Welcome to gxprelectrical.com
|
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.
Free Baby Stuff Requires a Visit to Babies Online Babies online is the page on the Internet when it comes to free stuff for the baby and new parent. The page offers any parent resources about the growing baby. Anything from personalized weekly calendars, over calculators to articles and information can be found on this web page. All the information offered on the page is freely available to anybody who signs up for their free membership. Under the top pages offered by babies online are pages that contain links to other free baby web sites, fun birthday facts, a weekly pregnancy calendar, due date calculator, baby’s first year, baby photo contest, baby names and meanings, baby freebies and a baby’s online blog. These pages are visited by the most users and are also most frequently used by members of the page. All these pages offer information around pregnancy and the infancy. Some of the pages offer advice on many of the questions that parents have in their first year of parent hood or before during pregnancy. The baby pages section of the website offers anybody to have an online birth announcement for the newborn, to read other peoples birth announcement and even to create or read other women’s pregnancy journals. Anyone can create his or her own and then sent links to all their friends to show off their little one over cyberspace. Not only does this save the writing and buying of all those birth announcement cards, it also saves the stamps and printed pictures that generally are included in birth announcements. The freebies page offers users links to free baby websites, links to free baby product samples, free pregnancy wristbands, free photo prints, free baby coupons and even freebie alerts. The free baby’s web site section lets parents create a web page that is completely centered on their new addition and give the new parents a chance to share their precious with all their friends and family. In the free baby product sample section a parent can find anything from free magazine subscriptions to those famous parenting magazines, to formula samples and children’s books. Due to the ten year anniversary of the page the web site offers pregnant mothers a free pregnancy bracelet. It is not only sleek and fancy, but is also there to alert any doctors or other personnel of the mother’s pregnancy status in any kind of situation, such as fainting, unconsciousness or an accident. A link to a related photo-processing place offers free photos for parents. Shipping as well as the prints is free to anyone that signs up to receive this offer. The online photo page offers any of the services a local photo store or photo lab might offer. Cards, picture prints, enlargements, photo gifts, calendars and more can be bought from this online site additionally to the free prints. On the online babies coupons and sample page users can find links to good deals, links to coupons and links to free samples. This part of the page is sure worth checking out. Some of the deals are for baby gear and baby food, while others also have links to places that offer deals on toddler’s and younger children’s clothing items. Even if it is just the beginning of pregnancy, checking out what is available online; especially on babies online can have great advantages. Some of the links offer new parents and parents to be many samples of different formulas, if this is going to be the choices to feed the baby, parents have a chance to try the different formulas and additionally get coupons for their favorite one. Not just the coupons, but also the free tools and journals on the web page make it worth to check it out. So go ahead and surf the web page to get up to date with newest baby information. Tackling those Second and Third Interviews to Land that Job If you make it to a second or third interview, you are a serious candidate for the job. The key now is to narrow down the candidates. This moment is when you will determine if you get called with a job offer or receive a notice of rejection in the mail. Arm yourself with the proper tools and make an even bigger splash on the second and third interviews than you did at the first one. The first thing to remember when you are going into a second or third interview is what you said in the first interview. The interviewer will have notes from the first interview so you need to be ready to follow up on things you said initially. This is why it is important to be honest and realistic in the first interview. If you work hard to impress the interviewer and end up lying, you may not be able to recall they lies you told in the first interview. Eliminate this from being the case by telling the truth the first time around. Be armed with questions about the position and the company in generally. Search through information online about the company and get a feel for day-to-day operations. Type in the name of the company in Wikipedia and see what comes up. Many corporations are listed in this massive Internet encyclopedia and information about the company can be found there. Find out as much as you can about the company you are interviewing with. If you are interviewing with the same person the second or third time around, ask about their experience with the company. Questions like, “What is a typical day for you on the job?” or “How long have you been employed with the company?” can help to build a relationship with the interviewer. It also signals that you are comfortable with the interviewer. Not to mention, who does not like to talk about themselves? This is a great way to keep the interview moving on a positive note. Have plenty of questions about the position. Show that you have researched the job and are very confident that you are going to get it. The more inquiries you have about the position the more serious and interested you will seem. By the second or third interview, you will probably meet a number of different people. Shake hands firmly and look them in the eye when talking to them. If you are given a tour of the facilities, ask questions. Do not just let your tour guide point out areas without you taking an interest in them. Although it may seem like second and third interviews should be easier, do not let your guard down. Stay on your toes and be even more prepared than you were for the first interview. As the interview process moves on you will probably be meeting with the person that will be your direct boss or the director. Interviews with these figures may be much more difficult than the first interview which was probably with a human resource person. Be aware of this fact and have answers for those tough questions like, “What makes you the right candidate for this job?” Also be prepared for hypothetic situations that may take some spur of the moment problem solving. No matter what number interview you are on, there are some standard rules to follow. Take copies of your resume to your second and third interviews. Even though the interviewer may have a copy of your resume, you want to be armed with extras just in case there are other people in the department that would like copies. If you meet with different managers they may all ask for copies of your resume. Yes, they have copies, but they want to see if you are prepared. |