About updating a virtual software layer
|Article:HOWTO50157|||||Created: 2011-04-18|||||Updated: 2011-09-26|||||Article URL http://www.symantec.com/docs/HOWTO50157|
After you create a virtual software layer, you can update the layer with an update or patch. Before you update an existing layer, you should first decide whether the update warrants creating a new layer. If you create a new layer, you must reapply any edits that you applied to the existing layer.
Before you update an existing layer, you must also decide whether to update its writeable or read-only sublayers. An application's writeable sublayer is updated when the update runs on a computer where the application layer is activated. The major disadvantage of updating the writeable sublayer is that the update is lost if the layer is reset. The major advantage of updating the writeable sublayer is that it preserves user-specific settings in the writeable sublayer.
To update a layer's read-only, you must use the SWV Admin tool. You use this tool to capture the update into the existing layer. The major disadvantage of updating the read-only sublayer is that any user-specific settings in the writable sublayer are lost. The major advantage of updating the read-only sublayer is that you can ensure that all users have an identical version of the application.
Before you update the read-only sublayer of an application, you should change the layer's name and GUID. You can then import the updated layer on a computer without deleting the original layer. If the updated layer causes problems, you can then quickly deactivate it and activate the original layer. To change the GUID of a layer, use the SETGUID SVSCMD command-line parameter.
Article URL http://www.symantec.com/docs/HOWTO50157