Proxmox Hypervisor, vCPU, RAM... etc

Sun Oct 9 07:20:09 MST 2022

Nice!!  My head is on fire!!

I think one of you said you were running a Linux desktop VM.  Is it 
possible to configure one machine to do multiple private VMs for testing 
and development, a production website VM, and a Desktop VM.  Would I be 
able to attach the Desktop VM to two or more monitors?

On 2022-10-09 07:02, keith Miller wrote:
> if your gonna play with it, a server can be had DIRT cheap
> the R-610 I got on amazon for 150.00 32Gig of ram and 2 320Gig drive
> (Which I upgraded
> I have another server for more play bought it on craigslist from a guy
> for 70.00 HP DL360G7, it has 4 2tb drives and 32Gig ram
> 
> al this mounted in a half rack, along with a 24 ports (1gig) Netgear
> GS724TI bought at goodwill for $9.99
> 
> Keith
> 
> On Sun, Oct 9, 2022 at 6:48 AM Keith Smith via PLUG-discuss
> <plug-discuss at lists.phxlinux.org> 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
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> 
> --
> Keith D. Miller