Since we announced the “full” open-sourcing of XenServer back in 2013, there have been many questions and concerns about whether or not Citrix was committed to continuing its investments in Citrix XenServer.  Some have even implied that somehow Citrix had decided to discontinue XenServer as a commercially-supported product and technology.

Nothing could be further from the truth.

Citrix XenServer is alive and well!  It powers over 40% of Citrix XenDesktop deployments, and 60% of Citrix CloudPlatform-based production private and public IaaS cloud infrastructure environments.  It continues to power Enterprise data center modernization projects as the underlying server virtualization platform for some of the largest private and public institutions all over the world.

As I discussed at this year’s Citrix annual user conference, Synergy 2014, Citrix has, and will continue to, invest in the robust future roadmap of Citrix XenServer.

On July 8, 2014, we introduced to existing Citrix XenServer customers with active Subscription Advantage the latest Technology Preview of our next release of Citrix XenServer, codenamed Project Creedence.

Here’s a quick summary of the latest features included in the Citrix XenServer Tech Preview:


While previous releases focused on scale, this Tech Preview augments this by delivering significant performance improvements in the networking and storage space. This includes an in memory read-cache, support for Tapdisk3, Generic Receive Offload (GRO) and reintroduction of Workload Balancing (WLB).


The new 64-bit Linux Control Domain (dom0) removes a number of the bottlenecks which were present with the 32-bit Linux dom0 and gives us an opportunity to incorporate newer devices, with fewer kernel memory limitations on the number of devices in a system. One immediate benefit of a 64-bit dom0, is that we can use 64-bit compiler settings to take advantage of modern processor extensions, while a 64-bit dom0 removes previous constraints on vGPU scalability.


Significant number of newly supported guests and dramatically extended hardware compatibility.


Enhanced scalability of vGPU – still the world’s only true vGPU solution for graphically intensive workloads for virtualized environments, and optimized for XenDesktop. Now scales to 96 VMs compared to 64 VMs on Citrix XenServer 6.2.0 SP1.


Rescinding the prior deprecation notice, for the Distributed Virtual Switch Controller (DVSC).

TCO Reduction

Read-cache, TRIM and UNMAP support for VDI space reclamation.

For more details, please refer to the Citrix XenServer Tech Preview Release Notes.  And please stay tuned to my blogs on the future latest/greatest developments to Citrix XenServer.