Scaling Catwalks in GCP

Question:

How is the scaling configured in GCP? How does the scaling of Catwalks work? What are the KPIs (CPU usage, load, ...?) used to determine if there needs to be a scaling? What are the reaction-times we can expect?

Answer:

In general we use Google's autoscaling group feature.

Currently, we use the CPU usage as a scaling factor as we made the best experience with that context in mind but we are aware that this might differ in the future, so our rolling-update script allows to parameterize those settings per customer.

As threshold, so that enough instances are available in load scenarios, we identified a value between 70-80%. 

At the moment we use high CPU, normal RAM instances (4 vCPUs, 3,6 GB - n1-highcpu-4) because in the current scenarios Frontastic needs more computing power than memory. So we also allow this to be customized per customer. 


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