When using STaaS and cloud connectivity is lost, what happens?

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When using STaaS, what happens if connectivity to the cloud is lost?

We understand that DataMiner buffers data locally and uploads it to STaaS after connectivity is restored.

What user-visible and system-level impacts should be expected during the outage? For example:

Operator experience in Cube/Web Apps
Alarming and monitoring behavior
Trending and historical data availability
Automation execution
Effects of extended outages and any buffering limitations

Thanks,
Steve

Steve Purcell [SLC] [DevOps Advocate] Selected answer as best

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Hi Steve,

When using STaaS the same behaviour will occur as it would when losing the connectivity to an on-prem database. The system will go into offload mode and will replay it when the connectivity returns.

Any impacts on the system are the same as you would see on any other database.

Steve Purcell [SLC] [DevOps Advocate] Posted new comment
Steve Purcell [SLC] [DevOps Advocate] commented

Hi Ruben, I never got this question for a local database. Same question then, what is the impact when connectivity is lost to any database?
Bert Vandenberghe [SLC] [DevOps Enabler] commented

Hi Steve,
When the connectivity to the storage (self-managed database or STaaS) is lost, then your DataMiner System continues to run. All elements and services are still available, you can still access them, consult the real-time values and also do sets on them because everything is running in-memory. You can even run automation scripts on them. Also, alarms will be generated and visible in the alarm console. So, you can still perfectly access Cube or the web apps to manage all your elements and services.
What is not available/possible? You won't be able to access history alarms and trending, because this requires access to the storage. Also restarting an element (or a DataMiner Agent) is not possible because this also require access to the storage. And lastly, access to DOM objects will also be unavailable because of the storage connectivity issue.
Offloading to disk is by default limited to 10GB, but this is configurable, see: https://docs.dataminer.services/dataminer/Reference/Skyline_DataMiner_Folder/More_information_on_certain_files_and_folders/DB_xml.html#configuring-a-size-limit-for-file-offloads.
Let us know if you have any additional questions.
Bert
Steve Purcell [SLC] [DevOps Advocate] commented

Thank you Bert, that is what we were looking for..

Steve