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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.
Taking Advantage of a Free Service to Find Great Grocery Deals Are you interested in saving money on your groceries? Are your grocery bills getting you down? With the rising cost of food staples, it is becoming more important than ever before to choose carefully and shop smart. Fortunately, if you are willing to do the research and homework, you can find many great deals that can save you hundreds on your monthly grocery bill. Here is a free service that can help you find great grocery deals. This new grocery service is known as mygrocerydeals.com. Here is a brief run-down of what this new system can do for you. What Can MyGroceryDeals.com Do For You? There are many web-based services, and while many offer fine free services, very few can help you save actual money on your grocery deals. It is a good thing that mygrocerydeals.com came along, then. What can this web-based service do for you (and your grocery food bill?). Mygrocerydeals.com is directed at those savvy food shoppers that rifle through the weekly circular ads on a regular basis, and those that spend their long Sunday mornings clipping coupons with a cup of coffee in hand. If you are tired of this dull ritual, fear not—mygrocerdeals.com is here to save you from this routine. Discovering the Scope of MyGroceryDeals.com Basically, this fine web-based service saves you the trouble of having to rifle through all that newsprint and coupon circulars. This web-based service is basically a giant database of local grocery store offers and specials. By using this easy web-based service, you can build your very own grocery list and even build shopping lists for the store that you prefer to shop at. You can also choose to browse the various deals and steals at your local grocery stores. Furthermore, you can even get information about the products you are shopping for. With this easy to use web-based service, you can even check out the nutrition database, food allergy alerts and other pertinent information. You can create your own virtual shopping list and then print it out for when you are ready to hit the store. Even better, you can download special deals and coupons for foods on your shopping list. How You Can Use MyGroceryDeals.com If you are ready to use this free web-based service, you can begin by registering a new account. You will need to enable pop-ups in order to get the full scope of the website. Most links will show up in a pop-up, so be sure that you check your Internet preferences before you begin. The website allows you to compile grocery lists and even save lists for future reference. You can try the 'try us now' link in order to browse your local store and select your closest location. You can even browse the stores in your surrounding areas. Before you submit your registration, note that there is a small check box asking you whether you would like to receive a free copy of Taste of Home Magazine. Make sure that the box is checked or unchecked accordingly. Get a Taste of the Printable Coupons One of the best things about using the mygrocerdeals.com web-based service is that you can gain easy access to a large collection of printable coupons. Make certain that your printer is ready to go before you log on. Also, be forewarned that in order to print out many of these coupons, you will need to install a browser plug-in from Coupon.com if you don't already have this driver installed on your computer. If you have already printed coupons from the World Wide Web before, chances are that you already have this plug-in installed. You can test this by attempting to print out new coupons. Why Taking that Vacation Can Lead to a Better Workplace Do you love your vacations? Are they relaxing, fun and entertaining? There are many reasons why a vacation can enrich your life and fulfill you with joy and happiness. But many of these reasons actually can also be directly translated into reasons for why taking that vacation can lead to a better workplace for you, your boss and other employees. Vacations are as essential to a hard working employee as a parachute to a person jumping from an airplane with the goal to land safely. Many employers would love to minimize the time you are gone from your workplace because they think the more time you spend there, the more work you will accomplish. This argument is right up to a certain amount of hours and days a months or a year, but whenever your body starts to get tired and exhausted, the amount of work that you produce decreases. The quality of your work starts to decline as well. Time off work, time together with your family, time to relax, time to regenerate and time to just plain have fun are very important in an employees life. Taking a vacation has many benefits to the employee, but also to the company you work for. The more relaxed and happy your worker starts a workday or the workweek; the better will most likely be his or her performances at work. Research has shown that relaxation and regeneration are essential to human bodies. Did you know that in some companies in Europe and Asia, the emphasis on relaxation goes so far that meditation, morning sport and a short power nap belong to their required parts of a work day? The United States is actually one of the only industrialized countries that does not mandate a minimum of vacation days that the worker has to take off. In fact, in many countries in Europe, a minimum of 20 and more days is the norm. Since the late 1970s, the average middle income family works in total hours three and more months a year more then they did back then and according to a research done by Boston College, approximately 25% of Americans do not take a vacation at all. After all these facts are slowly emerging from mounts of collected date, some of the bigger American companies have actually begun to realize that off-time and vacation are essential to prevent mishaps and screwed up designs and products. If you are not taking your vacation or your employers does not allow for any vacation, a series of health hazards such as stress and high stress, sleeplessness, burnout, heart attacks and even more serious health conditions can occur. Another big factor in working too much, working overtime or never having vacation can be problems and loss of family and friends. Problems with families and friends will directly impact performance at work and even though the employee might not talk about it at work or might b e holding back his or her feelings, the mood and general behavior of the employee will have an impact ion his work and other employees. Every employee should value the vacation time given to him or her and employers should grant the time asked for to their employees. Vacation is essential to the performance at work and the quality in products the company can deliver. Following the examples that are set by many European countries, the US should give their employees the time they need and also make sure that their employees do take the time off to be a better employee overall. Vacation is fun, relaxing and regenerating. |