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Virtualization

Virtualization and various virtualization related technologies has been explained including hardware virtualization, Software virtualization.

Why JVM is Called Virtual Machine?

The virtual machine part inside the phrase "Java Virtual Machine" often confuses many peoples with full virtualization. A Java Virtual Machine is an example of application virtualization. The Java Virtual Machine converts the compiled Java code into machine language to run it on the host computer. At that time, there was a concept named WORA (Write Once Run Anywhere). Today, we still have the idea … [Read more...]

What is Virtual Tape Library?

Tape drive is the only storage media of choice for an economically-valid archive strategy. In order to understand what is virtual tape library, we need to understand the original physical tape drives and tape libraries. Tape Library is a storage device containing one or more tape drives, slots to hold tape cartridges, and barcode reader to identify the tape cartridges. Tape drive is a data storage … [Read more...]

What is Hyper-converged Infrastructure (HCI)?

It is common to find what is Hyper-converged Infrastructure (HCI) in plain English. Hyper-converged Infrastructure is software-centric architecture which is based on the processors, memory, network virtualization and other closely interrelated technologies. Standard hardware with commercial off-the-shelf (COTS) components can be used as hardware. Often, such hyperconvergent systems are offered and … [Read more...]

Difference Between KVM and QEMU

In previously publications, we have discussed KVM virtualization, QEMU, Virtualization Capable Processors as separate articles. What is the Difference Between KVM and QEMU? KVM gives a window to access to the CPU and memory whereas QEMU emulates the hardware resources. That is in short and the fact.   What is the Difference Between KVM and QEMU?   QEMU is a software to emulate … [Read more...]

Install OpenVZ On CentOS To Create Virtual Servers

Previously we talked about OpenVZ and compared with Xen, KVM virtualization. OpenVZ is Free Software intended for production usage. CentOS or Red Hat Enterprise Linux are practical GNU/Linux distro for certain works. Furthermore, CentOS has lot of users who are using OpenVZ. We can use OpenVZ on dedicated server to create multiple virtual servers. Here is how to install OpenVZ on CentOS to create … [Read more...]

Mainframe Server Virtualization : Basics

Mainframe, UNIX and real physical terminal mean real powerful computing. Mainframe server virtualization avoids maintaining many racks of servers with cables adds scalability, savings in long term in green way. The reason mainstream server businesses can not run mainframe as servers is partially initial higher cost of purchase and partially due to lack of knowledge. 5-6 years ago from today we … [Read more...]

OpenVZ Versus Docker And More On Linux System Container Platforms

Docker becoming a common word to be seen in various places - from writings by web hosts to various websites. It is possibly obvious to think towards OpenVZ Versus Docker. Additionally here is more on linux system container platforms like LXC, LXD. No, LXC, Docker, and LXD, are not quite the same. Indeed, KVM, Xen can not be put under one bracket so easily. We think the reader is already aware of … [Read more...]

Container Virtualization Growing With Challenges

In older articles we talked about container virtualization and quite related application - OpenVZ virtualization. In general, when we talk about container, we mean Docker. We can actually run Docker on OpenVZ which is called nested virtualization. The containers seem to guarantee improvements in the application development. Distribution of applications faster reduces the deployment effort. More … [Read more...]

sysctl.conf Tweaking In OpenVZ Virtual Server Instance

Many of the OpenVZ users try to tweak sysctl.conf and are returned with error. OpenVZ kernel offers a conservative and stable kernel. Here is some information on sysctl.conf tweaking in OpenVZ virtual server instance. Our all tweaks related to system is on dedicated servers, if we tweak any cloud server, we mention the name of the vendor along with the tweak. Applying tweaks for other system on … [Read more...]

Unreal 4 Engine For Virtual World Clinical Consultation Room

As we want to SSH and run apt install or yum install commands, we need a difference between virtual reality and augmented reality with Free Software at Half Life or Unreal Tournament quality. I noticed that one useful guide that used Minecraft and one currently not available Software.  What about using Unreal 4 Engine for setup of virtual world clinical consultation room on colocation server … [Read more...]

Virtualization Softwares For Dedicated Server Consolidation

One can divide dedicated server in to virtual machines for consolidation, energy efficiency, testing and isolation of environment. This way of deployment is for powerful dedicated servers, not entry grade dedicated servers. Instead of using 3 dedicated servers for web server, database server, load balancer; we can use single bigger dedicated server and divide it or use many dedicated servers and … [Read more...]