Proxmox Hypervisor, vCPU, RAM... etc

[Stephen Partington]

Indeed!

Proxmox has been on of my all time favorite VM solutions.

If you dig down into the docs I think you will see why. But there is a ton
of digging you can do.

On Sun, Oct 9, 2022, 9:48 AM <techlists at phpcoderusa.com> wrote:

> Very exciting what we are to do with modern hardware.
>
>
> On 2022-10-09 03:43, Stephen Partington wrote:
> > I have run proxmox on Mac minis 4 cores/8 threads and originally 8gm
> > ram. I upgraded ram heavily and stuffed in an ssd to run as a lvm
> > cache to the 5400 1t drive and it performed well as a home lab server
> > for years.
> >
> > All the rest is use case recommended for a server. Possibly in
> > production.
> >
> > On Sat, Oct 8, 2022, 9:08 PM <techlists at phpcoderusa.com> wrote:
> >
> >> That sounds scary.
> >>
> >> Ok, so I am coming away with a vCPU is = to a thread.  RAM  is
> >> fixed.  I
> >> read Proxmox requires 2GB of RAM and I was unable to determine the
> >> number of cores for Proxmox.
> >>
> >> Proxmox says you will need Intel EMT64 or AMD64 with Intel VT/AMD-V
> >> CPU
> >> flag.
> >>
> >> They suggest SSD disks, and redundant Gbit NICs.  I assume along
> >> these
> >> lines you would want redundant power supplies.
> >>
> >> Another Question :
> >>
> >> I have a Cox business connection that allows me to run servers and
> >> to be
> >> allocated more than 1 static IP.
> >>
> >> I can see me configuring at least 4 virtual machines for LAMP - PHP
> >> testing and development, and a VM for a real website.  Not all of
> >> these
> >> VMs would be active at once.
> >>
> >> Since I would be running this out of my home office, to be safe, I
> >> would
> >> need enough RAM to allocate 4GB of RAM of reach _active_ VM and 2
> >> vCPUs,
> >> and to be safe maybe 4GB of ram and 2 cores for Proxmox.
> >>
> >> For 4 simultaneously active VMs I would need 8vCPUs (8 threads) and
> >> 4GB
> >> of RAM each or 16GB of RAM.  Add to that 2 Cores/4 threads and 4GB
> >> of
> >> RAM for Proxmox and I would need 12 threads or 6 cores and 20GB of
> >> RAM.
> >>
> >> I'm thinking a 500GB SSD would be enough and if I like I could add a
> >>
> >> redundant NIC and a redundant power supply.
> >>
> >> Pretty much a consumer grade box?
> >>
> >> Your thoughts?
> >>
> >> On 2022-10-07 18:23, Stephen Partington via PLUG-discuss wrote:
> >>> Hit reply too soon. You can share or overprovision ram but you
> >> have to
> >>> enable some features and load a couple of os level drivers to make
> >> it
> >>> work.
> >>>
> >>> On Fri, Oct 7, 2022, 9:22 PM Stephen Partington
> >> <cryptworks at gmail.com>
> >>> wrote:
> >>>
> >>>> And you can share ram across containers not vms.
> >>>>
> >>>> On Fri, Oct 7, 2022, 9:21 PM Stephen Partington
> >>>> <cryptworks at gmail.com> wrote:
> >>>>
> >>>> i love proxmox.have used it fir years
> >>>>
> >>>> The vcou is socket x cores x2 if you have hyperv/smt
> >>>>
> >>>> So a 4 core ht cpu would be 8vcpu.
> >>>>
> >>>> On Fri, Oct 7, 2022, 7:35 PM Keith Smith via PLUG-discuss
> >>>> <plug-discuss at lists.phxlinux.org> wrote:
> >>>>
> >>>> Hi,
> >>>>
> >>>> I just watched a video that covered the Proxmox Hypervisor.
> >> Seems
> >>>> simple enough.  I've used Oracle's VirtualBox for years.
> >>>>
> >>>> So I did some research on what a vCPU is.  I was suppressed.  The
> >>>> math
> >>>> given was (Threads x Cores) x Physical CPU = Number vCPU.
> >>>>
> >>>> I have an old laptop that has 1 socket, 2 cores, four threads,
> >> and
> >>>> 4GB
> >>>> of RAM.
> >>>>
> >>>> Given the math (4 x 2) x 1 = 8 vCPUS.  Is this correct?
> >>>>
> >>>> From my reading it appears that RAM is not shared, so my
> >> bottleneck
> >>>> is
> >>>> RAM not cores or threads.
> >>>>
> >>>> I am a PHP developer and a local vps would need 2GB of RAM at a
> >>>> minimum.
> >>>> I have found a LAMP VPS will crash if allocated less than 2GB of
> >>>> RAM,
> >>>> and will run will on 1 vCPU.
> >>>>
> >>>> The good news is I really only need one VPS to be active at any
> >>>> given
> >>>> time.
> >>>>
> >>>> If I wanted to build a box that could run more than one VPS at a
> >>>> time,
> >>>> lets say 4, and I wanted to allocate 2 vCPUs and 4GB of RAM I
> >> would
> >>>> need
> >>>> 4 threads x 2 cores to run the 4 VPS configured with 2 vCPUs
> >> each.
> >>>>
> >>>> What about RAM.  Looks like I would need a minimum of 16GB of
> >> ram.
> >>>>
> >>>> How much resources does the Hypervisor need, in this case
> >> Proxmox?
> >>>>
> >>>> Thanks!!
> >>>> Keith
> >>>> ---------------------------------------------------
> >>>> PLUG-discuss mailing list: PLUG-discuss at lists.phxlinux.org
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