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1E 23.11 (SaaS)

Content Distribution fundamentals

An overview of the fundamental concepts and terminology needed to understand what Content Distribution will do for you.

What is Nomad?

Nomad removes the need for distributed servers and intelligently uses only available bandwidth for all content distribution, so the business is never impacted by Configuration Manager or Windows deployments.

Nomad uses Configuration Manager console extensions to enhance the Configuration Manager Admin console, so you can configure Nomad settings, pause and resume Nomad downloads, use Nomad pre-caching and create baseline configuration items. By integrating with your OSD strategies Nomad maximizes the efficiency of distributing large OS content across the network. It does this by providing a number of Task Sequence steps that can be integrated directly into your OSD Task Sequences. Nomad also supports content distribution for Configuration Manager and Tachyon with the 1E Client.

A new Tachyon Platform component, called 1E Content Distribution, provides support for a number of Nomad features such as Single Site Download. Nomad clients send information back to Content Distribution related to the Nomad features and the performance of Nomad. Content Distribution is a replacement for ActiveEfficiency used in earlier versions of Nomad.

In addition, with the Tachyon Platform there is the new Nomad app replacing the Configuration Manager Nomad Dashboard. The Nomad app provides a high level view of the current status of content throughout the entire network.

The picture opposite shows the high-level relationship between the Nomad components listed in the Nomad components table.

Nomad components

Nomad component



1E Client

The 1E Client, includes the Nomad module which supports content distribution for Configuration Manager and Tachyon. The 1E Client includes other features and modules which are optionally enabled and configured, including:

The 1E Client is installed on each Windows device as a service, and the 1E Client Deployment Assistant (CDA) can be used with Configuration Manager to deploy it.

Tachyon Platform

Nomad app

The Nomad app provides visibility of content distribution activity and cache status for content distributed by both Nomad and Delivery Optimization.

The Nomad app is installed through 1E Server Setup. After installation the Nomad app is available on the Tachyon Platform portal homepage and can be accessed using the Tachyon DNS Alias FQDN. For example:1E Server Setup


Tachyon Platform

1E Client

1E Content Distribution

Content Distribution is a Tachyon Consumer providing control and visibility on content deployments and delivery and is installed through 1E Server Setup.1E Server Setup

Content Distribution offers visibility for the following via the Nomad app:

  • The status of all deployments, including both delivery and execution of content

  • The effectiveness of Peer to Peer technologies like Delivery Optimization (DO), Nomad and BranchCache

  • Historical trends like Peer to Peer effectiveness

  • Where content is located or cached by a Peer to Peer technology.

Tachyon Platform

Configuration Manager

Background Channel 1E Architecture

The Background Channel is a Introducing 1E component which provides a means for the Nomad module of the 1E Client to retrieve large data items from Tachyon without loading the Tachyon Switch:Introducing 1E

  • Stores Tachyon content provided by the Consumer API in the Background Channel for Tachyon clients to retrieve

  • Responds to Tachyon clients retrieving Tachyon content from the Background Channel.

Tachyon Platform

Configuration Manager console extensions

The Nomad Configuration Manager console extensions are installed where its Console is installed. The extensions add the custom Task Sequence steps among other Configuration Manager console extensions.

The Nomad Configuration Manager console extensions provide the following capabilities in the Configuration Manager Console:

Configuration Manager capability


Configure Nomad settings

In software deployment and client settings policies associated with packages, applications and software updates.

Nomad Download Pause

Buttons to pause and resume Nomad downloads, monitoring report to view paused content.

Nomad Pre-caching

Menu item to start the Pre-cache Wizard, monitoring report to view pre-cached content.

Nomad Baseline wizard

Menu items to create and edit baseline configuration items.

The additional Nomad attributes are configured through the Configuration Manager console using custom console extensions. These add properties pages to the standard package, task sequence and client settings dialog boxes and wizards.

Configuration Manager

Nomad OSD Tools

Nomad OSD Tools are required for integrating Nomad with OSD task sequences in Configuration Manager. The tools are installed on the CM Site server(s) and SMSProvider server(s) and install the Nomad files that get injected into a boot image.

Configuration Manager

Nomad download monitor

The Nomad Download Monitor tool is useful for administrators to view the status of downloads on local and remote Nomad client devices. The tool is required only for testing and troubleshooting on selected devices, and is not required or recommended for general deployment.


Nomad scripts

Sample PowerShell scripts for populating the Content Distribution database to support the following Nomad features:

Located in the zip's Scripts folder.

Configuration Manager

1E Nomad Task Sequence steps

Nomad can integrate with OSD to maximize the efficiency of distributing large OS content across the network. The three areas where Nomad integrates with OSD are:

  • WinPE support – providing Nomad functionality when imaging a device

  • Custom task sequence actions – enabling Nomad functionality to be integrated directly into OSD task sequences

  • Configuring PBA hosts – enabling Nomad functionality to be used during OSD to back up user files and settings (USMT data).

To support the above, Nomad provides a number of Task Sequence steps that can be integrated directly into your OSD Task Sequences:

Configuration Manager

Distributing software with Nomad and Configuration Manager

Nomad integrates with the Configuration Manager (CM) client content download process. When Nomad is installed, it registers with the Configuration Manager client as an Alternate Content Provider (ACP), which means the CM client will use Nomad as an alternative to BITS when it requires content if Nomad is enabled for the requested content object. Nomad can be enabled on individual packages (including Driver Packages, Operating System Images, Operating System Upgrade Packages and Boot Images) and Task Sequences.

For Applications and Software Updates, Nomad is enabled on each client for all Applications and Software Updates through Default Client Settings. When the CM client requires Nomad-enabled content, it passes a request to Nomad, which in turn downloads the content, places it in the CM client cache and passes back to the CM client for execution. The 1E Client (with Nomad client module enabled) must be installed on all CM client machines and on all Distribution Points (DP).

Bandwidth Protection

Nomad dynamically analyzes the overall WAN traffic to ensure that it only uses a percentage of the total. It is also aware of mobile devices and knows the difference between wireless and wired connections and is able to select the most efficient available connection to use.

Download once to branch

Nomad ensures that software packages are only ever copied once per branch over the WAN, utilizing local computers as temporary file caches to distribute the software locally. This reduces the bandwidth required for delivering software updates and means that small offices or sites connected by poor network links can receive software updates more reliably.

The Nomad clients with local copies of the package can themselves act as the master if the need arises. This significantly reduces the number of Configuration Manager servers required to manage a Configuration Manager hierarchy, thereby reducing initial and ongoing maintenance costs.

Nomad master elections
Download resumption and consistency checking

To minimize repeated downloads of the same content from the Distribution Point, Nomad supports download resumption and consistency checking.

Download resumption

Nomad downloads include checkpoint recovery, so if the connection to the distribution point is disrupted during a download, it is resumed when the connection is next available. Download resumption starts from the point it had reached when the connection was lost. This means that no previous time spent downloading the package is wasted.

Consistency checking

Nomad must be installed on all the Configuration Manager DPs. This not only lets central multicast work, but also enables package file checksums to be calculated centrally allowing efficient recovery from file transfer issues if one exists. The central creation of the checksums also minimizes the computational overhead.

Nomad uses manifest files to describe the download contents of Configuration Manager applications and packages. This enables it to provide file-level transfer and, when integrated with Configuration Manager remote differential compression (RDC), file delta downloads. The Nomad client automatically generates a manifest for each version of each package. The generation request occurs as the first Nomad client attempts to download the newest version of a package.

Nomad cache

An overview of the Nomad cache including different methods used by Nomad peers to access the cache on the elected master. The Nomad cache is essential to Nomad's download once to branch feature. The cache enables Nomad to hold its downloaded content so that it can be distributed locally to other Nomad peers. The Nomad cache contains downloaded content (such as packages, applications, and software updates) which can vary in size from relative small patches to rather large OS image files.

Cache management

The downloaded content in the Nomad cache consume disk space, therefore management of the cache is critical. Because files may be re-used and distributed to other devices on the same subnet or site, the simple solution of deleting the files as soon as they have finished downloading and executing is not sufficient. Instead, Nomad has a cache cleaner utility that automatically but intelligently maintains control over the cache's disk usage.

Peer copy over HTTP or HTTPS

Nomad peer-to-peer content transfer uses SMB by default, which requires File and Print services to be enabled in order for it to share the content. For better security Nomad can be configured to use HTTP or HTTPS for peer-to-peer content transfer, removing the requirement for file shares. When Nomad is configured to use HTTP/S, if Peer Backup Assistant is enabled it will also use HTTP/S.

The Nomad share

The Nomad cache is configured as a share that enables peer-to-peer distribution of downloaded content. Nomad provides control over the accounts that have access to the share and also provides an advanced Nomad FanOut mechanism that can overcome the connection limit to shares on workstations to ensure that content is distributed efficiently and securely.

Remote differential compression (RDC) integration

Not only is Nomad aware of the file level differences between different versions of a package so that only changed files are downloaded, it is also aware of the differences within individual files, refer to File-level delta downloads for details.

In our example, a package that has been previously downloaded has one of its files updated. Nomad compares the Configuration Manager RDC signature file (where each block in the file is given a number that identifies it according to its contents) for the new version of the file and the one before it. By identifying the changes, Nomad is able to download just the file blocks containing the differences.

Efficient file updates
Nomad app

The Nomad app provides visibility of content distribution activity and cache status for content distributed by both Nomad and Delivery Optimization. This includes Configuration Manager content distributed with Nomad and Software Updates content distributed with either Nomad or Delivery Optimization.

Content Distribution

1E Content Distribution is a Tachyon Consumer, providing control and visibility on content deployments and delivery in an organization.

Support for IPv4 and IPv6

Nomad supports IPv4 by default, and optionally supports IPv6, which is commonly required when clients connect to the corporate network using the DirectAccess.

App-V support

Nomad supports application virtualization (App-V) applications which are deployed as streamed content by Configuration Manager.

FIPS compliant communication encryption

Nomad has always provided encryption for most of its communications and uses an advanced FIPS compliant encryption algorithm. The United States Federal Information Processing Standard (FIPS) is a standard that defines security requirements for software used by the U.S. federal government. It stipulates that applications that encrypt any sensitive data should use only a certain set of approved encryption algorithms.

Nomad Pre-caching

Pre-caching lets you preload the Nomad caches of particular machines directly from the Configuration Manager console. This enables downloads to be available on the branch prior to a deployment taking place, which can be very useful in large-scale deployment scenarios.

Nomad FanOut

Windows imposes a limit on the number of concurrent connections on the Nomad share. The FanOut featurecompensates for this limitation by enabling any peer that has more content than the requester to respond to the FanOut request. It is not limited to peers that have an active connection to the master.

Single-site download - SSD

Nomad's Single Site Download (SSD) feature ensures a download across the WAN only happens once per site. It does this by maintaining information about which subnets are neighbors of each other (accessible on LAN rather than WAN), so that when an elected master considers a download from a DP rather than a peer in its subnet, it can discover which other local subnets already has the package. These subnets are typically at a single customer site, specifically a single geographical location.

Nomad SSD uses Content Distribution. When a Nomad client downloads a package, it registers this information with Content Distribution, enabling a profile to be created on which Nomad clients hold particular packages.

Peer Backup Assistant - PBA

The Peer Backup Assistant (PBA) feature enables files and settings data to be backed-up to a peer device so that they can be maintained when the device is being migrated to a new Operating System. Using PBA, you can avoid the cost of State Migration Point servers to hold the backup data, as peer devices can be used to provide this storage. The risk of losing user data through the migration process is also greatly reduced in the process.

Single Site Peer Backup Assistant - SSPBA

Peer Backup Assistant (PBA) enables Nomad clients to use local storage on peers to temporarily store user state data during an OS deployment, removing the need for Configuration Manager State Migration Points. By default, it uses network broadcasts to identify peers with available storage on the local subnet. Single Site Peer Backup Assistant (SSPBA) uses Single Site Download (SSD) features to enable Nomad to use storage available on PBA hosts in adjacent subnets. This enables you to:

  • Designate appropriate devices to provide the Nomad PBA data store for all devices on the site, not just the local subnet

  • Avoid the issue where clients on particular subnets do not have sufficient disk space to offer the role of a Nomad PBA data store.

Support for Software Updates
Deploying Office 365 updates

Configuration Manager introduced support for Office 365 agents in Current Branch 1602, and Nomad introduced support in version 6.1.100. This section describes how Office 365 deployments differ in terms of ACP requirements and goes on to describe how Nomad behaves during the download.

Windows 10 Express Installation Files and Delta Content for Updates

As Windows 10 cumulative updates get very big, very quickly (often in excess of 1GB a few months after any given Feature Upgrade), Microsoft started publishing express installation files for these updates in addition to the traditional full update files. Configuration Manager introduced support for Windows 10 Express Installation File updates in Current Branch 1802 hotfix KB4163547.

Express installation files are a much larger payload on the Distribution Point compared to traditional software update files, but the feature enables clients to download delta byte-ranges from these files, so each month the amount of data a client has to download is typically much smaller. Configuration Manager Current Branch can be configured to support express installation files (refer to for more details).

With the release of Windows 10 1809, Microsoft replaced express update files with a new way of managing deltas within software updates. In Configuration Manager 1902 the Enable installation of Express installation files on clients option in Software Update Client Settings was replaced with Allow clients to download delta content when available.


Nomad supports the download of Express installation files and delta content for updates.

Downloading content for CM Software Updates from Microsoft Update

This feature enables Nomad to download content from Windows Update / Microsoft Update (WUMU). Starting in CB version 1806, software updates can be deployed to devices without first downloading and distributing content to Distribution Points, instead clients download updates directly from the cloud.

Integrating Nomad with WakeUp


Nomad integration with WakeUp is deprecated from 1E platform v23.11

Nomad integration with WakeUp enables Nomad to share content from its devices that are holding particular content, even if those devices are offline. One reason why peers in the local subnet may not respond to the request even though they have content in their caches is that they are offline (shutdown, in hibernate or sleep mode). However, if WakeUp is integrated, the Nomad client would know which offline device has the content and can wake it up when it queried Content Distribution.

The wake up list is maintained by Content Distribution and is the same list that Single Site Download (SSD) uses. Separate lists of peers are returned for subnet and site. This feature requires Nomad SSD to be enabled, Content Distribution and a NightWatchman infrastructure. The feature is enabled during installation of PreparationNightWatchman Management Center. Please refer to Nomad Preparation for requirements.

OS deployment task sequences

Nomad can integrate with OSD strategies to maximize the efficiency of distributing large OS content across the network. It does this by providing a number of Task Sequence steps that can be integrated directly into your OSD Task Sequences.

Nomad Download Monitor

The Nomad Download Monitor tool (also known as NomadBranchGUI) is useful for administrators for troubleshooting downloads as they view the status of downloads on local and remote Nomad client devices.

Cloud Support
Nomad Baseline Wizard

The Nomad Baseline wizard is used to create a Configuration Manager (CM) Baseline from the Configuration Manager console for settings related to Nomad.

Nomad Download Pause

Nomad integrates with Tachyon to enable pausing or resuming Nomad downloads throughout the estate. This feature provides a safety measure for situations when a faulty or harmful deployment is made by mistake. In such situations, pausing Nomad downloads on all targeted devices can prevent or limit the potential damage.

It can also be used to facilitate troubleshooting, making it possible to pause all Nomad downloads across the network and enable IT teams to eliminate content distribution from their assessment of network bandwidth usage.