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XenServer Dundee Beta.2 Available

With 2015 quickly coming to a close, and 2016 beckoning, it's time to deliver a holiday present to the XenServer community. Today, we've released beta 2 of project Dundee. While the lag between beta 1 in September and today has been a bit longer than many would've liked, part of that lag was due to the effort involved in resolving many of the issues reported. The team is confident you'll find both beta 2 and Steve Wilson's blog affirming Citrix's commitment to XenServer to be a nice gift. As part of that gift, we're planning to have a series of blogs covering a few of the major improvements in depth, but for those of you who like the highlights - let's jump right in!

CPU leveling

XenServer has supported for many years the ability to create resource pools with processors from different CPU generations, but a few years back a change was made with Intel CPUs which impacted our ability mix the newest CPUs with much older ones. The good news is that with Dundee beta.2, that situation should be fully resolved, and may indeed offer some performance improvements. Since this is an area where we really need to get things absolutely correct, we'd appreciate anyone running Dundee to try this out if you can and report back on successes and issues.

Increased scalability

Modern servers keep increasing their capacity, and not only do we need to keep pace, but we need to ensure users can create VMs which mirror the capacity of a physical machines. Dundee beta.2 now supports up to 512 physical cores (pCPUs), and can create guest VMs with up to 1.5 TB RAM. Some of you might ask about increasing vCPU limits, and we've bumped those up to 32 as well. We've also enabled Page Modification Logging (PML) in the Xen Project hypervisor as a default. The full design details for PML are posted in the Xen Project Archives for review if you'd like to get into the weeds of why this is valuable. Lastly we've bumped the kernel version to 3.10.93.

New SUSE templates

SUSE have released version 12 SP1 for both (SUSE Linux Enterprise Server) SLES and (SUSE Linux Enterprise Desktop) SLED, both of which are now supported templates in Dundee.

Security updates

Since Dundee beta.1 was made available in late September, a number of security hotfixes for XenServer 6.5 SP1 have been released. Where valid, those same security patches have been applied to Dundee and are included in beta.2.

Download Information

You can download Dundee beta.2 from the Preview Download page (http://xenserver.org/preview), and any issues found can be reported in our defect database (https://bugs.xenserver.org).     

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Comments 15

Tobias Kreidl on Tuesday, 22 December 2015 04:43

Great news, Tim! Is it correct the 32 VCPUs are now supported for both Linux and Windows guests (where of course supported by the native OS, naturally)? The number of VDIs per VM is at 254 now, is that correct?

0
Great news, Tim! Is it correct the 32 VCPUs are now supported for both Linux [u]and[/u] Windows guests (where of course supported by the native OS, naturally)? The number of VDIs per VM is at 254 now, is that correct?
Tim Mackey on Thursday, 24 December 2015 01:59

Thanks, Tobias. This would be 32 vCPUS for both PV and HVM. I *think* we're at 254 VDIs in Dundee, but with the caveat things might change prior to launch.

0
Thanks, Tobias. This would be 32 vCPUS for both PV and HVM. I *think* we're at 254 VDIs in Dundee, but with the caveat things might change prior to launch.
Guest - Vincent on Tuesday, 22 December 2015 14:12

It is possible to upgrade from a beta to a stable version?

Is the new xenserver use ext4, as Hypervisor are using SSD, and only ext4 support TRIM.

Thank you in advance,

Best regards,

N3ST

1
It is possible to upgrade from a beta to a stable version? Is the new xenserver use ext4, as Hypervisor are using SSD, and only ext4 support TRIM. Thank you in advance, Best regards, N3ST
Tim Mackey on Thursday, 24 December 2015 02:02

N3ST,

We never commit to a stable upgrade path from any preview version to a final release. It's been known to work in previous versions, but not something we explicitly test for. If you are running a preview in a quasi-production environment, the simplest way to ensure your VMs can be "upgraded" is to migrate them off the quasi-production servers when we release.

In terms of SSD, we don't really need to have explicit TRIM support since an SSD has a controller to deal with wear leveling. We could do a bit better with ext4, but to date I've not seen anything to say we're moving local storage to ext4.

-tim

0
N3ST, We never commit to a stable upgrade path from any preview version to a final release. It's been known to work in previous versions, but not something we explicitly test for. If you are running a preview in a quasi-production environment, the simplest way to ensure your VMs can be "upgraded" is to migrate them off the quasi-production servers when we release. In terms of SSD, we don't really need to have explicit TRIM support since an SSD has a controller to deal with wear leveling. We could do a bit better with ext4, but to date I've not seen anything to say we're moving local storage to ext4. -tim
Tobias Kreidl on Thursday, 24 December 2015 02:31

It's actually pretty trivial to update an ext3 volume to ext4 in place, so with the caveat that this is of course not an officially supported Citrix procedure, I have tested it and it works just fine. It has not caused any evidence of incompatibility issues, either, at least not that I have encountered.

0
It's actually pretty trivial to update an ext3 volume to ext4 in place, so with the caveat that this is of course [i]not[/i] an officially supported Citrix procedure, I have tested it and it works just fine. It has not caused any evidence of incompatibility issues, either, at least not that I have encountered.
Guest - fbifido on Thursday, 24 December 2015 01:51

Hi,
Will we be able to upgrade from 5.5/5.6 to Dundee ?
Is there an easy way to migrate from vSphere 5.5/6 to Dundee ?
Is there an easy way to migrate from Hyper-V 2012-R2 to Dundee ?

Thanks

0
Hi, Will we be able to upgrade from 5.5/5.6 to Dundee ? Is there an easy way to migrate from vSphere 5.5/6 to Dundee ? Is there an easy way to migrate from Hyper-V 2012-R2 to Dundee ? Thanks
Tim Mackey on Thursday, 24 December 2015 02:09

fbifido,

If you have servers in the 5.5/5.6 range, I would first upgrade to 6.0 and from there its a smooth upgrade to 6.5. I see nothing to say that it also wouldn't be a smooth upgrade to Dundee when we release. One thing to note is that most hardware certified for 5.5/5.6 is unlikely to be on the official HCL for Dundee. This has everything to do with what a given hardware vendor wishes to support.

For the vSphere migration, Citrix has a tool named "conversion manager". It is able to take vmdks associated with stopped VMs and convert them to XenServer vhds. I *believe* it works with 5.5, and suspect it is being modified for vSphere 6. Since it's a commercial feature, you'd need to have an existing commercial relationship with Citrix to confirm if the Dundee Tech Preview (equivalent of the beta with commercial bits added) contains this functionality.

Migration from Hyper-V isn't something we see very often. Prior to 2012, it was almost as simple as removing the Hyper-V integration tools importing the VHD into XenServer. Since 2012 went to VHDX, I'm not certain tooling has been created.

-tim

0
fbifido, If you have servers in the 5.5/5.6 range, I would first upgrade to 6.0 and from there its a smooth upgrade to 6.5. I see nothing to say that it also wouldn't be a smooth upgrade to Dundee when we release. One thing to note is that most hardware certified for 5.5/5.6 is unlikely to be on the official HCL for Dundee. This has everything to do with what a given hardware vendor wishes to support. For the vSphere migration, Citrix has a tool named "conversion manager". It is able to take vmdks associated with stopped VMs and convert them to XenServer vhds. I *believe* it works with 5.5, and suspect it is being modified for vSphere 6. Since it's a commercial feature, you'd need to have an existing commercial relationship with Citrix to confirm if the Dundee Tech Preview (equivalent of the beta with commercial bits added) contains this functionality. Migration from Hyper-V isn't something we see very often. Prior to 2012, it was almost as simple as removing the Hyper-V integration tools importing the VHD into XenServer. Since 2012 went to VHDX, I'm not certain tooling has been created. -tim
Tobias Kreidl on Thursday, 24 December 2015 18:36

Say, are there any plans on the roadmap to support 4k block storage devices?

0
Say, are there any plans on the roadmap to support 4k block storage devices?
Willem Boterenbrood on Friday, 25 December 2015 01:25

Congrats on the new release. I am extremely happy about the new CPU leveling in this release, this is a very important milestone towards the final version!

0
Congrats on the new release. I am extremely happy about the new CPU leveling in this release, this is a very important milestone towards the final version!
Guest - averell on Monday, 28 December 2015 12:40

In my 6.5 installation, I use the well known "trick" to forward drives to my VMs via modifying udev rules. in Dundee, the 50-udev.rules file is gone. Any other way to forward drives?

0
In my 6.5 installation, I use the well known "trick" to forward drives to my VMs via modifying udev rules. in Dundee, the 50-udev.rules file is gone. Any other way to forward drives?
Guest - Van Rue on Tuesday, 12 January 2016 19:42

Will OpenSuse LEAP 42.1 be supported next in the RC?

0
Will OpenSuse LEAP 42.1 be supported next in the RC?
Guest - Shafeek on Monday, 08 February 2016 08:58

what is the expected release date of new xenserver, I am desperate to upgrade my version to new release due to CPU levelling issue with 6.5.

0
what is the expected release date of new xenserver, I am desperate to upgrade my version to new release due to CPU levelling issue with 6.5.
Tobias Kreidl on Monday, 08 February 2016 18:43

@Shafeek: Citrix never comments on official release dates due to legal restrictions. If I were to guess, I'd say probably in Q2, possibly in conjunction with the Citrix Synergy conference in May. It's currently in the Technical Preview 2 release. Have you experimented with this most recent Dundee release?

0
@Shafeek: Citrix never comments on official release dates due to legal restrictions. If I were to guess, I'd say probably in Q2, possibly in conjunction with the Citrix Synergy conference in May. It's currently in the Technical Preview 2 release. Have you experimented with this most recent Dundee release?
Guest - Torben on Wednesday, 09 March 2016 12:19

Will there be a new public beta to match Tech Preview 3 ?

0
Will there be a new public beta to match Tech Preview 3 ?
Tim Mackey on Wednesday, 09 March 2016 14:43

@Torben,

Yes there will be. We're missing one ISO, and once that's sorted it'll be up. Goal is later today.

-tim

0
@Torben, Yes there will be. We're missing one ISO, and once that's sorted it'll be up. Goal is later today. -tim

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.
 
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