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Web Hosting - Redundancy and Failover
Among the more useful innovations in computing, actually invented decades ago, are the twin ideas of redundancy and failover. These fancy words name very common sense concepts. When one computer (or part) fails, switch to another. Doing that seamlessly and quickly versus slowly with disruption defines one difference between good hosting and bad.
Network redundancy is the most widely used example. The Internet is just that, an inter-connected set of networks. Between and within networks are paths that make possible page requests, file transfers and data movement from one spot (called a 'node') to the next. If you have two or more paths between a user's computer and the server, one becoming unavailable is not much of a problem. Closing one street is not so bad, if you can drive down another just as easily.
Of course, there's the catch: 'just as easily'. When one path fails, the total load (the amount of data requested and by how many within what time frame) doesn't change. Now the same number of 'cars' are using fewer 'roads'. That can lead to traffic jams.
A very different, but related, phenomenon occurs when there suddenly become more 'cars', as happens in a massively widespread virus attack, for example. Then, a large number of useless and destructive programs are running around flooding the network. Making the situation worse, at a certain point, parts of the networks may shut down to prevent further spread, producing more 'cars' on now-fewer 'roads'.
A related form of redundancy and failover can be carried out with servers, which are in essence the 'end-nodes' of a network path.
Servers can fail because of a hard drive failure, motherboard overheating, memory malfunction, operating system bug, web server software overload or any of a hundred other causes. Whatever the cause, when two or more servers are configured so that another can take up the slack from one that's failed, that is redundancy.
That is more difficult to achieve than network redundancy, but it is still very common. Not as common as it should be, since many times a failed server is just re-booted or replaced or repaired with another piece of hardware. But, more sophisticated web hosting companies will have such redundancy in place.
And that's one lesson for anyone considering which web hosting company may offer superior service over another (similarly priced) company. Look at which company can offer competent assistance when things fail, as they always do sooner or later.
One company may have a habit of simply re-booting. Others may have redundant disk arrays. Hardware containing multiple disk drives to which the server has access allows for one or more drives to fail without bringing the system down. The failed drive is replaced and no one but the administrator is even aware there was a problem.
Still other companies may have still more sophisticated systems in place. Failover servers that take up the load of a crashed computer, without the end-user seeing anything are possible. In fact, in better installations, they're the norm. When they're in place, the user has at most only to refresh his or her browser and, bingo, everything is fine.
The more a web site owner knows about redundancy and failover, the better he or she can understand why things go wrong, and what options are available when they do. That knowledge can lead to better choices for a better web site experience.
The Definition of Writing Styles Depends on Who is Defining Them (writing styles) While researching this topic, you may have found many different answers to what are the different types of writing styles. No two answers were the same. They range anywhere from your personal way of writing that is your writing style to formal and informal. Many people feel the best answer to what writing styles are the those will be outlined below in this article. You can decide for yourself if this definition suits your. The term creative writing covers a range of writing areas. Poetry, fiction books, short stories, and screenplays are considered creative writings. Any writing in which is not strictly non-fiction would be classified as such. Journalism and news reporting are forms of Expository writing. The purpose is to focus on one topic and inform the reader by provided the facts. These writings can be seen in the forms of travel brochures, professional journal, business reports, and new paper articles. Descriptive writing is what gives you the mental pictures of what we have read. It uses a lot of adjective and adverbs to describe things. When descriptive writing is very good you can close your eyes and know exactly what the author is saying. The kind that makes you taste what the characters and see what they are seeing. Analytical Writing is a writing that focuses on a topic and then verifies the purpose of it. It is often taught school age children through out the years because it is something they will use in their life. Book reports, conference papers, thesis, essays, and dissertations are all academic writing. It is created using a third person point of view and deductive reasoning supported by facts. Its purpose is to show a clear understanding of a subject by presenting information. Technical Writing is used in owner manuals, how to guides, magazine articles, and design specs just to name a few. Its purpose is to take complicated technical information and turn it into something the intended audience can understand. Technical writing usually deals with electronics of all sorts, chemistry, robotics, and finance. Any kind of writing that has to do with business matters is considered business writing. It is concise and to the point. Your intended audience wants to know what happen and why, but with minimal detail in between. An active voice is necessary in business writing. It keeps people focused and shows that you are in control of situations. Correspondence is the writing of memos, letters, or emails between people. It is a message that is sent between two people or groups of people. To provide facts and statistic and having the ability to influence your readers with your words is persuasive writing. This is used for products ads, political campaigns, or any kind of promotion. It is not necessary to prove why something is else is wrong or bad you just need to prove why your promoting is better. Narrative writing is use to tell a story or list of events that have already happen, might have happened, or could happen in the future. These writings may include novels, poetry, short stories, or a number of other things. A lot of times many of these styles are meshed together in our writing. Business writing and technical writings are often one in the same as are academic writing and analytical writing. With the overlapping of the styles it hard to define one writing style from another, you can guess it is all a matter of the point of view you are looking at it from and your opinion. What is copyright infringement What Is Copyright Infringement? The Layperson's Copyright Primer Copyright laws are constantly changing, and knowing exactly what copyright infringement is, whether you’re creating an eBook, publishing articles, using music as a backtrack to your podcast - or what have you - is essential to selling your online media. Although the laws change from one jurisdiction to another, knowing the basic rules of copyright infringement will ensure you’re following the proper rules of engagement when it comes to creating your works. Before you make any final decisions regarding the use of a work that has been copyrighted, please contact a copyright attorney to ensure you’re following the law – this will keep you from being sued or, even worse, punished in a court of law. What is Copyright Infringement? Copyright infringement, as defined by Wikipedia.org, states: “Copyright infringement (or copyright violation) is the unauthorized use of material that is protected by intellectual property rights law particularly the copyright in a manner that violates one of the original copyright owner's exclusive rights, such as the right to reproduce or perform the copyrighted work, or to make derivative works that build upon it. The slang term bootleg (derived from the use of the shank of a boot for the purposes of smuggling) is often used to describe illicitly copied material.” So, what is copyright infringement in plain English? It means that if you’re not allowed to use something, then don’t use it – plain and simple. It can be very simple to get permission to use a work – many times you’ll be able to use a ‘sample’ of music or excerpt of written work for a nominal fee, or small attribution. However, if you do not have the permission of the copyright holder – whether it’s an author or a publishing house – you can be sued for copyright infringement or worse. What is Copyright Infringement in America? In many jurisdictions, such as the United States of America, this act is known as a strict liability crime or tort (a tort is a civil wrong – not a criminal wrong). This means that the person who infringes the copyright - whether intentionally or not - will be responsible for the damage or loss. Also, the prosecutor (in criminal court) or plaintiff (in civil court) must only prove that the act of copying was committed by the defendant – they do not need to prove guilty intent. This means, even if you had no intention of committing copyright fraud or infringement, you can (and in present times, in many cases, WILL) be prosecuted, even if you used the material in good faith. What is Copyright Infringement in action? Many cases of copyright infringement are difficult to see to the layperson, because the violation is not limited to exact copying. In many cases, when something is inspired by another thing – such as in music, when the inspiration of one song is used to create an entirely different song – it’s difficult to see where the new product or ‘thing’ has crossed the line to something illegal. Some works aren’t even protected by copyright, such as compilation of facts that lack the creativity necessary to be covered by copyright, or works that are in the public domain because the copyright has expired. Knowing the difference is often very difficult to see, and because of this we’ve seen a number of copyright infringement cases in recent years, especially in tandem with the music industry. As you can see, copyright infringement is a very difficult, albeit necessary, act to define. However, if you make sure that you’re using works that are in the public domain, or have long since been out of copyright (think Beethoven or Frankenstein) you’ll be safe. Do you fair research, and if you have any questions contact a copyright lawyer and ask ‘what is copyright infringement’ to learn the most up-to-date information for your jurisdiction. |