SYS-CON MEDIA Authors: Yeshim Deniz, Elizabeth White, Pat Romanski, Liz McMillan, William Schmarzo

Blog Feed Post

Citrix HDX Adaptive Transport Enhancements and Implications for Performance Monitoring

Citrix HDX MonitorStarting with Citrix XenApp and XenDesktop 7.13, Citrix has introduced a new technology called HDX Adaptive Transport. To the benefit of all that are considering upgrading to XenApp and XenDesktop 7.x or going through a new Citrix deployment, this blog will shed light on what adaptive transport is, why it was introduced, how it works, its benefits to Citrix customers, and why performance monitoring of adaptive transport is important.

What is HDX Adaptive Transport?

Adaptive transport is not to be confused with adaptive display, which is a graphics stack that makes use of automatic real-time decisions to apply video encoding for select portions of the screen with video content. On the other hand, adaptive transport is a protocol that is designed to transmit data quickly and more reliably. It does not change or replace HDX. It, actually, is the underlying transport protocol that carries and delivers HDX sessions to Citrix users over UDP or TCP. While TCP is, generally, the de facto choice for VDI content delivery, Citrix adaptive transport uses an enhanced version of UDP as the primary data transport protocol. This is called Enlightened Data Transport (EDT), and this works over UDP.

Citrix HDX Adaptive Transport

EDT was introduced in Citrix XenApp and XenDesktop 7.13 to overcome the shortfalls of environments that do not support TCP well. For example, on long-haul WAN connections where there is possibility of high latency and fluctuating bandwidth, EDT would be the preferred transport protocol over TCP. It improves data throughput for all ICA virtual channels including Thinwire display remoting, file transfer (Client Drive Mapping), printing, multimedia redirection and others. Given the faster and more stable performance it provides, starting from XenApp and XenDesktop 7.16, EDT has been made the default protocol for HDX content delivery.

Here are some findings from performance testing and benchmarking of HDX adaptive transport:

 Adaptive transport has been built with the intelligence to automatically understand network conditions and react to changes. By default, XenApp and XenDesktop now deliver HDX content via EDT. Based on a dynamic determination of conditions where TCP would perform better, or should the network not support UDP, or in the event of an EDT failure, the transport falls back from EDT to TCP automatically, in real time, ensuring seamless and uninterrupted session connectivity for the end-users. EDT will benefit any type of Citrix session – from sessions that are highly graphic-intensive or video-rich, to less intensive, standard desktop applications.


  • HDX adaptive transport is only supported on XenApp and XenDesktop 7.13 and later, and connections via StoreFront 3.8 and later
  • Adaptive transport is configured on the XenApp/XenDesktop VDA by applying the Citrix policy before it is available for communication between the VDA and Citrix Receiver. If adaptive transport setting is configured to “Preferred,” then the use of EDT vs. TCP will be driven by Receiver.
  • Framehawk is not supported on EDT as it uses its own UDP data transport layer.
Benefits to Users Accessing Citrix Sessions Over EDT
• Faster connectivity and performance on WAN
• Increased session reliability for end-users
• Automatic fallback to TCP ensures that there is no connection timeout

Performance Monitoring of HDX Adaptive Transport

As adaptive transport and EDT have become the standard data transport protocol for XenApp and XenDesktop, almost all Citrix sessions delivered through it. With such extensive customer impact, monitoring the performance of sessions that use EDT becomes important for Citrix administration teams. Before an end-user experiences a problem on an EDT session and complains, Citrix admins need to have the capability to continuously measure EDT performance and connectivity, and isolate bottlenecks for proactive troubleshooting.

Key EDT performance metrics include bandwidth, roundtrip time, congestion, packet retransmission, sent/received acknowledgements, and so on. While ICA channel insights (screen refresh latency, Framehawk, etc.) tell us about the real-time user experience that Citrix users encounter, EDT metrics indicate how fast and reliable the EDT transport has been for end-users. Citrix admins need visibility of these KPIs for each and every session running on EDT for end-to-end Citrix performance management.

Starting with v 6.3, eG Enterprise automatically discovers the sessions that are using EDT for transport and tracks EDT performance metrics for each of those sessions. This capability is supported both for Citrix XenApp and XenDesktop sessions.

EDT Performance Monitoring

EDT Performance Monitoring using eG Enterprise


References & Additional Reading:

The post Citrix HDX Adaptive Transport Enhancements and Implications for Performance Monitoring appeared first on eG Innovations.

Read the original blog entry...

More Stories By Vinod Mohan

Vinod Mohan is a Senior Product Marketing Manager for eG Innovations, a global provider of unified performance monitoring and root-cause diagnosis solutions for virtual, physical and cloud IT infrastructures. He has 10 years of experience in product, technology and solution marketing of IT software and services spanning application performance management, network, systems, virtualization, storage, IT security and IT service management (ITSM).

Previously, he was a Senior Product Marketing Manager at SolarWinds for server and application monitoring software. Now a key team member for eG Innovations, he is a contributing author for the eG Innovations blog, "Application & Virtualization Performance Insights", along with other trade publications including APMdigest, DABCC, Cyber Defense Magazine, IT Briefcase, Insfosec Island, The Hacker News, IT Pro Portal, and SolarWinds THWACK community.

Latest Stories
In his keynote at 19th Cloud Expo, Sheng Liang, co-founder and CEO of Rancher Labs, discussed the technological advances and new business opportunities created by the rapid adoption of containers. With the success of Amazon Web Services (AWS) and various open source technologies used to build private clouds, cloud computing has become an essential component of IT strategy. However, users continue to face challenges in implementing clouds, as older technologies evolve and newer ones like Docker c...
Crosscode Panoptics Automated Enterprise Architecture Software. Application Discovery and Dependency Mapping. Automatically generate a powerful enterprise-wide map of your organization's IT assets down to the code level. Enterprise Impact Assessment. Automatically analyze the impact, to every asset in the enterprise down to the code level. Automated IT Governance Software. Create rules and alerts based on code level insights, including security issues, to automate governance. Enterpr...
Cloud is the motor for innovation and digital transformation. CIOs will run 25% of total application workloads in the cloud by the end of 2018, based on recent Morgan Stanley report. Having the right enterprise cloud strategy in place, often in a multi cloud environment, also helps companies become a more intelligent business. Companies that master this path have something in common: they create a culture of continuous innovation.
Your job is mostly boring. Many of the IT operations tasks you perform on a day-to-day basis are repetitive and dull. Utilizing automation can improve your work life, automating away the drudgery and embracing the passion for technology that got you started in the first place. In this presentation, I'll talk about what automation is, and how to approach implementing it in the context of IT Operations. Ned will discuss keys to success in the long term and include practical real-world examples. Ge...
ClaySys Technologies is one of the leading application platform products in the ‘No-code' or ‘Metadata Driven' software business application development space. The company was founded to create a modern technology platform that addressed the core pain points related to the traditional software application development architecture. The founding team of ClaySys Technologies come from a legacy of creating and developing line of business software applications for large enterprise clients around the ...
CloudEXPO | DevOpsSUMMIT | DXWorldEXPO Silicon Valley 2019 will cover all of these tools, with the most comprehensive program and with 222 rockstar speakers throughout our industry presenting 22 Keynotes and General Sessions, 250 Breakout Sessions along 10 Tracks, as well as our signature Power Panels. Our Expo Floor will bring together the leading global 200 companies throughout the world of Cloud Computing, DevOps, IoT, Smart Cities, FinTech, Digital Transformation, and all they entail.
Eric Taylor, a former hacker, reveals what he's learned about cybersecurity. Taylor's life as a hacker began when he was just 12 years old and playing video games at home. Russian hackers are notorious for their hacking skills, but one American says he hacked a Russian cyber gang at just 15 years old. The government eventually caught up with Taylor and he pleaded guilty to posting the personal information on the internet, among other charges. Eric Taylor, who went by the nickname Cosmo...
Most modern computer languages embed a lot of metadata in their application. We show how this goldmine of data from a runtime environment like production or staging can be used to increase profits. Adi conceptualized the Crosscode platform after spending over 25 years working for large enterprise companies like HP, Cisco, IBM, UHG and personally experiencing the challenges that prevent companies from quickly making changes to their technology, due to the complexity of their enterprise. An accomp...
The benefits of automated cloud deployments for speed, reliability and security are undeniable. The cornerstone of this approach, immutable deployment, promotes the idea of continuously rolling safe, stable images instead of trying to keep up with managing a fixed pool of virtual or physical machines. In this talk, we'll explore the immutable infrastructure pattern and how to use continuous deployment and continuous integration (CI/CD) process to build and manage server images for any platfo...
DevOpsSUMMIT at CloudEXPO, to be held June 25-26, 2019 at the Santa Clara Convention Center in Santa Clara, CA – announces that its Call for Papers is open. Born out of proven success in agile development, cloud computing, and process automation, DevOps is a macro trend you cannot afford to miss. From showcase success stories from early adopters and web-scale businesses, DevOps is expanding to organizations of all sizes, including the world's largest enterprises – and delivering real results. Am...
Nicolas Fierro is CEO of MIMIR Blockchain Solutions. He is a programmer, technologist, and operations dev who has worked with Ethereum and blockchain since 2014. His knowledge in blockchain dates to when he performed dev ops services to the Ethereum Foundation as one the privileged few developers to work with the original core team in Switzerland.
It cannot be overseen or regulated by any one administrator, like a government or bank. Currently, there is no government regulation on them which also means there is no government safeguards over them. Although many are looking at Bitcoin to put money into, it would be wise to proceed with caution. Regular central banks are watching it and deciding whether or not to make them illegal (Criminalize them) and therefore make them worthless and eliminate them as competition. ICOs (Initial Coin Offer...
Andrew Keys is Co-Founder of ConsenSys Enterprise. He comes to ConsenSys Enterprise with capital markets, technology and entrepreneurial experience. Previously, he worked for UBS investment bank in equities analysis. Later, he was responsible for the creation and distribution of life settlement products to hedge funds and investment banks. After, he co-founded a revenue cycle management company where he learned about Bitcoin and eventually Ethereal. Andrew's role at ConsenSys Enterprise is a mul...
René Bostic is the Technical VP of the IBM Cloud Unit in North America. Enjoying her career with IBM during the modern millennial technological era, she is an expert in cloud computing, DevOps and emerging cloud technologies such as Blockchain. Her strengths and core competencies include a proven record of accomplishments in consensus building at all levels to assess, plan, and implement enterprise and cloud computing solutions. René is a member of the Society of Women Engineers (SWE) and a m...
Sanjeev Sharma Joins November 11-13, 2018 @DevOpsSummit at @CloudEXPO New York Faculty. Sanjeev Sharma is an internationally known DevOps and Cloud Transformation thought leader, technology executive, and author. Sanjeev's industry experience includes tenures as CTO, Technical Sales leader, and Cloud Architect leader. As an IBM Distinguished Engineer, Sanjeev is recognized at the highest levels of IBM's core of technical leaders.