| Info |
|---|
Applies to version 14 beta 4 and above. |
Connexion can be setup in a fault-tolerant configuration to provide hardware fail-over capabilities. The figure below illustrates the standard fail-over configuration for Connexion. The Sql Server back-plane can utilize any of redundancy mechanisms built into Sql Server: Always On, Hardware Clustering, Mirroring, or log shipping. "Always On" requires Sql Server Enterprise Edition which is expensive, so we recommend Mirroring which works with Sql Server Standard Edition.
The Connexion Cluster, shown above, consists of 2 computers, or virtual machines, which are bound to the same Connexion Configuration Database. The Cluster is an Active/Passive cluster where 1 node is performing work, and the other is on standing by.
Since many of the Connections coming into Connexion will be HL7, a network switch (hardware, or software) must be used to route the network traffic to the active node in the cluster. Connexion can be configured to have the active node periodically ping the Network Switch to notify the switch which node in the cluster the network traffic should be directed to.
Connexion databases can be named, so it is possible to have multiple Connexion instances hosted by the same database server. It is also possible to have the Connexion message databases hosted by different database servers.
Configuring Database Mirroring
Connexion version 14 can be deployed in active-passive pairs in order to provide hot fail-over. In order to provide a fully automatic fail-over, the following components are required:
...
Install Connexion on the primary / active machine and during the installation configuration, point it to the SQL Server instance installed on the same machine (the primary / active). The next step is to install Connexion on the secondary / passive machine and during the installation configuration, point it to the SQL Server instance installed on the primary machine. When an installation of Connexion is pointed to a SQL Server instance which is already in use by another Connexion, a cluster is created.
| Info | ||
|---|---|---|
| ||
| Please watch the following video |
...
| for more information on configuring Connexion in a fault-tollerant mode: How to add an application server / clustering - May 2014 |
Connexion User Interface for Managing Cluster Nodes