News

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  What is what: XCP-ng, XCP-ng Center, XenOrchestra, XOA, Vates
  • borzel  

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  News section: bring your news here!
  • olivierlambert  

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  Article from Switzerland (in german, wrong fact: format missmatch on upgrade from XS): https://www.weka.ch/themen/it-technik/it-systemmanagement/systemadministration/article/xcp-ng-frischer-wind-auf-dem-virtualisierungsmarkt/
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  XCP-ng 8.0.0 Beta now available!
  • stormi  

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  @Ultra2D said in XCP-ng 8.0.0 Beta now available!: @cg Sure, see man zfs : Unless necessary, deduplication should NOT be enabled on a system. See Deduplication I don't really see big arguments here. As I wrote: CONSIDER. I'm sure you know what that means. If I know I'm running a bunch of similar VMs, I'm pretty perfect by throwing a bit of RAM for multiplicating the effective space of my SSD array. It could diminish the need for an expensive vendor dedup-array. And continue from there. For instance: Deduplicating data is a very resource-intensive operation. It is generally recommended that you have at least 1.25 GiB of RAM per 1 TiB of storage when you enable deduplication. Calculating the exact requirement depends heavily on the type of data stored in the pool. So what's wrong with that? I said as rule of thumb I have 1 GB per TB in mind. A rule of thumb is not a law and roughly fits. Also: ZFS should always have some RAM for caching, so you need a bit anyways and RAM is pretty cheap these days. Though XCP-ng is a server OS: Don't forget to use ECC RAM on productive systems with important data. RAM corruption is can be pretty bad for ZFS.
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  Turnkey XOA deploy from xen-orchestra.com
  • olivierlambert  

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  XCP-ng Center 8.0.0 released
  • borzel  

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  @apayne as listed in the release notes, there is no help until someone cares about and does the work: https://github.com/xcp-ng/xenadmin/issues/20 borzel created this issue in xcp-ng/xenadmin open What about the help files (*.chm) #20
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  Citrix Hypervisor 8.0 landed
  • olivierlambert  

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  @stormi dd stands for disk dump and does exactly that: Copy a stream of data. Fio however can be configured for precise workloads and read/write mixes, parallel workloads etc. So the first thing will only give you streamline benchmarks, what almost nobody cares about. The second can simulate realworld (VM/database...) workloads, where (controller) Caches and non magnetic storage (Flash, Optane, MRAM...) makes the real difference. Also use big amount of data, since caches can impact small ones extremely. Don't get me wrong: We need them and they can make huge differences, but as long as your benchmarks fully fit into them, it gives your nonsense/fake results. Also (consumer) SSDs start throttling after some 10 to a very few 100 GB of data written. Their caches fill up and they 'overheat'. You can spend days on benchmarks and how to do what.
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  Spread the XCP-ng love and vote for Open Awards 2019!
  • Marc.pezin  

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  Good news, the vote are closed and the Public Center for Social Welfare's case study is first as we hoped! https://a.cstmapp.com/voteme/31130/633291567 Thank you everyone!
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  New XCP-ng "theme" in shell
  • olivierlambert  

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  Thanks for your input! I think it might be the one then Also, if there is a big problem with it, we can always update the package!
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  XCP-ng Security Bulletin: MDS hardware vulnerabilities in Intel CPUs
  • stormi  

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  No one raised their hands, and yet an update candidate for 7.5 is available with the fixes backported from 7.6. Install it with yum update --enablerepo='xcp-ng-updates_testing' microcode_ctl xen-dom0-libs xen-dom0-tools xen-hypervisor xen-libs xen-tools We've tested it locally, works fine for us.
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  This topic is deleted!
  • elias.medina  

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  Meet Vates during Vivatech 2019
  • Marc.pezin  

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  XCP-ng mirrors
  • olivierlambert  

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  Dev diaries #1: Analyzing storage perf (SMAPIv3)
  • ronan-a  

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  @Kalloritis I'm not sure about that. You see a stack of "unknown" functions because the tapdisk binary was not compiled with all debug symbols, contrary to qemu-dp. And I'm waiting for the next XenServer release before continuing this diary.
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  XCP-ng issue 1: closed!
  • olivierlambert  

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  Nicely done!
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  Xen 4.12 just landed
  • olivierlambert  

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  Terraform provider for Xen Orchestra
  • olivierlambert  

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  XO 5.33 is available
  • olivierlambert  

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  I don't know what's xo-updater, maybe an external script, but it's not the upstream one from XOA or XO project. And yes, there is some patches sometime (for xo-server, which is one package of Xen Orchestra). For example, xo-server in 5.38.0 never landed in XOA, because we did some QA before and found some issues. We patched it, and then we've done some QA again, and then we decided to release Xen Orchestra 5.33. That's why you can have sometimes some surprises from the sources, because it's not officially tested (unlike in XOA)
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  Netdata plugin for XCP-ng
  • olivierlambert  

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  XCP-ng team is growing
  • olivierlambert  

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  Welcome @BenjiReis !
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  New Xen XSA's
  • olivierlambert  

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  So: The updates have been made available by Citrix on last wednesday We've published update candidates for testers on thursday Updates for XCP-ng 7.6 have been made available to everyone yesterday Updates for XCP-ng 7.5 have been made available to everyone this morning Blog post published: https://xcp-ng.org/blog/2019/03/12/xcp-ng-security-bulletin-vulnerabilities-pv-guests/