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In the context of cloud computing, the main difference between workflow automation and orchestration is that workflows are processed and completed as processes within a single domain for automation purposes, whereas orchestration includes a workflow and provides a directed action towards larger goals and objectives. [2]
The involved SOA 2.0 services do not know (and do not need to know) that they are part of a composition or a higher business process. Only the central coordinator of the orchestration knows this, so the orchestration is centralized with explicit definitions of operations and the order of invocation of SOA 2.0 services.
Topology and Orchestration Specification for Cloud Applications (TOSCA) is an OASIS standard language to describe a topology of cloud based web services, their components, relationships, and the processes that manage them. [1] The TOSCA standard includes specifications of a file archive format called CSAR.
Conductor is a free and open-source microservice orchestration software platform originally developed by Netflix. [1] [2]Conductor was developed by Netflix to solve the problems of orchestrating microservices and business processes at scale in a cloud native environment. [3]
According to the National Institute of Standards and Technology, Information Technology Laboratory, “Cloud computing is a model for enabling convenient, on-demand network access to a shared pool of configurable computing resources (e.g., networks, servers, storage, applications, and services) that can be rapidly provisioned and released with minimal management effort or service provider ...
Services are independent and control the functionality they encapsulate, from a Design-time and a run-time perspective. Service statelessness Services are stateless, that is either return the requested value or give an exception hence minimizing resource use. Service granularity A principle to ensure services have an adequate size and scope.
All customer services communicate in the same way with the ESB: the ESB translates a message to the correct message type and sends the message to the correct consumer service. An enterprise service bus (ESB) implements a communication system between mutually interacting software applications in a service-oriented architecture (SOA).
Cloud computing disperses applications and services among multiple servers and, in some cases, multiple data centers. Cloud orchestration coordinates the different cloud elements to ensure systems and applications management, integration, support, billing, provisioning, service-level agreement management and contract management.