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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.
Web Hosting - FTP and Other File Transfer Tools Anything related to the Internet or computers is bound to introduce technical issues pretty soon. One of the earliest that novice web site owners encounter is FTP, which is an acronym for File Transfer Protocol. Seeing it spelled out, it's easy to see why those in the know quickly move to speaking in short hand. The reason web site owners soon will (or need to) become familiar with FTP is obvious to anyone who has built a site on a remote server. You have to have some way of getting the files to the remote computer and FTP is one of the most common tools. It's also one of the simplest and most efficient. FTP is composed of two parts: the client software and the server software. It's similar, in a way, to talking to someone on the phone who writes down everything you say. You (the client) make a request ('transfer this file to the server') and the listener (the server) takes the request and acts on it. That request to copy a file from a local computer to the remote one is carried out (often 'under the covers') by a PUT command, as in PUT this there. You create the web page (in the form of a file) and then PUT the file on the server. To move a file in the opposite direction, from the remote server to your local computer, your client software issues a GET command. Many FTP clients have graphical interfaces, similar to Windows Explorer, that allow you to drag-and-drop or otherwise copy the file without ever seeing the actual commands that carry it out. But it's helpful sometimes to know what goes on underneath. In tricky cases it can be an advantage to use a command line interface (in Windows, the 'DOS box', with a similar interface familiar to most Linux users). Knowing the commands and being able to use them in the command line form can sometimes help you diagnose what is going on when the graphical tools misbehave. But FTP is not the only way to get a file from here to there. In fact, your browser moves files around from a remote computer to your local one all the time. In most cases, when you type in or click on a URL, what happens under the covers is in essence a file transfer process. The web page is transferred from the web server to your local computer then displayed by the browser. Alternatively, you can sometimes even email a web page/file from your local computer to the remote server, then use an email client on the server itself to get the file and put it in a folder. That requires that you have some form of access to the remote computer. But there are many ways of doing that, such as in-built utilities in the operating system or using commercial remote control programs. Those alternatives can be helpful to know in cases where the FTP file transfer process is misbehaving. Having more than one way to accomplish the task helps you diagnose what might be going wrong. It also helps you get the job done when the usual tools aren't cooperating. The more you learn about these sometimes puzzling acronyms, the easier you can accomplish your own goals. Pertinent Advice for Negotiating Salary Your salary is a huge factor when it comes to job satisfaction and overall quality of life. That is why negotiating salary is something that you should never overlook. While many employers like to state that starting salary as if it were etched in stone, there is usually some leeway in how much you will make. Remember, what you make is going to affect your entire life. Negotiating your salary is something that you should take very seriously. There are a few things to consider before you start throwing out figures. You don’t want to lose the job you have just gotten. First of all, leave the salary negotiating for the end of the hiring process. This is important because if you agree to a lower salary earlier on in the hiring process, you will be locked into that salary. Also, as the hiring process goes on and you become more of an employee, opposed to an interview, your worth increases. If you have gone through several interviews and met a few different managers, you have been able to make an impression on a number of people. That means that several different people have measured your worth to the company. When salary negotiating comes around, you can ask for more money. With several different people discussing your salary there is a chance that your state price may win out. Before you begin negotiating salary, you should know how much you are worth. One of the most important aspects of job hunting is finding out how much your skills and talents are worth in the job market. Armed with this knowledge, you will be able to market yourself better and know whether or not the employer is bluffing you. If you know that the salary they are offering you is much less than other companies offering the same position are offering, start the negotiating. Employers are always looking for a bargain. They never shoot out the high end of salary numbers. Employers start out at the bottom of the salary barrel. That means you can work to boost the salary offer. Of course, you do not want to sabotage yourself by acting too cocky but do not crumble under pressure. Be savvy in your negotiating and recognize that if the company is hiring, they need you. Yes, you may need a job, but the need is mutual. They would not be going through the interview process if there were no need of your services. Also, they obviously were impressed with your credentials. Be sure that they appreciate you will a decent salary. Know when to start salary negotiation. When the employer is explaining the job description to you, if they state a salary that is lower than you would like, let that pass. Until you have been offered the position, you do not need to worry about the salary. The first thing is to get the job. Once the offer is made and you are filling out paper work, you can start the negotiating part of the deal. It is important to know when salary negotiating is not an option. There are certain jobs that offer a set salary for certain position. If you are interviewing for a job that has a stated, set salary, you do not want to negotiate. The stated salary is the one that you will be getting if you take the job. In these cases, whether or not you are willing to settle for less is the question at hand. If the salary is too low for you to handle, get out there and find an employer that appreciates your talents. |