Export (0) Print
Expand All

Cache Connection Manager

The Cache connection manager reads data from the Cache transform or from a cache file (.caw), and can save the data to a cache file. Whether you configure the Cache connection manager to use a cache file, the data is always stored in memory.

The Cache Transform transformation writes data from a connected data source in the data flow to a Cache connection manager. The Lookup transformation in a package performs lookups on the data.

NoteNote

The Cache connection manager does not support the Binary Large Object (BLOB) data types DT_TEXT, DT_NTEXT, and DT_IMAGE. If the reference dataset contains a BLOB data type, the component will fail when you run the package. You can use the Cache Connection Manager Editor to modify column data types. For more information, see Cache Connection Manager Editor.

NoteNote

The protection level of the package does not apply to the cache file. If the cache file contains sensitive information, use an access control list (ACL) to restrict access to the location or folder in which you store the file. You should enable access only to certain accounts. For more information, see Controlling Access to Files Used by Packages.

You can configure the Cache connection manager in the following ways:

  • Indicate whether to use a cache file.

    If you configure the cache connection manager to use a cache file, the connection manager will do one of the following actions:

    • Save data to the file when a Cache Transform transformation is configured to write data from a data source in the data flow to the Cache connection manager.

    • Read data from the cache file.

    For more information, see Cache Transform.

  • Change metadata for the columns stored in the cache.

  • Update the cache file name at runtime by using an expression to set the ConnectionString property. For more information, see Using Property Expressions in Packages.

You can set properties through Integration Services Designer or programmatically.

For more information about the properties that you can set in Integration Services Designer, see Cache Connection Manager Editor.

For information about how to configure a connection manager programmatically, see ConnectionManager and Adding Connections Programmatically.

Integration Services icon (small) Stay Up to Date with Integration Services

For the latest downloads, articles, samples, and videos from Microsoft, as well as selected solutions from the community, visit the Integration Services page on MSDN or TechNet:

For automatic notification of these updates, subscribe to the RSS feeds available on the page.

Was this page helpful?
(1500 characters remaining)
Thank you for your feedback

Community Additions

ADD
Show:
© 2014 Microsoft