Tag-Based Automation: Manage VM CPU Priority via assigned tag.
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@johnnezero It would be also interesting to take UMA/NUMA into account as VMs -- in particular, VMs with vGPUS -- can run much more efficiently if they do not cross memory bank boundaries that span more than one CPU instance. On some Linux systems -- not sure about the one hosting XCP-ng -- you can even disable NUMA. Just an additional thought here. I published a number of years ago a three-part series "A Tale of Two Servers" discussing a number of related optimizations but alas, the Citrix blogs were eliminated and I'm snot sure where copies of these articles exist anymore. But there are plenty of articles on this, in particular by Frank Denneman, and also ones like the following;
https://indico.cern.ch/event/304944/contributions/1672535/attachments/578723/796898/numa.pdf
https://docs.xenserver.com/en-us/xenserver/9/numa.htmlIf you remember the URL and date maybe try the wayback machine of Internet Archive. They’re known to archive sites and articles wherever they can, may hold a copy that’s accessible.
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@tjkreidl Wow that all sounds pretty intense - will keep it in mind. Thanks much!
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@john.c Not found with the Wayback Machine, alas. Still not finding it anywhere else, but will keep looking!
It's a crying shame Citrix didn't preserve the treasure trove of old community blogs. -
@john.c Not found with the Wayback Machine, alas. Still not finding it anywhere else, but will keep looking!
It's a crying shame Citrix didn't preserve the treasure trove of old community blogs.I did a bit of digging with the aid of AI and I’ve managed to uncover the original three blog posts of NUMA and references to UMA. If you do some more digging you may be able to uncover the rest, so it can be rewritten and/or updated, then be hosted somewhere that won’t go down so easily, or be lost as easily. If you do an update or write etc, may I suggest switching the images used to WebP or AVIF format, will seriously help file size while maintaining their quality (or even giving room for higher quality). Consider switching to SVG for diagrams rather than raster (or as the default). I’d suggest checking out to consider using Mermaid for diagrams (https://mermaid.ai/open-source/?utm_medium=hero&utm_campaign=variant_a&utm_source=mermaid_js). Maybe if you do a rewrite use markdown and something like Hugo, to generate it from the files to host on GitHub or some other pages providing repository (e.g. GitLab Pages or Codeberg Pages).
https://community.citrix.com/forums/topic/235895-xenserver-vm-citrix-worker-sizing-question/
https://xcp-ng.org/forum/topic/9359/cpu-provisioning
https://community.citrix.com/forums/topic/241553-bios-power-performance-settings/
https://community.citrix.com/forums/topic/243640-citrix-hypervisor-performance-tips/
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@john.c FYI: Bundling/done (Plugin/To come...)
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@john.c Wow, that was amazing -- not sure why my searches were unsuccessful, but many thanks! I think Github might be a good option for putting these on-line as a more reliable spot. And, yes, preserving images is always a challenge.
I do hope some of that information may be useful to you and thanks much again for all your efforts, John!P.S. Seems the easiest way to get the full content is to save the Web page as a PDF file, which I have since done. You can, of course, also download the whole package to an HTML folder but that output looks a bit messy, though it does split things out nicely. I'll consider one or the other or both for putting up somewhere, like on Github, but at least I have them now!
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@john.c Wow, that was amazing -- not sure why my searches were unsuccessful, but many thanks! I think Github might be a good option for putting these on-line as a more reliable spot. And, yes, preserving images is always a challenge.
I do hope some of that information may be useful to you and thanks much again for all your efforts, John!A bit of AI archeology combined with Internet Archive Wayback Machine helped. The AI helped to surface the exact URL of the blog posts and these were fed into Wayback Machine. Used the snapshot from 2022 anything newer and they weren’t there anymore. By the way it may be worth sending a donation Internet Archive’s way (if not done so already), as without this your blog posts would be truly gone for good!!
Oh forgot to add GitHub and GitLab follows digital wills, so you can pass this off to another in a will, or generally be made read only while being kept up, when the time comes. So this hard work will be preserved even in the face of the end.
Just please let me and the rest of us know where it’s at when done!
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@john.c @johnnezero Well, the Github reporsitory is in place already! Access it at:
https://github.com/tobiaskreidl/Citrix-Tobias-Kreidl-Collection
Feel free to find more material to add, as will I, and thank you kindly for the suggestions and support. -
@john.c @johnnezero Well, the Github reporsitory is in place already! Access it at:
https://github.com/tobiaskreidl/Citrix-Tobias-Kreidl-Collection
Feel free to find more material to add, as will I, and thank you kindly for the suggestions and support.Is the repository supposed to just have the readme, or are there supposed to be other files (e.g. MDs, pics or the PDFs? Or is it in the releases section - which is currently empty?
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@john.c They are under two branches ... do you not see them?
XenServer-Articles and XenServer-Forum-Threads -- they landed under the "Branches" section ...
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@tjkreidl FYI: I went ahead and deleted the hardware category post (to avoid confusion), that way it can be posted against your official github. All good...
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@johnnezero Cool -- you guys probably have a way better idea of a proper layout and organization of the materials. Thank you!
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