There are two types of DEMs that are used within vCAC. Those are:
- Orchestrator DEM
- Worker DEM
DEMs in General
You have to have at least one Orchestrator DEM and Worker DEM, but depending on the size of your environment you may have more than one of each. You may have more than one of each for redundancy purposes as well. DEMs can be installed in active-active pairs providing full resiliency for each other. DEM’s communicate with the vCAC Model Manager to receive work items that need processing. The really nice part is they pull from the Model Manager, the Model manager doesn’t push items to them. This is very helpful if you need ti utilize a DEM in a fire-walled environment.
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Sid Smith
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VCP, VTSP, CCNA, CCA(Xen Server), MCTS Hyper-V & SCVMM08
[http://www.dailyhypervisor.com]
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