primary DAG node in my data center, I can see the Active Database has been changed to the passive server in DR-Site all in a sudden ?
Database copies
PROD-DB01\PRODMBX01-VM
Passive Healthy
Copy queue length: 0
Content index state: Healthy
Suspend | Activate | Remove
PROD-DB01\RECOMBX01-VM
Active Mounted
Copy queue length: 0
Content index state: Healthy
So how can I ensure the failback to the production mailbox server is done with no email lost or email flow problem ?
What would be the impact when I click on Activate button during the business hours.
I already executed:
cluster /prop SameSubnetThreshold=20:DWORD
cluster /prop SameSubnetDelay=2000:DWORD
cluster /prop CrossSubnetThreshold=20:DWORD
cluster /prop CrossSubnetDelay=4000:DWORD
cluster /prop RouteHistoryLength=40:DWORD
Note:
The VMs are running on VMware and the backup software I use is Veeam backup.
SOLUTION
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ASKER
My all of my exchange mailbox server contains mixed Active and Passive database.
So there is no way to separate the backup job.
So there is no way to separate the backup job.
No There would be no outage as it takes hardly 9 -10 seconds to activate so users would not notice this
HA log path
Event Viewer ==>Applications and services logs ==>Microsoft=>ManagedAvala bility
Checked for the Recoveraction and Monitoring
HA log path
Event Viewer ==>Applications and services logs ==>Microsoft=>ManagedAvala
Checked for the Recoveraction and Monitoring
ASKER
Pradeep,
I assume there will be no data loss when I fail over to the primary data center mailbox DB ?
I assume there will be no data loss when I fail over to the primary data center mailbox DB ?
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ASKER
OK, so if I change it into Lossless on the fly, and then click on Activate.
When the queue length is 12+ the DB will be mounted again after the queue length reach 0, hence nothing is lost.
When the queue length is 12+ the DB will be mounted again after the queue length reach 0, hence nothing is lost.
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That is correct, users may experience a short disconnect from Outlook client as it activates on the passive database copy.
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ASKER
Thanks all for the sharing !
ASKER
Where can I find the HA log ?