SYS-CON MEDIA Authors: Yeshim Deniz, Elizabeth White, Pat Romanski, Carmen Gonzalez, Zakia Bouachraoui

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
The Blockchain Benchmark asks and answers the questions many people want to know about the state of Blockchain: What are the biggest barriers? What was your motivation to get involved? When will it mainstream? Who are the true influencers? What are its top use cases? Who will win over the next 5 years? How will the future unfold? And 20+ other valuable questions.
In addition to 22 Keynotes and General Sessions, attend all FinTechEXPO Blockchain "education sessions" plus 40 in two tracks: (1) Enterprise Cloud (2) Digital Transformation. PRICE EXPIRES AUGUST 31, 2018. Ticket prices: ($295-Aug 31) ($395-Oct 31) ($495-Nov 12) ($995-Walk-in) Does NOT include lunch.
SAP is the world leader in enterprise applications in terms of software and software-related service revenue. Based on market capitalization, we are the world's third largest independent software manufacturer. Harness the power of your data and accelerate trusted outcome-driven innovation by developing intelligent and live solutions for real-time decisions and actions on a single data copy. Support next-generation transactional and analytical processing with a broad set of advanced analytics - r...
DXWorldEXPO LLC announced today that Kevin Jackson joined the faculty of CloudEXPO's "10-Year Anniversary Event" which will take place on November 11-13, 2018 in New York City. Kevin L. Jackson is a globally recognized cloud computing expert and Founder/Author of the award winning "Cloud Musings" blog. Mr. Jackson has also been recognized as a "Top 100 Cybersecurity Influencer and Brand" by Onalytica (2015), a Huffington Post "Top 100 Cloud Computing Experts on Twitter" (2013) and a "Top 50 C...
Provide an overview of the capabilities of Azure Stack allowing you or your customers to adopt truly consistent Hybrid Cloud capabilities to deliver greater productivity in your cloud world. Ultan Kinahan is on a member of the Global Black Belt team at Microsoft with a focus on Azure Stack Hybrid Cloud. Ultan has been in the Azure team since the beginning, Has held roles in Engineering, Sales and now consults with both small to medium size business and the worlds largest organizations on how to ...
As the fourth industrial revolution continues to march forward, key questions remain related to the protection of software, cloud, AI, and automation intellectual property. Recent developments in Supreme Court and lower court case law will be reviewed to explain the intricacies of what inventions are eligible for patent protection, how copyright law may be used to protect application programming interfaces (APIs), and the extent to which trademark and trade secret law may have expanded relev...
Early Bird Registration Discount Expires on August 31, 2018 Conference Registration Link ▸ HERE. Pick from all 200 sessions in all 10 tracks, plus 22 Keynotes & General Sessions! Lunch is served two days. EXPIRES AUGUST 31, 2018. Ticket prices: ($1,295-Aug 31) ($1,495-Oct 31) ($1,995-Nov 12) ($2,500-Walk-in)
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...
Contino is a global technical consultancy that helps highly-regulated enterprises transform faster, modernizing their way of working through DevOps and cloud computing. They focus on building capability and assisting our clients to in-source strategic technology capability so they get to market quickly and build their own innovation engine.
Blockchain is a new buzzword that promises to revolutionize the way we manage data. If the data is stored in a blockchain there is no need for a middleman - the distributed database is stored on multiple and there is no need to have a centralized server that will ensure that the transactions can be trusted. The best way to understand how a blockchain works is to build one. During this presentation, we'll start with covering the basics (hash, nounce, block, smart contracts) and then we'll create ...
DevOpsSUMMIT at CloudEXPO will expand the DevOps community, enable a wide sharing of knowledge, and educate delegates and technology providers alike. Recent research has shown that DevOps dramatically reduces development time, the amount of enterprise IT professionals put out fires, and support time generally. Time spent on infrastructure development is significantly increased, and DevOps practitioners report more software releases and higher quality. Sponsors of DevOpsSUMMIT at CloudEXPO will b...
FinTech Is Now Part of the CloudEXPO New York Program. Financial enterprises in New York City, London, Singapore, and other world financial capitals are embracing a new generation of smart, automated FinTech that eliminates many cumbersome, slow, and expensive intermediate processes from their businesses. Accordingly, attendees at the upcoming 22nd CloudEXPO | DXWorldEXPO November 12-13, 2018 in New York City will find fresh new content in two new tracks called: FinTechEXPO New York Blockchain E...
In addition to 22 Keynotes and General Sessions, pick from 40 technical sessions in two tracks: (1) DevOpsSUMMIT (2) Cloud-Native & Serverless. EXPIRES AUGUST 31, 2018. Ticket prices: ($295-Aug 31) ($395-Oct 31) ($495-Nov 12) ($595-Walk-in) Does NOT include lunch. DevOps Institue Certification DevOps Institute Two-Day DevOps Certification Program EXPIRES AUGUST 31, 2018. Ticket prices: ($995-Aug 31) ($1,095-Oct 31) ($1,195-Nov 12) ($1,395-Walk-in)
Cloud adoption is a core component of digital transformation. Scaling the IT environment, making it resilient, and reducing costs are what organizations want. Hear from the author of the best selling Packtbook "Architecting Cloud Computing Solutions" as he presents and explains critical Cloud solution design considerations and technology decisions required to choose and deploy the right Cloud service and deployment models, that are aligned to your business and technology service requirements. T...
Wasabi is the hot cloud storage company delivering low-cost, fast, and reliable cloud storage. Wasabi is 80% cheaper and 6x faster than Amazon S3, with 100% data immutability protection and no data egress fees. Created by Carbonite co-founders and cloud storage pioneers David Friend and Jeff Flowers, Wasabi is on a mission to commoditize the storage industry. Wasabi is a privately held company based in Boston, MA. Follow and connect with Wasabi on Twitter, Facebook, Instagram and the Wasabi blog...