SSIS vs Custom .Net Programs

SSIS

  1. Most SQL Server ETL processes involve Bulk Copy operations.  SSIS provides OLE DB and Native Client.  Both have a lot of Bulk Copy features implemented.  ADO.Net only has SQLBulkCopy.  It is the slowest, and not a lot of features are not implemented (ORDER hints).

.Net Programs

  1. It is very difficult to debug SSIS packages.
  2. It is a big deal to change data types in SSIS packages.

 

Reference:

  1. The Data Loading Performance Guide

…similar bulk load techniques are supplied by programming interfaces to SQL Server, including the SQLBulkCopy class in ADO.NET, IRowsetFastload in OLE DB, and the SQL Server Native Client ODBC library…

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