Delta update support


If you are using Mender Professional or Mender Enterprise, you have access to robust delta updates. In this section we describe how to enable support for delta updates on your devices, by installing the mender-binary-delta Update Module with your Yocto Project build.

Once your devices support installing delta updates, see Create a Delta update Artifact for a tutorial on how to create a delta update from two Operating System updates.


In order to use delta update, you must be using a read-only root filesystem. For details on how to enable this, see the Read only root filesystem section.


Download the mender-binary-delta binaries following the instructions.

Integrate mender-binary-delta into the Yocto environment

Add meta-mender-commerical layer to your Yocto environment:

bitbake-layers add-layer ../sources/meta-mender/meta-mender-commercial

Add the following your local.conf to include mender-binary-delta in your build:

cat <<EOF >> conf/local.conf
# Customizations for Mender delta-update support

IMAGE_INSTALL:append = " mender-binary-delta"
LICENSE_FLAGS_ACCEPTED:append = " commercial_mender-yocto-layer-license"
SRC_URI:pn-mender-binary-delta = "file://${HOME}/mender-binary-delta-1.5.0.tar.xz"


If you are using a Yocto branch older than kirkstone, such as dunfell or older, you need slightly altered steps to use mender-binary-delta. See the mender-binary-delta section on Mender Hub for more information about this.

Next steps

For information on how to create delta update Artifacts, see Create a Delta update Artifact.

For more information about delta updates, including how to deploy them, as well as troubleshooting, see the Mender Hub page about mender-binary-delta.

We welcome contributions to improve this documentation. To submit a change, use the Edit link at the top of the page or email us at .