What is 'handleRedundancy' in the NGA

[fmulder]

I'm investigating the NGA. The help file says that the dp element 'handleRedundancy' specifies
"Database is capable of handling redundancy on its own (redundancy-aware database)."

But what does this mean for the NGA manager (or its backend). What is the difference in the storage of data when you specify true or false ?
How do the operations of the NGA manager change ?

Thanks

share the fun
Frenk Mulder

[hpuchegger]

Be aware that you should not change this value. The handleRedundancy function in WinCC OA is responsible for managing the redundancy state of the system. The flag will be set automatically when a database is used which is capable of redundancy on its own. In general you should never change values of internal datapoints or internal datapoints itself:
"Internal data points may never be changed. The internal data points are configured via the configuration panels of user interfaces and some data point types are therefore not described in detail here."

Please have a look at a related chapter of our online documentation:
https://www.winccoa.com/documentation/W ... wardb.html

Br, Herbert

[fmulder]

We have been using PostgreSQL in the redu-aware mode. This doesn't worj well because the pgClusterMonitor script is not working very well.
We are now investigating the non-redu-aware setup (using two backends)

We were hoping/wondering the purpose of the 'handleRedundancy' element. Can we change the behavior of the NGA somehow ?

[hpuchegger]

Are you aware that dual redundancy is only available after 3.20?

In any way, those internal datapoints should not be changed at all.

Br, Herbert