Examining The Types Of Transaction Processing System Information Technology Essay

Examining The Types Of Transaction Processing System Information Technology Essay A transaction is any event, the real test, the data created or modified before storing in an information system through Transaction processing features Business success depends on reliable transaction processing to ensure that orders reach customers on time, and that partners and suppliers paid and can afford. The range of transaction processing is, therefore, led to a lively part of effective corporate governance, organizations like the Association of Labour Process Improvement and Transaction Processing Performance Council Systems transaction processing companies provide the means to ensure a smooth fast transaction processing for debit and development processes across the enterprise. Usually, a TPS will have the following characteristics: A supercomputing Rapid processing of transactions is critical to the success of any business now more than ever, given the developments in technology and customer demand for immediate action. TPS systems have been developed to trade almost immediately to ensure that customer data available to the processes they need. Reliability Similarly, customers do not tolerate mistakes. TPS systems must be designed not only to trade I was never able to pass through the net, but the systems remain permanently even in operation. TPS systems, therefore, are developed to integrate complete security monitoring systems and disaster recovery. These measures maintain the failure rate is within tolerance. Standardization Transactions should be processed in the same way each time to maximize efficiency. To ensure this, TPS interfaces are developed to obtain identical data for each transaction, regardless of the client. Controlled access Since the TPS can be systems such as a powerful business tool, access should be limited to only those employees who require their use. Limited access to the system ensures that employees, their qualifications and ability to control, can not affect the failure of the transaction. Qualifying transaction processing To qualify for TPS, transactions must pass through the acid test. ACID tests associated with the following four conditions: Individuality Atomicity means that a transaction is either completed or not at all. For example, if the money will be transferred from one account to another, it will not become a bone fide transactions, even though both withdrawal and deposit. If an account is charged and others are not appropriated can not be regarded as a measure. TPS systems to ensure that transactions take place in its entirety. Consistency TPS systems in a number of operating rules (or constraints). If you find a cap that all transactions must have a positive value in a database for each transaction will be rejected with a negative value. Isolation Transactions must be entered in a vacuum instead. For example, if you do a fund between the two accounts of debit and credit is made by others seem to take place simultaneously. Funds may be credited to the account before being loaded onto another. Resistance Once the transaction can not be undone. To ensure that this happens even if a loss of TPS, a document file created by the completion of all transactions. These four conditions TPS systems to engage in a systematic, standardized and reliable. Types of transactions The settlement process should be standardized in order to maximize efficiency, each requires a custom transaction process in accordance with business strategies and processes. For this reason, there are two types of operations: Batch processing batch processing is a resource-saving move, the processing of data at preset. batch processing is useful for companies who need to process large volumes of data using limited resources. Examples include processing transactions for credit card transactions monthly batch processed in real time. Credit card transactions are made only once a month to produce an explanation for the customer, batch processing saves computational resources to process separately for each transaction. Real-time processing In many cases, the most important factor is speed. For example, if a bank customer receives a sum of money in the account, it is important to keep processing transactions and updating account balance as soon as possible so that a part of both Bank and client funds. Database Management Issues The purpose of this book are correct and up to date understanding and appreciation for the practical aspects of critical yet poorly understood key aspects of the database. It identifies and explains some basic concepts, principles and techniques constantly causing trouble for users and suppliers. Evaluate the treatment of these topics in SQL (standard and commercial applications) and provides specific guidance and practical advice on how to handle (and how not to). Includes carefully, especially thin and misunderstood issues complex data types, missing information, data depends on the question hierarchies and so on -. Clear and concise format for busy professional database Three decades ago relational technology put the database field on a sound scientific basis for the first time. But database industry producers, users, experts and media has failed, in essence, principles, focusing instead on a cookbook approach to product without conceptual understanding. The consequences have been costly: DBMS products, databases, applications and development tools are not always perform up to expectation or potential, and may encourage the wrong questions and incorrect answers. Practical issues in database management is an attempt to create these persistent and costly problem. Written for database designers, developers, managers and users, it addresses the basic, often recurring problems and problems that practitioners even the most experienced here seem to systematically misunderstand, namely: à ¢Ã¢â€š ¬Ã‚ ¢ Unstructured data and complex data types à ¢Ã¢â€š ¬Ã‚ ¢ business rules and implementation of integrity à ¢Ã¢â€š ¬Ã‚ ¢ Buttons à ¢Ã¢â€š ¬Ã‚ ¢ Copy à ¢Ã¢â€š ¬Ã‚ ¢ Normalization and denormalization à ¢Ã¢â€š ¬Ã‚ ¢ Entity subtypes and supertypes à ¢Ã¢â€š ¬Ã‚ ¢ data hierarchies and recursive queries à ¢Ã¢â€š ¬Ã‚ ¢ Redundancy à ¢Ã¢â€š ¬Ã‚ ¢ Share query à ¢Ã¢â€š ¬Ã‚ ¢ lack of information Fabian Pascal examine these critical issues in detail, comparing the cost of serious mistreatment of the practical benefits of implementing the right solutions. With a focus on principles and practices used examples Practice problems in the real world database to provide an assessment of current technology SQL-based DBMS products and, if possible, provide concrete recommendations and solutions. From the insight provided by practical problems in database management, youll be in better position to evaluate these products, use their skills and weaknesses to avoid. Database Architecture database professionals today are faced with more choices when you consider the use of architecture to meet the different needs of employers and / or address of the customer. The text below provides an overview of three main types of database architectures and sub-categories, as well as provide an insight into the strengths of each. Application logic The database architecture is based on how the application logic is distributed throughout the system can be distinguished. Application logic consists of three elements: presentation logic, processing logic and logical storage. Presentation logic component is responsible for formatting and presenting data on the screen of the data processing logic manages user data processing logic, business rules, logic and data management logic. Finally, the logical storage unit that is responsible for the storage and retrieval of current devices, such as a hard disk or RAM. In determining the level (s) of these components, we develop a good idea what kind of architecture and subtype can be achieved. A tier architecture Imagine a person on a desktop computer to load Microsoft Access, a list of personal addresses and phone numbers he or she has stored in MS Windows My Documents folder is used. This is an example of database-tier architecture. Program (Microsoft Access) to operate the local users computer, and points to a file stored on the hard disk of the machine, so that access to a unique natural resource and process information. Another example of a one-tier architecture is a file-server architecture. In this scenario, a database of the group from a shared location on a computer are stored. Members of a group working with a software package such as Microsoft Access, to upload data and process them locally on your computer. In this case, the data may be shared between users, but all processing is performed on the local computer. In fact, only one file server external hard drive from which files are recovered. Another way of architecture level showed that the mainframe computer. In this system obsolete, large machines can direct terminal ill with the tools to open, view and manage data. Although this system as a client-server, since all the computing power (both data and applications) is made from a single computer, we have a one-tier architecture. The architecture can be beneficial when dealing with data from a particular user (or small number of users), and a relatively small amount of data. We are going to implement something cheap and clean. Two Tier Client/Server Architectures A two-tier architecture is one that is familiar to many of todays computer users.   A common implementation of this type of system is that of a Microsoft Windows based client program that accesses a server database such as Oracle or SQL Server.   Users interact through a GUI (Graphical User Interface) to communicate with the database server across a network via SQL (Structured Query Language). In two-tier architectures it is important to note that two configurations exist.   A thin-client (fat-server) configuration exists when most of the processing occurs on the server tier.   Conversely, a fat-client (thin-server) configuration exists when most of the processing occurs on the client machine. Another example of a two-tier architecture can be seen in web-based database applications.   In this case, users interact with the database through applications that are hosted on a web-server and displayed through a web-browser such as Internet Explorer. The web server processes the web application, which can be written in a language such as PHP or ASP.   The web app connects to a database server to pass along SQL statements which in turn are used to access, view, and modify data.   The DB server then passes back the requested data which is then formatted by the web server for the user. Although this appears to be a three-tier system because of the number of machines required to complete the process, it is not.   The web-server does not normally house any of the business rules and therefore should be considered part of the client tier in partnership with the web-browser. Two-tier architectures can prove to be beneficial when we have a relatively small number of users on the system (100-150) and we desire an increased level of scalability. http://www.windowsecurity.com/img/upl/image0011173862784565.gif Two-Tier Client-Server Architecture http://www.windowsecurity.com/img/upl/image0021173862784580.gif Web-Based, Two-Tier Client-Server Architecture N-Tier Client/Server Architectures Most n-tier database architectures exist in a three-tier configuration. In this architecture the client/server model expands to include a middle tier (business tier), which is an application server that houses the business logic.   This middle tier relieves the client application(s) and database server of some of their processing duties by translating client calls into database queries and translating data from the database into client data in return.   Consequently, the client and server never talk directly to one-another. A variation of the n-tier architecture is the web-based n-tier application.   These systems combine the scalability benefits of n-tier client/server systems with the rich user interface of web-based systems. Because the middle tier in a three-tier architecture contains the business logic, there is greatly increased scalability and isolation of the business logic, as well as added flexibility in the choice of database vendors. http://www.windowsecurity.com/img/upl/image0031173862902205.gif Three-Tier Client-Server Architecture http://www.windowsecurity.com/img/upl/image0041173862902221.gif Web-Based, Three-Tier Client Server Architecture

What is civilisation ?

Asia but the crucial area for its development was the fertile crescent. China and America soon followed with the development of agriculture. Agriculture is the first sign that shows humans beginning to control nature. When enough food was available, people started settling down resulting into more complex developments belonging to civilization. Soon after settling down the domestication of animals began, Only 14 of the animals urine that time were suitable for domestication. Mom requirements for the animals (not all animals had all these attributes) were: Power used in travel and agriculture (e. G. Horse), relatively short maturing time, the ability to produce food such as milk or honey. After these Important developments the wheel, writing, pottery, metaphorically and highly complex houses and monuments were built. This was mostly due to the time people now had (thanks to agriculture and the domestication of animals) to think rather than hunt and gather. Along with highly developed physical objects/items also employ social methods thrived.A sophisticated legal system was formed to solve issues and labor was devised between people (instead of everyone doing the same work). Writing was invented and along with this the study of nature and education became recognized. Philosophical ideas grew and became morals for people. A large piece of our civilization Is due to luck In where our ancestors decided to settle down. We can still see some affects of it today, such as the difference between America (America had very protein rich food) and New Guiana (New Guiana 1 OFF ere ideal the population of a civilization started to grow.Mortality went down but then again disease spread more eagerly. When population grew, a certain hierarchy grew along it. Hierarchy was also present during the Paleolithic age, but now there were more factors and professions that could be classed. People who had some special skill or profession were respected (e. G. Priest or a person who could w rite). Religion and politics were more separate than before as well. Civilization can never be simply defined, as people have very different views on it. Different subcultures and tribes may have their own concept of it.The standard western definition in my opinion is this: A collection of many factors that enable us to be in control of our surroundings (nature, animals our social lives) and where technology, systems and living conditions are highly advanced. A large population is needed to sustain all these systems. My view and differences between sources In the PDF file about ancient Mesopotamia and Egypt most facts are told without much further explanation or criticism. During our classes Vive noticed, that we must question things to find the best definition for ourselves.Overall there aren't many differences between the â€Å"facts† told to us from both sources. I enjoy both methods thoroughly and they give a very clear explanation together. One main impact of civilizatio n is that it makes our lives easier via all the inventions. Many people don't take care of their physical health even though, ! 2 Homo Sapiens were built to hunt and gather. One aspect of civilization, domestication, is useful if not necessary, but it's MIS-used and we're killing the planet that we live in (high ICC emissions, cutting down rain forests).We should take example from uncivilized people who mostly respect nature and live mainly on it's demands. These people could teach us a lot about communication, and how life could be better in general (by being more simple without advanced technology). In my view humans should create more echo-friendly technology and should consume less (e. G. Food and clothes). Civilization shouldn't go back in time to when it was â€Å"better† ,but instead be offered to all those who want it, and develop more ideas and inventions that compromise between us and nature.

Do You Know Where You Are in the Universe

Where are you in the cosmos? Do you know your cosmic address? Where is it? Interesting questions, and it turns out astronomy has some good answers for them! Its not as simple as saying, the center of the cosmos, since were not really central to the universe. The true address for us and our planet is a bit more complicated. If you had to write down your full address, youd include your street, house or apartment number, city, and country. Send a message to another star, and you add on the Solar System to your address. Write a greeting to someone in the Andromeda Galaxy (some 2.5 million light-years away from us), and youd have to add Milky Way to your address.  That same message, sent across the universe to a distant cluster of galaxies would add another line that said  The Local Group. Finding Our Local Groups Address What if you had to send your greetings across the universe? Then, youd need to add the name Laniakea to the next  address line. Thats the supercluster our Milky Way is part of — a  huge collection of 100,000 galaxies (and the mass of a hundred quadrillion Suns) gathered together in a volume of space 500 million light-years across. The world Laniakea  means immense heaven in the Hawaiian language and is meant to honor Polynesian navigators who used their knowledge of the stars to go voyaging across the Pacific Ocean. It seems like a perfect fit for humans, who are also voyaging the cosmos by observing it with ever-more-sensitive telescopes and spacecraft. The universe is full of these galaxy  superclusters that make up what is known as the large-scale structure. Galaxies arent scattered randomly in space, as astronomers once thought. Theyre in groups, such as the Local Group (home of the Milky Way). It contains dozens of galaxies, including the Andromeda Galaxy and the Magellanic Clouds (irregularly shaped galaxies that can be seen from the Southern Hemisphere). The Local Group is part of a larger collective called the Virgo Supercluster, which also contains the Virgo Cluster. The Virgo Supercluster itself is a small part of Laniakea. Laniakea and the Great Attractor Inside Laniakea, galaxies follow paths that all seem to be directed toward something called the Great Attractor. Think of those paths as acting like streams of water descending a mountainside. The region of the Great Attractor is where the motions in Laniakea are directed. This region of space lies about 150-250 million light-years away from the Milky Way. It was discovered in the early 1970s  when astronomers noticed that the rate of  expansion  of the universe was not as uniform as theories suggested. The presence of the Great Attractor explains localized variations in the velocities of galaxies as they move away from us. The rate of a galaxys motion away from us is called its recession velocity, or its redshift. The variations indicated something massive was influencing the galaxy velocities.   The Great Attractor  is often referred to as a gravity anomaly — a localized concentration of mass tens or thousands more than the mass of the Milky Way. All that mass has a strong gravitational pull, which is shaping and directing Laniakea and its galaxies. Whats it made of? Galaxies? No one is sure yet.   Astronomers mapped Laniakea by using radio telescopes to chart the velocities of the galaxies and clusters of galaxies it contains. The  analysis of their data  shows that Laniakea is headed toward the direction of another large collection of galaxies called the Shapley Supercluster. It may turn out that both Shapley and Laniakea are part of an even larger strand in the cosmic web that astronomers have yet to map. If that turns out to be true, then well have yet another address line to add below the name Laniakea.

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