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What is Virtualization? What are the Types?

Hello, in this article, I will talk about the benefits and opportunities that you will add to your company with virtualization technology. So what is this technology they call virtualization.

    Virtualization is the logical use of your physical servers’ ram, cpu, network and disks, that is, hardware called hardware. This structure not only reduces the loss of workforce and costs of medium and large enterprises, but also provides high efficiency and flexibility.

    If we give an example to be understood better, 1 cpu 4 core 8 gb. You have a physical server with ram. You are using an application running on the operating system you host. This application server uses 3 gb ram 1 cpu 2core and a certain disk space at maximum usage. Giving too many ram and cpu to a server does not mean that high performance will be obtained from the application hosted on that server. For this reason, the remaining 5 gb. Since ram and 1 cpu do not use all 4core, we cannot get efficiency over this hardware. The technology is deep, let me talk a little bit more. Let’s think of a cabinet full of servers, we have 2 or 20 servers and there is a separate application on each server. Would you look at this crowd of servers. For these servers, the server room, its design, network confusion, cooling system, There are many costs that we can count such as electricity consumption cost, licensing cost, installation of applications due to insufficient number of servers, service conflicts and maintenance cost failure problems of each server. If we will continue with our example, we have 20 physical servers and 20 operating systems running on it.   

    What about the backup (backup) first of all you bought a central backup program. What about agents? 20 agents are required and when we look at the total, a serious cost awaits you in this sense. Let’s assume that you take these costs into account and maintain your structure. In the event, you tried to go back from the backup due to a malfunction in the operating system or the application you are using. Here, depending on the size of your data, your return will take longer. But what if there is a problem with the operating system? re-installation of the server, If there is almost no problem to make the desired fine configuration to be configured and to return through the backup again, 2 hours (backup may be extended according to your size) and if there is a critical application on your server? Also, what if the fault is in the hardware of the physical server? Your company may lose customers and income depending on the work you do during this period. It will not be pleasant to reflect on you during this process. What will you do? Will you run all your servers in clusters? 20 new servers with the same features and the cost x 2 that came with these new servers, I guess, was not enough for this thought. Whether we do disaster, offf 40 one location 40 other location 80 physical server thinking cost. It’s time to switch to virtualization technology.

    Virtualization software, which is commonly used in today’s technology, can be considered as microsoft Hyper V, vmware ESXI and Citrix. Of course, Vmware ESXI (V SPHERE) technology is by far the leading in the sector. Before the transition to industrial technology, you need to determine what type of virtualization technology you need.

    Let’s determine together, virtualization technologies that are primarily used today. Server Virtualization is Application Virtualization and Desktop Virtualization. Since I do not have enough pages, I cannot go to the Storage Virtualization topic. So what should you use all of me? Of course, no, you can go step by step or just stand on one. I will focus heavily on the server virtualization side.

Server virtualization;It is the process of logically partitioning ram, CPU, disk and network resources, which are physical hardware parts on your server with the hypervisor software installed on your physical server.

    Let’s assume that you have 20 servers, your server resources that you used physically before virtualization are calculated and sent to you in a report. You can obtain this software from the vendor company belonging to the technology (Hyper V, ESXI) you use, or you can do this with different programs. As an example, you have decided to do virtualization by vmware. The consultant firm that will carry out the relevant transaction installs the capacity planner software on a server within your organization, and this software retrieves the information of the physical servers you are using over the network and reports them. The important thing in this report is the disk, ram and cpu information of 20 servers. You can run 20 servers on 1 strong physical server in line with the resources of the physical host to be extended. And you can get rid of 19 physical servers and the aforementioned costs. Now you have virtualized your 1 physical server, we can call this host a node. You have one physical node and 20 virtual servers are running in it. It is now much easier to take your backups in the virtualization sector, with veeam at the beginning of the backup software, symantec acronis ca arcservevb. You can take your backups on the basis of fileister image or item by showing your easily virtualized physical server with software. And it can get feedbacks very quickly and even test your backups for functionality. Let’s continue without getting lost from our subject. So now you have a virtual host (node) backups are being taken regularly. 20 virtual servers (virtual machine / vm) are running on the physical host you virtualize. But what if your virtualized host has a hardware failure? In our series of articles above, we were talking about clusters and disasters, but I can hear you say what to do now. We do not need to buy 20 servers for 20 servers. In our structure, we had 1 virtual node and 20 vm running in it. Now we get another server in the properties of this physical host and apply the same process, namely virtualize it. We have 2 esxi hosts in our environment, so how do we do the cluster. Looking at the structure in general, each server that becomes virtual works like a file on a disk. Therefore, this disk is located on the local disks of our physical server. 2. It must be able to access these disks on the host we virtualized. How will it be? Here, storage products come to our aid. And consider a structure like this, we have 2 esxi servers and 1 stock. Now, while we are going to do, transfer the data on the local disks to the disks on the storage. If it were physical, you would not even want to think about the cost of doing this on your old system. But since everything is virtual, it is very easy to perform these operations, close your virtual machines and move them to your disks on the storage with the move operation. Your data will be more secure in the storage system. After these operations, we had 2 esxi hosts in the environment, now these hosts will only serve our virtual machines for ram cpu and network use on their own, and all information about our virtual servers is on our database. Thus, if an event occurs as we mentioned above, that is, if our server running a virtual machine on it fails. Thanks to the cluster technology, without any loss of work automatically, the whole structure will continue on our virtual server. And in fact, this system will pay off its own cost during the year. Consider the cost encountered in physical use and now it will be enough to consider only the electricity consumption cost of only 2 servers and 1 storage that you use virtual. What if there is a disaster situation? In this regard, it is now in your hands to determine the cost, if you want the same structure, 2 servers and 1 storage product to be located in a disaster location, if you want a single powerful server and a single storage or only for certain operating systems, it will be sufficient to provide sufficient resources on a single server.

Application virtualization; We can explain the applications to be used within your company as a technology that allows the use of the applications on the server where the application virtualization process is performed without any installation on the computers of the end user. Let’s log in with a few vendors for this technology used in the industry, application virtualization serves as the app V vmware on the Microsoft side, and the Xen app on the citrix side.

    Apart from being able to centrally manage your applications, it also benefits you in updating and removing the applications you use. Also, since the applications you virtualize will not run on your client computers, you will prevent the end user from accidentally damaging these applications. It will be sufficient to update the programs you virtualize with application virtualization on the relevant server. When we thought otherwise, we had to do these operations on hundreds of computers. It is possible to distribute multiple applications as packages to end user computers. Thanks to this technology, you will be ahead of the configurations with many prerequisites for your application by end user computers.

Desktop virtualization;Problems with the operating system on a physical desktop computer become quite easy with this technology. If you wish, you can create an operating system for a user within minutes, install your related programs, turn off all machines with a single touch, and most importantly, you can back up all your users’ computers and all of these operations are done on a single console. The leading companies related to this technology can be listed as Citrix, Vmware and Microsoft.

    In summary, we can evaluate the benefits of virtualization to your company as follows. dynamically using hardware resources via hypervisor, enabling our virtual servers to work like real hardware servers. You can quickly create new servers through virtual templates. You can manage and report all servers through a single console. You can reduce licensing costs to a minimum, reduce hardware and software costs by 50%, save 75% in operational costs, have high technological accessibility, scalability and the flexibility to quickly access the necessary resources for your critical operational applications. I would be happy if I could tell something about the subject, even if I didn’t observe it. The choice is yours.

One thought on “What is Virtualization? What are the Types?”

  1. This is ensured after the tests performed, encapsulating all varied prospects and possibilities
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