Myths and facts about cloud systems

Is the cloud supervision system information I see on my computer screen real time?

When communication media like 3G, 4G or Wi-Fi are used to bring data from devices to our system, either local or cloud-based, we need to be aware that the temperature information displayed on the computer screen is usually not up to date with the current value measured by the sensor. For instance, the temperature value was acquired, and it takes seconds, sometimes minutes, to travel through the communication media chosen and finally be displayed on the user screen. So, when talking about online supervision systems, we need to consider parameters like communication media, network latency and service availability to understand why online information are not as “online” as we might think.

Novus data loggers, like FieldLogger and LogBox Connect family, send data to the cloud with a timestamp to record the exact moment that data was read from the sensor. This way, users will know the time instant of the data displayed, which eliminates errors due to communication delays or failures.

Is the data saved in my data logger memory identical to the data in my Cloud system?

Data in a supervisory system can be presented in two ways:

The first way is with the data linked to the moment with reaches the cloud system, when the temperature value is read by the device and then sends to the supervisory system, for example. When receiving this data, the cloud system associates the receiving moment with the temperature information, being recorded this way.

The second way is when the device sends, along with the temperature value, the time at with that value was read from the sensor – that is, the timestamp related with the temperature data from the origin in the measurement device.

As previously mentioned, the Novus data loggers that send data to Novus cloud always send them already linked with a time or a timestamp. In this way, the existing data in the Novus cloud database is identical to the data that is in the device memory.

How much does it cost to have a supervisory system in the cloud?

In the cloud, instead of the hiring traditional methods used for local systems, the payment for the resources access is made on demand. Such models are known as SaaS (software as a service) IaaS (infrastructure as a service) and PaaS (platform as a service).

Currently, there are several types of cloud supervisory systems in the market: some for more dedicated applications and others with widest terms of functionality. Most of the time, they require specific implementations to leave the system as the client wants and that can generate additional costs. As the number of users or functions is changed, the value of the subscription paid to the service provider is automatically changed, adapting the supply to the demand for processing, connection and storage. Unlike local systems, where this equilibrium is due to a prediction that managers must make for the future; in the cloud, the company never spends more or less than the ideal.

(Excerpt) Read more Here | 2019-08-26 01:01:45
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