How is redundancy (high availability) within a data centre and across data centre managed for 'Real time database'? 1. Assuming within Datacentre Active-Passive (Standby) configuration can be made 2. How is the data syncd between Active-Passive nodes within the datacentre and across datacentre
Hello, there are three types of redundancy within EcoStruxure Machine SCADA Expert.
1) WEB CLIENT Redundancy: If you developed the application as a web application, you can configure a redundant web server to continue to serve the HMI Screens if the "Primary" HMI goes down.
2) DATABASE Redundancy: If you are using a SQL or equivalent type of database, you can configure the database connection to be redundant or store and forward.
3) Based on your question, I believe you are talking about the project tags within in the application. This is done using the shared database(Project Explorer->Global ->Shared database) and a simple heartbeat script to ensure the runtime is active. The script can be used to control the communication tasks which can be enabled or disabled to help reduce network traffic.