FAQs¶
FAQs for Data Subscription of EnOS Cloud¶
Q: What is the difference between the Basic Alert and the Advanced Alert?¶
A: Difference between the two is corresponding to the difference of the message queue Topic for subscription consumption, the message queue for basic alert subscription is ALARM_RULE_ENGINE_OUTPUT, and the message queue for advanced alert subscription is ALERT_ENGINE_SUBSCRIBE_TOPIC, advanced alert is compatible with basic alert.
Q: How many data subscription jobs can be created for an organization?¶
A: Currently, an organization can have at most 15 data subscription jobs.
Q: How many consumer groups are supported for a data subscription job? How many consumers are supported in a consumer group?¶
A: The number of consumer groups for a data subscription job is not limited, but a consumer group allows 2 consumers to consume to subscribed data at the same time.
Q: How long will subscribed real-time asset data be stored in Kafka topics?¶
A: By default, subscribed data will be stored in Kafka topics for 3 days. In case the data consumption stops temporarily, you can continue consuming the subscribed data within 3 days after the real-time data is subscribed.
FAQs for Data Subscription of EnOS Edge¶
Q: How many data subscription jobs can be created for an APP?¶
A: Currently, an APP can have at most 5 data subscription jobs.
Q: Which kinds of data subscription jobs can be created?¶
A: Time series data subscription, alert data subscription, Edge device event subscription and the results subscription of the control command.
Q: Which kinds of programming language can be used for EnOS Edge data subscription?¶
A: Java, Go and C.
Q: How to view the created data subscription jobs on the Edge device?¶
A: Here are two methods:
- Go to Edge Details > Applications, and click View Subscription.
- Go to Edge Details > Data Subscription. Search for the data subscription job using the SA filter.