VIRTUALIZATION A BEGINNERS GUIDE PDF
Virtualization - Beginner's myavr.info - Download as PDF File .pdf), Text File .txt) or read online. Virtualization. Virtualization For Dummies®, 2nd Sun and AMD Special Edition. Published by. Wiley Publishing, Inc. Chapter 1: Wrapping Your Head around Virtualization 3 . These tips can help save you time, effort, or A beginner can start with a. Virtualization: a beginner's guide · Read more Virtualization, A Beginners Guide · Read more Microsoft Application Virtualization Advanced Guide.
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Virtualization, A Beginner's Guide: Computer Science Books @ myavr.info 1. Introduction to Virtualization. Paul A. Strassmann. George Mason University. October 29, , to PM. After Virtualization: • Hardware-independence of operating system and applications. • Virtual machines can be provisioned to any system. • Can manage OS and.
Depending on the technology used, a hypervisor can be both a separate software system installed directly on hardware, and a part of the OS. A curious reader, who loves buzz words, after a couple of paragraphs will start to mumble that his favorite Docker-containers are virtualization, too. We will talk about container technologies next time, but yes, curious reader, you're right, containers are kind of virtualization, but on one and the same operating system resources level.
There are the three ways of communication between VMs and hardware: Dynamic translation In this case, VMs are not aware that they are, in fact, virtual. The hypervisor catches all commands from the VM on the fly and processes them, replacing with the safer ones, then returns them back to the VM.
Such an approach, evidently, suffers some performance problems, but instead it allows to virtualize any OS, as the guest OS doesn't need modifications. Dynamic translation is used by VMWare — a leader in commercial virtualization software. Paravirtualization In case of paravirtualization, the source code of the guest OS is modified on purpose, so that all the directives would be executed in the most effective way and safely.
At that, a VM is always aware that it's virtual.
Advantages — improved performance. Disadvantages — you can't virtualize, say, MacOS or Windows, or any other OS, which sources you don't have the access to, this way.
Paravirtualization is, one way or another, used in Xen and KVM, for example. Hardware virtualization The processors creators have realized in time, that x86 architecture doesn't suit well for virtualization, as it was initially intended only for one OS at a time. That's why, already after the dynamic translation from VMWare and the paravirtualization from Xen had appeared, Intel and AMD started to produce processors with hardware-assisted virtualization.
At first it didn't improve performance much, because the main focus of the first releases was on processors architecture improvement. However, now, more than 10 years after Intel VT-x and AMD-V had appeared, hardware virtualization doesn't concede but even succeed any other solutions.
Kernel-based Virtual Machine KVM is a solution for virtualization, embedded directly in the Linux kernel, which doesn't concede any other solutions in functionality and succeeds them in usability.
Moreover, KVM is an open-source technology, which, though, is pushed forward at full speed both in terms of writing the code and marketing by Red Hat and implemented in Red Hat's products.
This, by the way, is one of the many reasons why we insist on Red Hat distributives. KVM creators, at first, focused on hardware virtualization and didn't start to re-invent other things. Hypervisor is, in itself, a small operating system, which has to be able to work with the memory, network, etc. Linux already does all this perfectly well, that's why using the Linux kernel as a hypervisor is a logical and effective solution.
We will talk about SELinux and CGroups in another article, don't be scared if these words don't mean anything to you. KVM isn't just working as a part of the Linux kernel: starting with a kernel of version 2.
In other words, if you have Linux installed, you already have KVM. Convenient, right?
It's worth mentioning that in the field of public cloud platforms Xen dominates more that completely. It's because Xen appeared earlier than others and first achieved a sufficient level of performance. You can also remotely connect to virtual machines via secure channels. By the way, Red Hat is the libvirt's developer. Have you already installed Fedora Workstation as your main OS?
There are a lot of options. We will use several basic tools. Other Linux distributives can have some differences. Design review sessions for geographically dispersed teams can be started instantly.
With one central data centre serving several satellite offices data does not need to be replicated between sites. It is even possible to collaborate across continents, with architects, engineers and contractors all using the same data centre.
In this case though, attribution of software and hardware costs needs to be considered. Of course, network performance, particularly over WAN, is very important. This is governed by both latency reaction time, measured in milliseconds and bandwidth the data rate, measured in Gigabits per second. Host machines can be thousands of miles away, but the closer they are to the end user, the lower the latency and better the user experience.
No one likes to feel a lag between moving the mouse and seeing the 3D CAD model rotate on screen.
Virtualization basics and an introduction to KVM
An MPLS Multiprotocol Label Switching private connection which does not route through public channels is often recommended when working between offices, though it can work on the open Internet, even 3G and 4G.
WAN optimisation solutions, such as those offered by Riverbed, can also help. Deploying centralised workstations can be a complex process and specialist consultants are usually recommended. However, once the data centre is set up and optimised for CAD workflows the day-to-day management of workstations resources can be much easier than with distributed personal workstations.
IT administrators do not have to worry about maintaining individual machines spread across multiple sites. Service packs, fixes and upgrades can all be carried out in one place — inside the data centre, rather than scrambling about under desks. In addition, ultra low wattage zero clients that sit on desks require little to no maintenance and, as they are passively cooled, completely remove heat and noise from the design office.
New workstations can be spawned on demand, as and when projects dictate or workforces scale. There is no need to worry about the availability of local CAD-capable workstations. With zero clients on the desktop, should one fail, replace it with a new one in minutes, without even dropping the CAD session. Workstations used to be the preserve of the hardcore CAD user as their high cost was hard to justify for part time users. As a result project managers and other senior staff usually made do with office PCs or laptops.
Now they can be get access to a shared pool of high-end workstations on demand, as and when required. With centralised workstations CAD users are no longer chained to their desks. Bandwidth and latency permitting, an architect can use the same high-performance CAD workstation from pretty much anywhere. Workstation virtualisation There are a number of ways centralised workstations can be deployed. In the most simple form, the designer has access to a dedicated machine that just happens to be in the data centre rather than under his or her desk.
A one-to-one connection to a 1U or 2U workstation is a good solution for particularly demanding 3D applications — 3ds Max, for example — but it does not make the best use of rack space or resources if you want to deliver BIM applications to lots of users. For AEC firms to really get the most out of centralised workstations, the workstation or server needs to be virtualised. The main players in this space are Citrix, VMware, Microsoft and Teradici, not counting the manufacturers of the workstations and servers themselves, of which there are many.
Each user has access to his or her own virtual machine VM with its own desktop operating system and CAD applications. As the entire desktop is hosted inside the data centre the client requirements can be very low. In fact, zero clients with little to no processing, storage and memory, and no host operating system are often used.
VMs can be persistent. However, pooling VMs and assigning profiles to suit changing workflows often makes the best use of resources. While deployment of CPU, memory and storage is relatively standard in a centralised workstation or server, things get a bit more complex when it comes to the GPU — the all-important processor that makes it possible to run 3D graphics-intensive applications in virtualised environments.
GPU pass through is traditionally handled by a number of add-in graphics cards — think Nvidia Quadro or AMD FirePro — the exact same cards you would find in a desktop workstation.
A centralised workstation can typically host four of these CAD-optimised graphics cards. Virtual GPU, on the other hand, is all about flexibility and maximising the density of 3D users on a workstation or server. Ensuring some memory space exists before halting services until memory frees up. Access to more memory than the chassis can physically allow.
Advanced server virtualization functions, like live migrations. What is Storage Virtualization? Historically, there has been a strong link between the physical host and the locally installed storage devices. However, that paradigm is changing drastically, almost to the point that local storage is no longer needed. As technology progresses, more advanced storage devices are coming to the market that provide more functionality, and serve to obsolete local storage. Storage virtualization is a major component in storage best practices for servers, in the form of controllers and functional RAID levels.
Operating systems and applications with raw device access prefer to write directly to the disks themselves. The controllers configure the local storage in RAID groups and present the storage to the operating system as a volume or multiple volumes, depending on the configuration.
The operating system issues storage commands to the volumes, thinking that it is writing directly to the disk. However, the storage has been abstracted and the controller is determining how to write the data or retrieve the requested data for the operating system.
Storage virtualization is becoming more and more present in various other forms: File servers: The operating system is writing to a remote location with no need to understand how to write to the physical media. However, the data is stored in a large variety of disparate locations and medium.
The requester has no idea where the data exists; that is handled by the NFS server. However, the composition of the filesystem is differing file shares on the network.
The filesystem appears to be a single volume, but it is comprised of multiple locations. SAN technologies receive operating instructions as if the storage was a locally attached device.
Storage Pools: Enterprise level storage devices can aggregate common storage devices, in the form of like disk types speeds and capacity , to present an abstracted view of the storage environment for administrators to handle. The storage device handles which disks to place the data upon, versus the storage administrator deciding how to divide the available disks.
This usually leads to higher reliability and performance as more disks are used. Storage Tiering: Utilizing the storage pool concept as a stepping stone, storage tiering analyzes most commonly used data and places it on the highest performing storage pool.
The lowest used data is placed on the weakest performing storage pool.
This operation is done automatically and without any interruption of service to the data consumer. In the event of a host failure, the data is not necessarily compromised.
An absolute beginner's guide to Microsoft Hyper-V
The storage devices are able to perform advanced functions like deduplication, replication, thin provisioning, and disaster recovery functionality. By abstracting the storage level, IT operations can become more flexible in how storage is partitioned, provided, and protected. What is Data Virtualization? Data exists in many forms in our environments. Sometimes the data is static or dynamic.
Sometimes the data is stored in a database or in a flat file. Sometimes the data resides in the accounting system or the operations system.
Sometimes the data is in Asia or Europe. Sometimes the data is integer based or string based. Managing data location and availability can be difficult when trying to pull from many sources to analyze the data.
Data virtualization deals with the ability to abstract the actual location, access method and data types, and allow the end user to focus on the data itself. These tools are configured with various data sources that can aggregate the data into a single point for analysts to utilize. Data sources may include database connectors, APIs, website data, sensor data, file repositories, and application integrations.
The analysts do not need to know where the data comes from, only that it exists and is correct. Benefits of Data Virtualization Benefits to data virtualization include: Less end user domain knowledge of where the data is. Techniques for connecting to various sources may require higher technical skills, security levels, and understanding of how the data is stored.
Focus on correctly analyzing the data. The end user is spending their time focusing on their specific role or function and not worrying about how the data arrives, just that it does. What is Network Virtualization? Virtualization can be seen as abstraction and creation of multiple logical systems on a single physical platform. For network virtualization this remains true, although not so clearly as server virtualization.
Networking devices utilize both paravirtualization and hypervisor techniques. The first is loosely based on the idea of paravirtualization, where the underlying software is creating a separate forwarding table for each virtual network, such as is done by MPLS within each VRF.
BGP is used to update the database, and shares the routes AND the tags to distribute the data throughout the network. In the second type of hypervisor, the network device OS instantiates multiple instances of the OS.Well, it depends on how powerful your server hardware is, and on how demanding your workloads are. As an alternative, Hyper-V is also included with Windows Server and higher , and with some desktop versions of Windows.
The operating system issues storage commands to the volumes, thinking that it is writing directly to the disk. BI tools.
D.O.W.N.L.O.A.D [P.D.F] Virtualization, A Beginner s Guide [E.P.U.B]
Let's assume that you are young, but still poor student, and that means you have only PC on Windows and PS4 from all possible platforms. The appliance features all the software and hardware needed to deploy a CAD-focused virtual workstation solution. What is Network Virtualization?
The VMware vSphere stack comprises virtualization, management, and interface layers. Lets take a look at each of these benefits in more detail.
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