QEMU and KVM

QEMU:

Its a virtul machine virtualization like

Like : VMware, VirtualBox


Its able to simulate/emulate new operating system in a operating system.

Good performance than virtualbox:

because it executes guest operating system code on the actual real cpu.



Comments

Post a Comment

Popular posts from this blog

Basics of networking : Model,Router,firewall,Switch, wireless access points

Image
Router: Layer 3 device of OSI model, deals with communication via IP address, Private Network, public network etc. routing protocols OSPF, etc are used, with concepts like routing tables. DNS: Domain Name server DHCP: Dynamic Host Configuration Protocol ======================================================================== NETWORKS , SUBNETWORKS and ROUTE                                   ROUTING TABLE  Destination     Gateway         Genmask         Flags Metric Ref    Use Iface default             gateway             0.0.0.0         UG    100    0        0 em2 15.15.0.0       10.10.4.99      255.255.255.0   U...
Read more

RAN | O-RAN | Open RAN | Open Radio Access Network | Layers |

Image
 RAN Elements  Antennas  convert electrical signals into radio waves. Radios  transform digital information into signals that can be sent wirelessly and ensure that transmissions are in the correct frequency bands with the right power levels. Baseband units ( BBUs )  provide a set of signal processing functions that make wireless communication possible. Traditional baseband uses custom electronics combined with multiple lines of code to enable wireless communication, typically using the licensed radio spectrum. BBU processing detects errors, secures the wireless signal and ensures that wireless resources are used effectively. RAN Radio Resources  Radio Resources Management Techniques  Power control, scheduling, cell search, cell reselection, handover, radio link or connection monitoring, and connection establishment and re-establishment. bearer selection (Master Cell Group (MCG),  bearer, Secondary Cell Group (SCG) bearer, Split bearer),   ...
Read more

devstack installation - Compute node

 0. sudo hostnamectl set-hostname compute-141 1. Remove any symlik of /etc/resolve.conf and add nameserver 8.8.8.8 nameserver 8.8.4.4 2. check df -h [ /, should have good space] 3. checl internet connectivity, ping www.google.com 4. if possible disable Ipv6, ip allocation #No mandatory /etc/netplan/50-cloud-init.yaml  5. And host name entry in /etc/host give root as default user and sudo priviledge sudo useradd -s /bin/bash -d /opt/stack -m stack echo "stack ALL=(ALL) NOPASSWD: ALL" | sudo tee /etc/sudoers.d/stack su - stack sudo apt install git -y git clone https://git.openstack.org/openstack-dev/devstack  # git clone https://opendev.org/openstack-dev/devstack -b stable/ussuri # All codes have been downloaded in /opt/stack/devstack directory cd devstack Edit local.conf and add your desired conf details run --> ./stack.sh --use-feature=2020-resolver Working compute node local.conf[change compute IP accordingly] **********************************************************...
Read more