Active/Active user distribution site resiliency

  • Thread starter Maurício Penhalver
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Maurício Penhalver

Hi Guys,

I have a scenario like this:
01 DAG
02 AD Sites (SITE A and SITE B)
04 MBX Servers (2 per site)

MBX01A will have active databases and MBX01B will have passive databases from MBX01A
MBX02B will have active databases and MBX02A will have passive databases from MBX02B

I checked the and the calculator does not include the Active/Active Scenario, but they say that we could try this:
Launch two versions of the calculator.

Populate the first version for the first DAG in your design. This DAG (DAG1) will utilize Datacenter 1 as its primary location (and thus its user population is based out of Datacenter 1). It has site resiliency by having servers and database copies located in Datacenter 2 that can be activated in the event Datacenter 1 is lost.
Populate the second version for the second DAG in your design. This DAG (DAG2) will utilize Datacenter 2 as its primary location (and thus its user population is based out of Datacenter 2). It has site resiliency by having servers and database copies located in Datacenter 1 that can be activated in the event Datacenter 2 is lost.
Datacenter 1 Datacenter 2
DAG1 Active Passive
DAG2 Passive Active

By implementing the architecture in this way, you can ensure that for the majority of scenarios except loss of datacenter, the users remain operational in their primary datacenter location.

This is the first time that i use the Exchange Calculator but i really does not understand how could i use it to help me in this scenario.
Because in a loss of a datacenter all databases will be activated in another site and the Exchange Calculator does not calculate the increase of load in this datacenter.

Does anybody have any suggestion?

Brian Day MCITP

Essentially you're designing two active/passive clusters and joining them to the same DAG. I say they're A/P becuase you are not mixing DB loads between the servers at all. I would design your system as if you only had one site and then copy what you have there in the other site.
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