Ch. 3 Operating Systems

Ch. 3 – Operating Systems

Operating System Software • Operating System (OS) – Software that ______of a computer

What is an operating system (OS)?

Software which manages the overall operation of the computer system including:

______

Software files (programs) which are stored on the hard disk

• ______with the internal programs

• ______

______

Kernel • Kernel – The internal part of the operating system. – Those software components that perform the basic functions required by the computer.

• ______

1 The functions of an operating system 1. Manages and Interacts with Computer Hardware

2. Provides and Manages System Security

3. Provides the System Interface

4. Provides the Interface for Application Software

1. Manages and Interacts with Computer Hardware

Manages the CPU

 What software programs the ______and when

Manages RAM - What is ______and where it is stored - Virtual memory - OS will send message when RAM is full

Provides the interface for storage devices and ______on those devices - in charge of formatting disks - creates sectors and clusters - creates F.A.T. or V.T.O.C. - sends message when disk is full or there is some other problem with writing data to the disk - virtual memory - CD-ROM, DVD-ROM - Flash drive

Provides the Interface for Input and Output Devices  keyboard, mouse, printer,  device drivers = software programs which allow the hardware device to be used by the operating system and by application software

Advantages/Disadvantages of Server Operating Systems

Advantages

 ______for the installation and administration of all software and data  More cost effective - less expensive than multiple computers (PCs, Macs)

Disadvantages

 ______ Loss of individual user control of their own software, data, and peripherals

2 2. Provides and Manages System Security

Single-user Operating Systems

 ______ user has full authority (usually)

Server Operating Systems

 ______capability  protection of user’s data stored on the server’s central hard disk drives  protection and security for software programs

3. Provides the System Interface

System Interface or shell = the interface between the user and the computer

______ Linux, UNIX, DOS, older OS’s

4. Provides the Interface for Application Software

Operating systems are ______

Operating systems are designed and developed for a specific CPU or “family of CPUs”

Application software is developed for an operating system

MS Word for Windows 7  Windows 7  Intel CPU

MS Word for the Macintosh  Macintosh OS X  Intel CPU

3 Virtualization, Cloud Computing and Big Data

Virtualization

Virtualization - Various techniques and methods of creating a virtual (rather than actual) version of something, such as:

 Computer hardware platform  Operating System (OS) – ______ Storage device  Network resources

Virtual Machine

 Software that supports multiple operating systems on a single computer.  Each operating system is it’s own “virtual machine” with it’s own:

• ______

A computer can run:

Multiple operating systems simultaneously including the

______

Zero Client (thin clients) just:  Connect to the network  Begins a networking protocol to communicate with the VM server  Displays the server's output:  Operating system, applications and data Basically the full OS and applications are run in ______

Fewer client “computers” means:  Less cost – fewer “computers”  Do not have to constantly upgrade computers or buy new computers  Easier installation of software and upgrading current software

 ______ Easier management of client computers

 Access ______from any device on the network.

4 Cloud Computing

Centralization – Looks familiar….  The mainframe computer has now become the “cloud”.

Cloud computing – Ability to run a program on many connected computers at the same time.  The popularity of the term is from the ability host application services so that the client can access from a remote location.  Also known as ______over a network

A data center is a specialized facility used to house computer systems and associated components, such as telecommunications and storage systems.

Cloud computing is ______in which large groups of remote servers are networked to allow the centralized data storage, and online access to computer services or resources.

Big data

Big data - The collection of data sets so large and complex that it becomes

______

______or traditional data processing applications.

 Challenges: How to capture, organize, store, search, share, transfer, analyze, and visualize.

 How to use larger data sets of information, analyze the information and use it to "spot business trends, determine quality of research, prevent diseases, link legal citations, combat and prevent crime, and

______.

Big Data (2012) Big Data Example Analyzing Data – RapidMiner

Meta Data

______is data that describes other data.  A metadata record is a file of information which captures the basic characteristics of a data or information resource.  Metadata is traditionally in the card catalogs of libraries.  Metadata describes how and when and by whom a particular set of data was collected, and how the data is formatted.