1. A good SSIS package design will be repeatable. If you find yourself adding new tasks and data flow exceptions to your packages, you need to stop and reevaluate the original layout. One SSIS project will have several “templates” that are reused without a single design change for the life of the data warehouse. You should only have one or two template variations for each of these areas:
2. Plan for restartability. As of SQL 2014, SSIS checkpoint files still did not work with sequence containers. (The whole sequence container will restart including successfully completed tasks.) The solution is to build Restartability into your ABC framework.
3. Verify your ETL process. Just because your ETL finished without error – or you successfully handled your errors, doesn’t necessarily mean the SUM() of SourceSystemNet equals the SUM() of SSAScubeNet. Use your verification process this way.
a. It should be the final step of your ETL / ELT process
b. It should confirm that strategic SUM() and row COUNT() are accurate
c. It should report on dropped rows discarded during the ETL from an INNER JOIN or WHERE clause
d. It should automatically send emails of errors that have been allowed to “report and pass”.
4. Collect Metadata! Audit, balance and control (ABC) should be planned for and implemented from the very first day. You should store this ABC data in a separate SQL Server database, and at any point in time be able to determine the following:
5. Trap for Errors both through On Error events and through precedence constraints. There are two types of errors to successfully handle in an ETL / ELT process
For a full list of MS BI Best practices, download the following file:
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