lec8

is the process of running a virtual instance of a computer system in a layer
abstracted from the actual hardware.

is the creation of a virtual rather than actual uses software that simulates hardware functionality to create a virtual system.

is technology that lets you create useful IT services using resources that are
traditionally bound to hardware.

It allows you to use a physical machine’s full capacity by distributing its capabilities
among many users or environments.

method of combining the available resources in a network by splitting up the
available bandwidth into channels
is the transformation of a network that was once hardware-dependent
describes hardware, software, and network functionality combined into a single,
virtual network.
This allows developers and engineers to test software that is under development or
in the simulation stage

software-based administrative entity…combining hardware and
software network resources into a single

software containers replicate single network functionality

combines multiple local networks into a single “virtual” network to improve the network efficiency.

treat data as a dynamic supply providing processing capabilities that can bring
together data from multiple sources
is abstracting the traditional technical details of data and data management

included as part of a business intelligence (BI) tools semantic universe layer or is a new module offered by a predominantly BI vendor
is able to combine multiple sources (limited list of structured or big data) to feed the BI tools. Their output may not support operational data.

typically these are offered for additional cost by Data Integration Suite (ETL /
MDM / Data Quality) or Data Warehouse vendors. The suite is usually very
strong in other areas.

This is an emerging offering particularly among Big Data and Hadoop vendors.
These products "virtualize" the underlying big data technologies and allow them
to be combined with relational data sources and flat files and queried using
standard SQL.

These products are often deployed in the cloud and have pre-packaged
integrations to SaaS and cloud applications, cloud databases and few desktop
and on-premise tools like Excel.

Built from the ground-up to provide data virtualization capabilities for the
enterprise in a many-to-many fashion through a unified "virtual" data layer.
Designed for agility and speed in a wide range of use cases, agnostic to
sources and consumers, and competes and collaborates with other less
efficient middleware.

the most common form, involves running multiple os instances on a single machine

VMware Workstation software is used to virtualize Linux systems.

there is a need to install VMware software firstly.

utilizes by a single client or single organization.

uses by multiple clients at the same time.

It is often referred to as ‘advanced load balancing,’ as it spreads applications across
servers, and servers across applications.

one of the least-known forms of virtualization
deployed in the process of providing administrative roles to various users of a
system. Mostly used in data centers to define the roles of users

is implemented using hypervisor ← virtual machine manager.
It is the abstraction of computing resources from the software that uses cloud
resources. It involves embedding virtual machine software into the server's
hardware components

manages the shared physical hardware resources between the guest OS & the host OS

fully virtualizes the main physical server to support applications and software

imitate certain factual or illusory hardware requiring the valid resources from the
host

runs modified versions of operating systems

specially intended to grant the necessary security and separation to run manifold applications and replicas of the same operating system on the same server.

process of pooling physical storage of multiple network facilitates archiving, easy backup, and recovery tasks is an array of servers that are managed by a virtual storage system

- This type of virtualization works before the file system exists. It replaces controllers and takes over at the disk level.

- The server that uses the storage must have software installed on it in order to enable file-level usage.

- The host operating system must have a driver installed to intercept and redirect IO requests.

basically removes the dependencies caused in accessing the data at file level to that of the location where they are actually present.

With network-based storage, a fiber channel switch is placed between the host and storage. This switch virtualizes and redirects all IO requests. Operating systems are not a factor with networkbased storage.

With array-based virtualization a single master array handles all the IO requests for all arrays in the system. This type of storage virtualization allows for the seamless centralized management and data migration.

are any costs that require paying actual money to an entity. Hard costs are often associated with a specific product and service

are typically associated with internal personnel or internal services for which no explicit chargeback system is in place. Soft costs are what the organization spends on an ongoing basis doing its daily work.

refers to the work done by internal personnel keeping the technology infrastructure humming along

refers to creating a secure copy of the data on individual machines