CirrusGrid PaaS provides a versatile pricing model, that can be adjusted to meet the requirements of the most demanding customers due to the number of awesome features:
In contrast to the majority of other vendors, all of these features allow CirrusGrid to provide a truly user-oriented Pay-per-Use charging approach:
The video below will help you to catch the key points of CirrusGrid pricing system flexibility and the problems it helps to solve:
With automatic scaling you don’t need to guess or predict the incoming load. The platform will automatically adjust the amount of allocated to environment resources (within the stated scaling diapason) according to its current requirements.
The Scaling Limit sets a maximum number of cloudlets that can be allocated for each server, so you can use it to define a maximum possible budget for your project. Subsequently, cloudlets will be automatically added to your servers based on application resource consumption. These are called Dynamic Cloudlets because they’re dynamically added (as your resource usage increases) and removed (as your resource usage decreases). So, you pay based on the actual hourly usage.
Since most applications need a certain amount of resources just to be loaded and ready to run, you’ll always consume a particular number of cloudlets regardless the load level. Therefore, you can allocate them beforehand with Reserved Cloudlets and benefit on automatic discounts.
These scaling ranges are configured individually for each server instance, so you can specify different limits for each container depending on your needs and preferences.
In order to apply such a usage-based pricing model to your environment, perform the following steps:
1. Set the Scaling Limit slider (the transparent one to the right) to your desired maximum resource limit
Warning: Setting Scaling Limit too low for highly-loaded applications may cause their instability.
Since usage is calculated hourly, your cloudlet (RAM & CPU) consumption can go up and down throughout the day depending on application needs – so you automatically pay a lower price when you’re using fewer resources (e.g. during low traffic periods), and only pay more when additional resources are really needed (e.g. during high traffic periods).
2. Set the Reserved Cloudlets slider (the left white-colored one) to the desired value in order to commit the minimum amount of RAM & CPU that you expect to always need and get the discount for them. The exact discount size can vary by hosting provider and the overall number of Reserved Cloudlets in your environment (i.e. their sum for all nodes).
In our example, the server has 4 Reserved cloudlets and a maximum limit of 24 Dynamic Cloudlets. With this configuration, the payment will be done as follows:
Combining the Reserved and Dynamic cloudlets usage enables you to save your costs whilst remain prepared for the unexpected surges in application demands. Such an approach allows to handle all of the incoming requests during load peaks, and, at the same time, not to overpay for the unused resources.
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