Proxmox Hypervisor, vCPU, RAM... etc

[Stephen Partington]

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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>
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