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Can TSA cluster cross sites?
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Last Post:
Jul 6, 2009 4:13 PM
Last Post By: JamesCWang
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Posts:
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Registered:
Jun 24, 2009 11:48:52 AM
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Can TSA cluster cross sites?
Posted:
Jun 24, 2009 12:06:32 PM
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Hi,
It will be greatly appreciated if someone can tell me whether TSA can be used for both HA and DR.
Here is the HA and DR scenario. Site A (New York) has a DB2 production database, and Site B (Seattle) has its DB2 HADR standby database. At each site, there are two servers allocated for the TSA cluster. The HA/DR requirements are if a local server fails, TSA should fail over the local DB to the local standby server. In the event of the site A failure, then TSA should automatically crown the DB2 standby DB at site B as the production DB.
Can TSA be used for the above scenario? If it can, I would appreciate someone outline the high level setup.
Thanks,
Jim
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Posts:
24
Registered:
Oct 28, 2005 01:58:48 PM
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Re: Can TSA cluster cross sites?
Posted:
Jun 25, 2009 04:30:32 PM
in response to: JamesCWang's post
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> Can TSA cluster cross sites?
Yes, streched TSA clusters are possible.
Nodes of a TSA cluster do not even have to be on the same Layer-2 Ethernet VLAN, but you would have to use VIPA with dynamic routing (eg. OSPF) to fail-over an IP address. (Alternatively you could dynamically change the DNS name-to-IP-address mapping during fail-over between the two sites and restart all clients.)
In your planned setup, you should pay attention to node quorum. A fifth node at site C would be perfect.
Another option would be to have two seperate TSA clusters at site A and B and use TSA Application-Manager (End-to-End Automation) to coordinate the failover between the two TSA clusters.
regards, Armin.
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Posts:
2
Registered:
Jun 24, 2009 11:48:52 AM
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Re: Can TSA cluster cross sites?
Posted:
Jul 06, 2009 04:13:32 PM
in response to: ARW's post
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Armin,
Thanks for the TSA stretched cluster and TSA Application Manager information.
Can you point me to any paper or documentation? I would like to know more about how to set it up.
Jim
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