RAM & CPU #
RAM & CPU are measured in a CirrusGrid resource unit called a Cloudlet. A Cloudlet is roughly equivalent to 128 MiB RAM and 400MHz CPU.
Resources are charged on an hourly basis:
- RAM usage: the peak RAM usage over the hour
- CPU usage: the average CPU usage over the hour
When calculating your cloudlet usage, we only consider the larger of RAM or CPU usage each hour (not both combined). E.g. if during one hour your average CPU usage is 2400MHz (6 cloudlets), and your peak RAM usage is 1024MiB (8 cloudlets), you pay for 8 cloudlets – not the combined total (14 cloudlets).

There are two types of cloudlets: reserved and dynamic.
Reserved cloudlets are reserved in advance (using the topology wizard).
Dynamic cloudlets are scaled dynamically for your application.