Advances, Systems and Applications
Table 1 Parameters of the cloud application context metamodel
Parameter Name | Description |
|---|---|
Resource usage profile: CPU usage | CPU utilisation, number of used vCPU cores |
Resource usage profile: RAM usage | RAM utilisation |
Resource usage profile: Network usage | Amount of ingress and egress network traffic, network incoming and outgoing byte rate |
Resource usage profile: Storage usage | Used storage capacity, read/write byte rates |
Application users: Concurrent users | Number of concurrent users of the application service in a given moment, defined by the initial user number and the user number distribution |
Application users: User Types | Various user types of the application service |
Infrastructure provider | One or more infrastructure providers, owning the infrastructure resources that are used as a deployment environment of the application service |
Resource properties: CPU properties | Properties related to CPU resources allocated to application service - vCPUs number, CPU frequency, etc. |
Resource properties: RAM properties | Properties related to RAM resources allocated to application service - the amount of RAM |
Resource properties: Network properties | Properties related to network resources allocated to application service - bandwidth, network ports throughput |
Resource properties: Storage properties | Properties related to storage resources allocated to application service - HDD or SSD disk, local or network storage |
Pricing model | Determines the way used resources are being charged, defined by infrastructure provider |
Pricing model: Resource price | Price of a specific resource defined by infrastructure provider based on the resource properties and usage metric, or unit of time |
Pricing model: Usage metric | Metric used by the infrastructure provider for billing (e.g., MB or GB can be used for measuring the consumption of network traffic). |
Pricing model: Chargeable resources | Part of the pricing model defining which resource usage will be charged |
Pricing model: Resource bundles | Defined groups of resources that are charged together, depending on the pricing model (e.g., RAM and CPU combination) |
Data centre location | Geographical location of the data centre |
Service Level Agreement | An agreement between the service provider and consumer defining service quality level through service level objectives |
Service Level Objective | Part of the service level agreement |