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dbologna13-Aquamarine
13-Aquamarine
January 4, 2023
Solved

When data stored in a value stream is available from thingworx services

I am getting from kepware a number of 160 changes on property A, 80 changes on property B and 40 changes on property C and D. the values ​​are received in a time interval of 90 seconds. These values ​​are stored in a value stream. Could it happen that a service, executed during the arrival of the data, still doesn't see the data, arrived in the previous instant, inside the value stream?

DmitryTsarevAnswer
17-Peridot
January 9, 2023

Are you storing your value streams in Postgres or Influx, clustered or not?

 

To put it shortly, in a simplified / degenerate case, I'd say yes, this is true for many / most "AP" NoSQL databases, as well as for relational RDBMS with master-slave replication or sharded RDBMS.

You can read about the CAP theorem and distributed databases, but take care - it's quite a rabbit hole

 

But what's the question actually about? Do you have a particular issue / use case?

 

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DmitryTsarev17-PeridotAnswer
17-Peridot
January 9, 2023

Are you storing your value streams in Postgres or Influx, clustered or not?

 

To put it shortly, in a simplified / degenerate case, I'd say yes, this is true for many / most "AP" NoSQL databases, as well as for relational RDBMS with master-slave replication or sharded RDBMS.

You can read about the CAP theorem and distributed databases, but take care - it's quite a rabbit hole

 

But what's the question actually about? Do you have a particular issue / use case?

 

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