Basics of Data Flow Task:
* Streaming
* Unlink control flow, multiple components can process data at the same time
* Smallest unit of the data flow is a component
* Data flows move data, but are also tasks in the control flow, as such, their success or failure effects how your control flow operates
* Data is moved and manipulated through transformations
* Data is passed between each component in the data flow
* Data flow is made up of source(s), transformations, and destinations.
Some Facts about Data Flow:
* The data flow task in SSIS (SQL Server Integration Services) sends data in series of buffers.
* This is bounded by DefaultBufferMaxRows and DefaultBufferMaxSize, two Data Flow properties.
* They have default values of 10,000 and 10,485,760 (10 MB), respectively. That means, one buffer will contain either 10,000 rows or 10 MB of data, whichever is less.
* You can adjust these two properties based on your scenario. Setting them to a higher value can boost performance, but only as long as all buffers fit in memory.
* The Data Flow task encapsulates the data flow engine that moves data between sources and destinations, and lets the user transform, clean, and modify data as it is moved.
* Addition of a Data Flow task to a package control flow makes it possible for the package to extract, transform, and load data.
* A data flow consists of at least one data flow component, but it is typically a set of connected data flow components: sources that extract data; transformations that modify, route, or summarize data; and destinations that load data. Components are connected in the data flow by paths.
* Each path specifies the two components that are the start and the end of the path. For more information, see Data Flow Elements.
* At run time, the Data Flow task builds an execution plan from the data flow, and the data flow engine executes the plan.
* We can create a Data Flow task that has no data flow, but the task executes only if it includes at least one data flow.
* Streaming
* Unlink control flow, multiple components can process data at the same time
* Smallest unit of the data flow is a component
* Data flows move data, but are also tasks in the control flow, as such, their success or failure effects how your control flow operates
* Data is moved and manipulated through transformations
* Data is passed between each component in the data flow
* Data flow is made up of source(s), transformations, and destinations.
Some Facts about Data Flow:
* The data flow task in SSIS (SQL Server Integration Services) sends data in series of buffers.
* This is bounded by DefaultBufferMaxRows and DefaultBufferMaxSize, two Data Flow properties.
* They have default values of 10,000 and 10,485,760 (10 MB), respectively. That means, one buffer will contain either 10,000 rows or 10 MB of data, whichever is less.
* You can adjust these two properties based on your scenario. Setting them to a higher value can boost performance, but only as long as all buffers fit in memory.
* The Data Flow task encapsulates the data flow engine that moves data between sources and destinations, and lets the user transform, clean, and modify data as it is moved.
* Addition of a Data Flow task to a package control flow makes it possible for the package to extract, transform, and load data.
* A data flow consists of at least one data flow component, but it is typically a set of connected data flow components: sources that extract data; transformations that modify, route, or summarize data; and destinations that load data. Components are connected in the data flow by paths.
* Each path specifies the two components that are the start and the end of the path. For more information, see Data Flow Elements.
* At run time, the Data Flow task builds an execution plan from the data flow, and the data flow engine executes the plan.
* We can create a Data Flow task that has no data flow, but the task executes only if it includes at least one data flow.
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