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Non-Redundant / Simplex Mode Deployment

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Non-Redundant / Simplex Mode Deployment
Non-Redundant / Simplex Mode Deployment

High Availability (HA) / Duplex Deployment

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DAW:Deployment Architecture
DAW:Deployment Architecture

Failover scenarios


Failover ScenarioBehavior 
1When one of the VMs/nodes are downThe VIP will route the traffic to the secondary VM. All read/write operations will continue to work. 
2When both of the VMs are downAll read/write operations will fail and a manual intervention will be required. 

Out of Scope

  • Component-Level Failover: Failover of individual components is not supported. 
  • Network-level failover support: The internal network/link between the VMs (or the Docker network) is assumed to be working all the time. DB Cluster: 

Assumptions

  • Both VMs must be on the same subnet. Otherwise, the failover won't work.
  • Setting up the DB cluster for MS SQL Server lies under the Customer responsibility.   
  • Manual intervention will be required when both VMs are down.

Failover scenarios

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