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API
Application Programming Interface.
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An artifact is a deployable unit that is supported by a specific cartridge type (e.g., a PHP file in a PHP cartridge, a web app (.war) in an Application Server Cartridge).
Auto-scaling policy
An auto-scaling policy is a policy that determines the auto-scaling process, based on the load thresholds. The load thresholds in turn are determined based on the requests in flight, memory consumption and load average.
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An availability zone is a isolated location within a region used to define one or more partitions. Thereby, availability zones provide physical separation (not geographical separation) and redundancy.
Cartridge
A cartridge is a container for an application, framework or data management system that could be deployed in a platform as a service (PaaS) for scalability. In WSO2 Private PaaS, service runtimes are creating by cartridge runtimes. For example, if you want to have a PHP runtime, you can use a PHP cartridge to get the runtime to deploy your PHP application.
Cartridge Agent
Cartridge Agent is a component that resides within a cartridge instance and handles the communication between the cartridge and WSO2 Private PaaS.
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Deployment synchronization
Deployment Synchronization is the process of synchronizing the deployed artifacts, which are in the remote Git repository, with the relevant cartridge instances.
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A network partition is a network bounded area in a IaaS, where private IPs can be used for communication. Network partitions are also referred to as partition groups. The partition algorithm that is applied within a network partition may differ from the partition algorithm that is applied between different network partitions.
Partition
A partition depicts the division in an IaaS. A partition can be made at one of the following levels: provider level, region level or zone level. A partition should at least have a provider defined. The Auto-scaler makes decisions based on the defined partitions. The partitions are defined in the partitions.json file in the registry. The partitions.json file contains configurations on sample partitions.
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