Virtualization Blog

Discussions and observations on virtualization.

Better Together: PVS and XenServer!

XenServer adds new functionality to further simplify and enhance the secure and on-demand delivery of applications and desktops to enterprise environments.

If you haven't visited the Citrix blogs recently, we encourage you to visit https://www.citrix.com/blogs/2016/10/31/pvs-and-xenserver-better-together/ to read about the latest integration efforts between PVS and XS.

If you're a Citrix customer, this article is a must read!

Andy Melmed, Senior Solutions Architect, XenServer PM

 

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Making a difference to the next release

With the 1st alpha build of the new, upcoming XenServer release (codenamed " Ely") as announced by Andy Melmed's blog on the 11th October – I thought it'd be useful to provide a little retrospective on how you, the xenserver.org community, have helped getting it off to a great start by providing great feedback on previous alphas, betas and releases - and how this has been used to strengthen the codebase for Ely as a whole based on your experiences.
 
As I am sure you are well aware - community users of xenserver.org can make use of the incident tracking database at bugs.xenserver.org to raise issues on recent alphas, betas and XenServer releases to raise issues or problems they've found on their hardware or configuration.  These incidents are raised in the form of XSO tickets which can then be commented upon by other members of the community and folks who work on the product.  
 
We listened
Looking back on all of the XSO tickets raised on the latest 7.0 release - these total more than 200 individual incident reports.  I want to take the time to thank everyone who contributed to these, often detailed, specific, constructive reports, and for working iteratively to understand more of the underlying issues.  Some of these investigations are ongoing, and need further feedback, but many of them are sufficiently clear to move forward to the next step.  
 
We understood
The incident reports were triaged and, by working with the user community, more than 80% of them have been processed.  Frequently this involved questions and answers to get a better handle on what was the underlying problem.  Then trying a change to the configuration or even a private fix to see and confirm if it related to the problem or resolved it.  The enthusiasm and skill of the reporters has been amazing, and continually useful.  At this point - we've separated the incidents into those which can be fixed as bugs, and those which are requests for features.  The latter have been provided to Citrix product management for consideration.  
 
We did
Out of these which can be fixed as bugs,  we raised or updated 45 acknowledged defects in XenServer.  More than 70% of these are already fixed - with another 20% being actively worked on.  The small remainder are blocked for some reason and awaiting a change elsewhere in the product, upstream or in our ability to test.  The 70% of fixes have now successfully either become part of some of the hotfixes which have been released for 7.0, or are in the codebase already and are being progressively released as part of the Ely alpha programme for the community to try.  
 
So what's next?  With work continuing apace on Ely - we have now opened the "Ely alpha" as a affects-version in the incident database to raise issues with this latest build.  At the same time - in the spirit of continuing to progressively improve the actively developing codebase - we have removed the 6.5 SP1 affects-version – so folks can focus on the new release.
 
Finally - on behalf of all xenserver.org users - my personal thanks to everyone who has helped improve both Dundee and Ely - both by reporting incidents, triaging and fixing them and by continuing to give your feedback on the latest new version.  This really makes a difference to all members of the community.
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XenServer Ely Alpha 1 Available

Hear ye, hear ye… we are pleased to announce that an alpha release of XenServer Project Ely is now available for download! After Dundee (7.0), we've come a little closer to Cambridge (the birthplace of Xen) for our codename, as the city of Ely is just up the road.

 
Since releasing version 7.0 in May, the XenServer engineering team has been working fervently to prepare the platform with the latest innovations in server virtualization technology. As a precursor, a pre-release containing the prerequisites for enabling a number of powerful (and really cool!) new features has been made available for download from the pre-release page.
 

What's In it?

 

The following is a brief description of some of the feature-prerequisites included in this pre-release:

 

Xen 4.7:  This release of Xen adds support for "live-patching" of the Xen hypervisor, allowing issues to be patched without requiring a host reboot. In this alpha release there is no functionality for you to test in this area, but we thought it was worth telling you about none the less. Xen 4.7 also includes various performance improvements, and updates to the virtual machine introspection code (surfaced in XenServer as Direct Inspect).

 

Kernel 4.4: Updated kernel to support future feature considerations. All device drivers will be at the upstream versions; we'll be updating these with drops direct from the hardware vendors as we go through the development cycle.

 

VM import/export performance: a longstanding request from our user community, we've worked to improve the import/export speeds of VMs, and Ely alpha 1 now averages 2x faster than the previous version.

 

What We'd Like Help With

 

The purpose of this alpha release is really to make sure that a variety of hardware works with project Ely. Because we've updated core platform components (Xen and the Dom0 kernel), it's always important to check on hardware that we don’t have in our QA labs that all is well. Thus, the more people who can download this build, install, and run a couple of VMs to check all is well the better.

 

Additionally, we've been working with the community (over on XSO-445) on improving VM import/export performance: we'd like to see whether the improvements we've seen in our tests are what you see too. If they're not, we can figure out why and fix it :-).

 

Upgrading

 

This is pre-release software, not for production use. Upgrades from XenServer 7.0 should work fine, but it goes without saying that you should ensure you back up any critical data.

 

Reporting Bugs

 

We encourage visitors to download the pre-release and provide us with your feedback. If you do find a problem, please head over to the bug tracker and file a ticket. Please be sure to include a server status report!

 

Now that we've moved up to a new pre-release project, it's time to remove the XS 6.5 SP1 fix version from the bug tracker, in order that we keep it tidy. You'll see an "Ely alpha" affects version is now present instead.

 

What Next?

 

Stay tuned for another pre-release build in the near future: as you may have heard, we've been keeping busy!

 
As always, we look forward to working with the XenServer community to make the next major release of XenServer the best version ever!

 

Cheers!

 

Andy M.

Senior Solutions Architect - XenServer PM

 

Recent Comments
David Reade
The download link for the release notes does not work. For "info.citrite.net" I'm getting "server not found". Is this a link to an... Read More
Tuesday, 11 October 2016 15:56
Tobias Kreidl
Always nice to see XenServer improvements and added features. The new kernel and live patching are nice. The vm-export/import gain... Read More
Wednesday, 12 October 2016 06:41
Willem Boterenbrood
Tobias, In my XenServer 7.0 test environment I see a large improvement of VM export speed compared to my 6.5SP1 live environment.... Read More
Friday, 14 October 2016 07:13
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About XenServer

XenServer is the leading open source virtualization platform, powered by the Xen Project hypervisor and the XAPI toolstack. It is used in the world's largest clouds and enterprises.
 
Commercial support for XenServer is available from Citrix.