Proxmox Hypervisor, vCPU, RAM... etc

[techlists at phpcoderusa.com]

Think about the contrast.  In 1986 I bought my first computer which was 
a Commodore 64.  That was an exciting time in it's own right.  Consumer 
grade computers and there was that business I went into that was using a 
Commodore 64 to run their business.


On 2022-10-09 03:44, Stephen Partington wrote:
> That mini had only one nic. And I ran about 4 containers and 2 vms
> just fine.
> 
> On Sun, Oct 9, 2022, 6:43 AM Stephen Partington <cryptworks at gmail.com>
> 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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