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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.
How to Avoid Spam and Junk Email and Still Enjoy Freebies Free stuff is great, but when you are facing an inbox that is literally choking on spam, than you may find yourself wondering just how free your freebies really are. Spam and junk email are the unwanted consequences of cashing in on great free deals online, and it is enough to keep some people away from freebie offers entirely. Here’s the good news, however – you might not able to stop the spammers in their tracks completely, but there are a lot of things you can do to keep the annoyance caused by junk email to a minimum. Get on the defensive and reclaim the control you have over your inbox. Rule number one for cashing in on freebies is to set up a separate email account that you use only for your free stuff hunting. There are tons of web based email programs that you can join for free, and you can use these new email accounts as your point of contact for the companies from who you get freebie offers. After all, giving your email address to a company is simply part of getting freebies – that is why the company is giving away freebies in the first place. They want to collect your email address so they can email you about their products and hopefully convince you to shell out some cash for them in the future. By protecting your main email address, you can easily control the amount of spam you have to wade through when you just want to read your personal or business emails. You know that a company wants your email address in a exchange for a freebie, and you know why they want it, but what you might not know is that not all companies are created equal when it comes to it how the treat your email address. To know this, you have to check out a company’s privacy policy. Some companies will allow you to opt out of all future emails, including the ones from them, meaning in theory that your email address should never end up on any junk email solicitation list after your get your freebie. Other companies don’t let you opt out of their emails, but they let you choose whether or not they can give your address to partner companies who have products to offer that you “might be interested in.” With these companies, at least you can keep the amount of solicitations to a minimum. Still other companies follow a “no holds barred” kind of plan, in which they are allowed to share your email address with anyone they choose. These last kinds of companies are the kinds that end up loading you up with the spam, because they often sell the lists of email addresses they collect to companies that send out spam messages. Proceed with caution when a company has a policy like this one. If you can’t find a privacy policy at all on the website from which you are getting your freebie, then it might be best to move on to a different free offer. Another spam reducing trick that a lot of people miss out on is ignoring spam completely. Don’t open your spam messages, and whatever you do, don’t ask to be removed from a mailing list. That might seem like the logical way to stop the spam, but all you do when you do that is confirm to the spammers that their email is going to a real, live person. Last but not least, if even your dedicated freebie email address is gasping under the pressure of the spam, abandon it and start a new one. If you collect freebies on a regular basis, the word will eventually get out and the junk emailers will find you. Start a new address and get a clean slate. Patent and copyright law Understanding Patent and Copyright Law Patent and copyright law gives the inventor the exclusive rights to the invention. No one else can produce the invention for a set period of time under patent and copyright law. Patent and copyright law is set up to protect inventors. The law on patents can be found in the United States Constitution, Article 1, Section 8 and in Title 35 of the United States Code. The agency that is in charge of patent laws is a Federal Agency known as the Patent and Trademark Office. Anyone who applies for a patent will have their application reviewed by an examiner. The examiner will decide if a patent should be granted to the inventor. Individuals who have their patent application turned down can appeal it to the Patents Office Board of Appeals. Just because someone has a patent does not mean that they have the right to use, make or sell the invention. For instance, if a drug company comes up with a new drug, they can get a patent on it. However, it would not be available to be sold to the general public until the drug becomes approved by other regulatory bodies. Likewise, someone may invent an improvement to an existing product, yet they will not be allowed to produce or sell the item until they obtain a license to do so from the owner of the original patent holder. For someone to receive a patent, as stated, they must fill out an application on their invention. The application will entail the details of the invention and how it is made. In addition, the person applying for a patent must make claims that point to what the applicant deems or regards as his or her invention. A patent may have many claims with it. The claims protect the patent owner and notify the public exactly what the individual has patented or owns. If someone infringes upon patent and copyright law, it is usually enforced in a civil court setting. The owner of the patent will generally bring a civil lawsuit against the person who has infringed upon their patent and ask for monetary compensation. In addition, the patent owner can seek an injunction which would prohibit the violator from continuing to engage in any acts that would infringe upon their patent in the future. Many patent owners will make licensing agreements (or contracts) with others. These agreements allow another person or company to use someone’s patented invention in return for royalties. In addition, some patent holders who are competitors may agree to license their patents to each other to expand both of their profits. Most everything we use in our day to day life was invented by someone. That person had to seek out a patent for their invention. Patent and copyright law protects inventors from having their ideas and inventions stolen out from under them. This makes the playing field more level for individuals. Without these laws, the marketplace would be out of control and the small guy would probably be eaten alive by big business |