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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 "Catch" to Some of these Freebie Sites Remember that old saying, "There's no such thing as a free lunch?" Well, it's not true—there are plenty of freebies out there. However, there are some things you should know about if you are going to go after these freebies. The World Wide Web is awash with web sites that like to offer visitors with loads of tempting freebies. But although many of these are legitimate offers, there are some things you should know about these freebie sites. Here are some things to know about these freebie sites. Getting Things for Free—A Caveat Here is the basic caveat when it comes to these freebie offers—there is usually something you will have to endure in order to get your freebie. Although you may not have to make any sort of financial contribution or monetary expense, you will have to pay in some small non-monetary way. Here is a quick rundown of various kinds of 'catches' that you may come across as you seek out the best of the web's freebies. Watching Ads Before You Get to the Good Stuff One of the most common techniques that websites will use before you can get access to their freebies is to force you to watch ads. There are many different versions of this method. Many sites that promote freebies will support their site through advertisements. Most advertisements show up as pop-up or banner ads. Some websites also use video websites. With the ubiquity of high speed Internet, video ads have lately become the preferred method of advertisement on many websites. The less subtle of these ads are the pop-up and banner ads. Pop-up ads are often quite obtrusive and they can interrupt your enjoyment of the website. You might want to avoid ad-based freebie sites at work, as these can often interfere with your screen. Many popular freebie websites also offer ad-free versions of their content. This may be something to consider if you really find the website's content valuable. Be Wary of Automatic E-mail Sign-Ups Many freebie websites will sign you up automatically for their email newsletters. The worst-case scenario is when the website allows its partners to bombard you with email ads. What is the best way to avoid getting on an unwanted email list? Read the fine print, and whenever you get the option, uncheck the opt-in box at the very bottom of the page. Take Care of Your Privacy Many sites that offer freebies make money by selling the personal information that they gain from their web traffic. In order to avoid having your personal information being sold, you should avoid giving your personal information to websites that can't provide you with an upfront privacy policy. You should also look for the TRUSTe seal that ensures your personal information is kept secure and private. Also, never provide more information than you need to provide. Avoid Large Downloads Whenever Possible Another thing you should watch out for are large downloads. Although there are many legitimate large downloads out there, you should avoid sites that don't tell you exactly what you are downloading, how long the download will take, and how big the file size is. Watch Out for Disappearing Websites If there is one thing to know about freebie websites is that they are often 'here today, gone tomorrow' type enterprises. Many freebie websites simply don't survive for very long. You should think hard before committing to a website that offers free services that you will have to depend on. The last thing you want is to depend on a website's services, and then have those services disappear or suspended. Copyright Law Plagiarism Plagiarism Is Simply Unethical Anyone who is a writer is concerned with plagiarism. Copyright Plagiarism Laws protects copyright holders from having their works plagiarized. Many people think it is ironic that the word plagiarism derives from “kidnapper” in Latin. However, it is true. If a person uses another person’s words without permission, they have indeed stolen or kidnapped something that was owned by another and is in violation of copyright law. Plagiarism is a very bad word in the writing world. Crediting the author of the work will not keep someone immune from being in violation of copyright law. Plagiarism is plagiarism, even if the author is cited if the author did not give permission for the work to be used. One of the most common areas that copyright law plagiarism is violated is in the academic world. Many students will copy and paste the information they need for their research papers and essays straight off the Internet and turn it in to their professors. However, this type of cheating is easily detected now with special programs that professors can use. Plagiarism is unethical, not only in the writing world, but in the academic world, as well. Did you know that you could plagiarism a work but not be in violation of the copyright? Likewise, you can be in violation of a copyright and not have been plagiarizing. It is really not that hard to understand. Let’s say you are using Abraham Lincoln’s exact words in a paper and you did not cite him as the source or give him credit. Well, Lincoln’s words aren’t copyrighted because they are in the public domain. But, you did plagiarize because you tried to pass off his words as your own. Alternatively, if you use a picture in a book and you did not gain permission to use the book, you have violated copyright law because you did not source the artist and you did not get permission from the artist to use the picture. If you are in school, the best way you can get around committing plagiarism is to simply list your sources. If you use someone’s word, list it in an endnote or in a footnote. List the resource you found it in the bibliography. Another way around copyright law plagiarism violations is to take notes when you are reading. Take notes in your own words and put the resource away. Write your paper from your own words. No one wants to be singled out for plagiarism, especially a student who is concerned about their reputation at school and writers who need to keep their credibility in good standing. With today’s technological advances, it is not too hard to pinpoint plagiarized work. Even webmasters who run websites are on to the plagiarism crowd. They can run their entire sites through a special program to see if their content has been stolen and duplicated elsewhere on the Internet. If you are dealing in the written word, either academically or as a profession, it is a good idea that you only use your own words. It was probably easier to get away with plagiarism 100 years ago, but it is not that easy today. The changes are very high that if you are caught violating copyright law plagiarism laws you will be caught. Not only is it embarrassing, but it can cost you a bundle in a lawsuit. |