App Layering

What’s new in App Layering 4.12

Release date: July 17, 2018

This release includes the following features and improvements.

  • Support for Windows 10, version 1803: Support for Windows 10, version 1803 is now available.

  • App Layering and Citrix UPM profile streaming: App Layering handling of User Profile Management (UPM) and profile streaming have been improved.

  • Performance improvements when packaging App layers using VMware: The connector cache for VMware connector configurations now allows the appliance to reuse its packaging disks when adding new versions to layers. This can significantly reduce the time it takes to add a new version to a layer. Please set the packaging cache size in your vSphere connector configurations.

  • Packaging cache size for all connector configurations: The Packaging cache size for all connector configurations now defaults to an appropriate starting size for your hypervisor. The Hit rate, indicates how well the cache is working, so you can adjust the cache size to improve layering performance. For details, click here.

Labs features in this release

Labs features are previews of potential functionality for future releases. While a feature is in Labs, do not use it in production. There is no guarantee that a Labs feature will become part of the product, nor that the feature will work as originally designed if and when it is released.

The Labs features available in this release include the following:

  • Full User Layer: User layers let you persist user profile settings, data, and user-installed applications in non-persistent VDI environments. This feature is supported in Windows 7 64-bit and Windows 10 64-bit environments.

  • App layers can be assigned as elastic layers on layered images that use a different OS layer: Until now, Elastic layer assignments required that the app layer assigned use the same OS layer that was used to create the App layer. Now you can try assigning an app layer as an Elastic layer on a layered image that uses a different OS layer.


    There is no guarantee that an App layer can work on a different OS layer than the one used to create it. If there are issues, you can disable this feature and allow the app layer to be used only with the OS that you used to create the layer.

To use a Labs feature, enable it first.

Supported platforms

For information about platforms supported by Citrix App Layering, see System requirements.

Upgrade path

For the latest fixes and features, including compatibility with other software packages that you use, we encourage you to stay current with the App Layering upgrades.

If you have chosen to stay on a version of the App Layering product released before version 19.1, see the Upgrade article for the upgrade path and the download link for the version to which you are upgrading.

What’s new in App Layering 4.12