some more questions: private network, shared mem

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Cybodog

New Member
May 8, 2009
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I have two more questions and my testing machines are limited to test on at this point:

1. can you set up vms on separate private networks inside of proxmox, something like:


____vmbr0---IP192.168.1.0/24--KVMs/VPSs
eth0-|
------vmbr1-----IP192.169.100.0/24--KVMs/VPSs

with or with out external networking?

2. I was under the impression that proxmox used shared mem for KVMs but the other day, poking around (I don't remember what comand, via the qemu monitor on on the host) I found a command that said shared mem was not compiled into the kernel. Are we using the shared mem ability of KVM with proxmox? What about ballooning?
 
Cybodog said:
1. can you set up vms on separate private networks inside of proxmox, something like:
Click to expand...

Yes.

Cybodog said:
2. I was under the impression that proxmox used shared mem for KVMs but the other day, poking around (I don't remember what comand, via the qemu monitor on on the host) I found a command that said shared mem was not compiled into the kernel.
Click to expand...

What feature is not compiled in - exactly?

Cybodog said:
Are we using the shared mem ability of KVM with proxmox?
Click to expand...

Sorry, I am not aware of that feature - what exactly?

Cybodog said:
What about ballooning?
Click to expand...

ballooning needs guest support, so its quite useless - But AFAIK it works for linux guest, but i never tested it.
 
dietmar said:
ballooning needs guest support, so its quite useless - But AFAIK it works for linux guest, but i never tested it.
Click to expand...

It works, but current implementation only allows you to lower guest memory.

For example, if you started a guest with 1 GB RAM, you won't be able to balloon out this guest's memory to 2 GB.

You will be able to decrease guest's memory to i.e. 512 MB, then increase it to 1 GB etc. - but never more than what was initially allocated at guest's start.
 
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