Tech

A 16G memory VM

by Phyllis · February 1, 2010

Eventually , I have installed a guest VM with 16Memory through KVM under CentOS 5.4 with NAT network . It looks like KVM is the one of the very few free vm manager that is capable of creating a guest with more than 6G of memory.

I didn’t install KVM during OS installation , I follow steps mentioned in KVM – CentOS Wiki to install it :

1. After confirming that the processor is compatitble (CPU with vmx flags ), install all required kvm required packages :

# yum install kvm kmod-kvm
# yum install qemu
# modprobe kvm-intel
# /sbin/lsmod | grep kvm
kvm_intel 86248 0
kvm 223520 1 kvm_intel
# chown root:kvm /dev/kvm
# chmod 0660 /dev/kvm
# ls -alt /dev/kvm
crw-rw—- 1 root kvm 10, 232 Jan 21 16:02 /dev/kvm

2. Create a 30G virtual machine disk in /data1 :

# mkdir /data1
# cd /data1
# qemu-img create -f qcow2 disk.img 30G

3. Install OS to the VM :
For Character mode
Start up 16G Memory virtual machine and start installation of RedHat Linux 5 Ent x64 . The “-boot d ” parameter means it should boot from CDROM drive