What is a Cloudlet?
At CirrusGrid Platform, consumed by container resources are measured in cloudlets – a special measurement unit, which includes 128 MiB of RAM and 400 MHz of CPU power simultaneously.
Being highly granular, it allows to accurately determine the required capacity for each server in environment, which ensures the truly fair usage-based pricing so you do not overpay for the unused resources.
Note: that in contrast to RAM consumption (with MiB=1024 KiB unit), usage of disk space and network traffic is measured in megabytes (1000 KB).
Below, we’ll consider which types of cloudlet are used at CirrusGrid, how the cloudlet consumption is calculated and where to track your resource usage.
There are two types of cloudlet at CirrusGrid, available to be setup for every server in environment via the Vertical Scaling per Node topology wizard section: Reserved and Dynamic.
Herewith, if a layer contains multiple nodes, these limits are configured for all of them at once, i.e. are stated equal for each instance.
Here, each toddler corresponds to a particular cloudlet type:
In order to gain the maximum profit, it is recommended to use Dynamic Cloudlets alongside with the Reserved Cloudlets to get all the advantages of your application’s automatic vertical scaling and, simultaneously, to benefit on automatic discounts.
Number of used cloudlets is calculated on hourly basis in the following way:
The greater of these values (but not both of them combined) is considered as the actual environment consumption, which will be charged from your account according to the provider’s tariff (check it within Quotas & Pricing information frame).
For example, if during one hour your average CPU usage is 2400 MHz (6 cloudlets), and your highest RAM usage is 1024 MiB (8 cloudlets), you’ll be charged for 8 cloudlets only – not for the combined total of 14 units.
The current resource usage of your environment in general and for every layer/node it comprises in particular can be seen within the corresponding Usage column at dashboard:
And in order to review your servers’ consumption level for a particular period of time, you can use the corresponding Statistics section or check the applied account charges within your Billing History.
To get to know more about CirrusGrid pricing model and how to benefit on all the advantages it provides, read the corresponding docs:
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