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Web Hosting - Sharing A Server – Things To Think About
You can often get a substantial discount off web hosting fees by sharing a server with other sites. Or, you may have multiple sites of your own on the same system. But, just as sharing a house can have benefits and drawbacks, so too with a server.
The first consideration is availability. Shared servers get re-booted more often than stand alone systems. That can happen for multiple reasons. Another site's software may produce a problem or make a change that requires a re-boot. While that's less common on Unix-based systems than on Windows, it still happens. Be prepared for more scheduled and unplanned outages when you share a server.
Load is the next, and more obvious, issue. A single pickup truck can only haul so much weight. If the truck is already half-loaded with someone else's rocks, it will not haul yours as easily.
Most websites are fairly static. A reader hits a page, then spends some time skimming it before loading another. During that time, the server has capacity to satisfy other requests without affecting you. All the shared resources - CPU, memory, disks, network and other components - can easily handle multiple users (up to a point).
But all servers have inherent capacity limitations. The component that processes software instructions (the CPU) can only do so much. Most large servers will have more than one (some as many as 16), but there are still limits to what they can do. The more requests they receive, the busier they are. At a certain point, your software request (such as accessing a website page) has to wait a bit.
Memory on a server functions in a similar way. It's a shared resource on the server and there is only so much of it. As it gets used up, the system lets one process use some, then another, in turn. But sharing that resource causes delays. The more requests there are, the longer the delays. You may experience that as waiting for a page to appear in the browser or a file to download.
Bottlenecks can appear in other places outside, but connected to, the server itself. Network components get shared among multiple users along with everything else. And, as with those others, the more requests there are (and the longer they tie them up) the longer the delays you notice.
The only way to get an objective look at whether a server and the connected network have enough capacity is to measure and test. All systems are capable of reporting how much of what is being used.
Most can compile that information into some form of statistical report. Reviewing that data allows for a rational assessment of how much capacity is being used and how much is still available. It also allows a knowledgeable person to make projections of how much more sharing is possible with what level of impact.
Request that information and, if necessary, get help in interpreting it. Then you can make a cost-benefit decision based on fact.
Proctor and Gamble Great at the Freebie Thing Do you have a favorite manufacturer that you like to tap into for free product samples and coupons? For those in the know, the Proctor and Gamble Corporation is one of the best companies for getting your share of freebies. This popular manufacturer is well known as the creator of many fine household products. For freebie hunters, the Proctor and Gamble Corporation are known as one of the most reliable sources for awesome freebie deals and promotions. Here are some hints and tips at become at an ace at getting freebies from your favorite manufacturer. Get to Know the Proctor and Gamble Corporation for the Best Shot at Great Freebies If you want the best shot at getting the best freebies from Proctor and Gamble, you will find that they are very generous with their free samples and coupon freebies. But you will have to take the time to know the company. Peruse their website and get to know their promotion schedule. The Proctor and Gamble Corporation is a favorite with many freebie hunters because it provides consumers with a wide range of products and they even maintain a special webpage dedicated exclusively to their current promotions and offers. Once you have located this page on their official website, go ahead and bookmark it for future reference. Check with the site periodically to see what offers and promotions are currently on the table. Enable Flash to Get the Most Out of the Proctor and Gamble Page Recently, the Proctor and Gamble Corporation, along with many other streamlined websites, has added a Flash based scrolling design to display their current offers and promotions. In order to view these promotions, you will have to make sure that you have Flash enabled on your web browser. These scrolling offers are shown at the bottom of the page. Check these often and carefully as new offers are added periodically. Read the scrolling items carefully. Some of them will link you to official sweepstakes offers, while others will lead you straight to freebie offers and coupons. Selecting the Proctor and Gamble Offers that Most Interest You In order to get the best deals, visit the promotions page on the official Proctor and Gamble website. From there, you can select all the free offers that most interest you. The Proctor and Gamble webpage usually comes loaded with a healthy selection of free samples, sweepstakes and coupon offers. Another thing you can do to make sure that you always have access to great Proctor and Gamble promotions is to get on their mailing list. Make sure you select the products you are most interested in so that you will get pertinent mailers and coupons. Read the Fine Print on Proctor and Gamble Offers and Promotions When it comes to manufacturer promotions, time is of the essence. Most great deals and offers will not last forever. Make a note of the expiration date of the deals you are interested in. Read the fine print on the promotions. Most will only be available to United States residents. However, international customers do not have to despair. Simply look for the global link on the main page. This will connect you to other pages that offer you pertinent promotions for your country of residence. For the most part, Proctor and Gamble has established itself as a worthy generator of freebies, coupons and sweepstakes offers. Chances are that you will find your freebies in the mail within a few short weeks of making your initial request. Are There Any Risks Associated with Getting Proctor and Gamble Promotions? Some people are wary about handing over their personal contact information to a company. If this is a concern with you, make sure that you read the company's own privacy policy. As a general rule, you should avoid making requests and giving personal information to companies that do not offer you easy access to their privacy policy. Web Hosting - Domain Name Changes and How They Affect You New domain names are registered all the time, and ones previously registered expired. Sometimes that's the result of simple neglect. The owner of the name chose not to renew his or her ownership, so the name became available for someone else to use. In rare cases, a highly original mind managed to think of a new one. In the other common scenarios, someone chose to just let it go or sell it. When you choose to change your domain name, there are actually two separate steps involved: releasing the old name, and adopting the new one. But, just as the postal system can have difficulty forwarding your letters when you change your personal name, changing your domain name brings certain difficulties. One of the most prominent is the fact that any name change requires a change to thousands of DNS Servers around the globe. DNS (Domain Name System) is the set of software/hardware components that allows domain names to map to IP addresses. IP addresses are what are actually used 'under the covers' when one computer communicates with another. Note that there isn't always a 1:1 correspondence between a name and an IP address. One IP address can serve multiple domain names and one domain name can have multiple IP addresses. For the sake of simplicity, we'll stick to the common case here. DNS servers around the world maintain internal databases that match the name to an IP address. Not all servers have all pairs of names/addresses. A series of complex routines allows a request to be forwarded when the particular DNS server doesn't have a needed record. When you acquire a domain name that used to be associated with a given IP address, the odds of you acquiring the same IP address are extremely low. In the unlikely case, for example, that you acquired the domain name yahoo.com, you would almost certainly not get the IP address that was matched with it (unless you bought the Yahoo! company). So, as a result of the change, the name/IP address pair is no longer what it was. A similar circumstance exists when you retain your IP address, but want to change the domain name associated with it. In either case, the pairing has changed. The catch is this: when the change takes place, those DNS databases are not all updated instantaneously around the world. Even apart from the limited speed with which computers and networks operate, (and neglecting the human factor if/when the change is made manually to more than one server) the reason is something called caching. In order to communicate efficiently, DNS servers are designed to assume that changes will be relatively rare. Just as with the postal system, you don't move your address or change your name every minute. Since that's true, in general, the name/IP address pair is cached. A cache is a set of stored information that is reused so that fresh information doesn't have to be communicated with every request for a web page or data. A chain of DNS servers pass requests to the last known address. There is usually more than one system between your computer and the server you want to communicate with. Most of the time, that's your current name/address. When you change the name, that pair is no longer valid. In order to propagate the new name/address pair (so the terminology goes), that cache has to be refreshed. Something similar happens when you establish an entirely new name. That name is first associated with an IP address and that pair has to be communicated to DNS servers around the world in order for you to be able to reach any one of them at random. But DNS servers don't do that until they are requested to do so by your action of asking for information from a remote server. Because of that, but chiefly because of caching, it can take quite a while for the new pair to become known around the Internet. Caches can expire and get refreshed in a few minutes or a few hours. It varies. That time can be as short as an hour or less, if the path between your computer and the web server is very simple and only one DNS server needs to be updated. Or, it can take up to 48 hours or more. Though the 'official' range is often given by registrars as 24-48 hours, the average is closer to about six hours. But that's an average. The actual time in any given case can (and does) vary widely. In the meantime, a number of effects can occur. The most obvious is that, since the name/IP address pair can't be resolved properly, you don't reach the server you want. Your browser points to the old one (in the rare case it's still accessible by that name and address), or it simply reports there's no such name at that address. So, when registering a new name or buying an old one, you should establish the site, but not advertise it for at least a couple of days. Better to wait to get visitors than to turn them off by being 'not at home' when they call. |