SSIS architecture consists of four key parts:
a) Integration Services service: monitors running Integration Services packages and manages the storage of packages.
b) Integration Services object model: includes managed API for accessing Integration Services tools, command-line utilities, and custom applications.
c) Integration Services runtime and run-time executables: it saves the layout of packages, runs packages, and provides support for logging, breakpoints, configuration, connections, and transactions. The Integration Services run-time executables are the package, containers, tasks, and event handlers that Integration Services includes, and custom tasks.
d) Data flow engine: provides the in-memory buffers that move data from source to destination.
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