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Web Hosting - Databases, What Are They and Do You Need One? 'Database' is one of the most commonly used terms that one encounters in web site design. Yet, what they really are and whether they're essential is often not clear to novices. A database is a collection of organized data, stored in files that have a specific structure. It's that organization and structure that allows for easy and rapid storage and retrieval. The need for a database generally only arises when you have a certain amount of information and that information needs to have some structure. If you have a half-dozen names and addresses to store, a database is usually overkill. If you have a blob of data with no relationships between any of the items in that blob, maintaining a database is usually more trouble than it's worth. Maintain a database? Yes, like other complex systems a database, to be effective, needs to be designed properly at the outset then kept 'tuned' for good performance. The alternative is to gradually allow the database to become more and more disorganized. That leads to difficulty in use, poor speed of retrieval and more frequent failures. With MySQL, Access or MS SQL Server, the three most common choices of database product for web sites today, setting up a database is relatively simple. Even those with limited technical skill can get one up and running just by following some simple instructions. But some thought should be given to how you want the information organized, and to maintaining the system during its lifetime. Suppose you have a set of names, addresses, email addresses, products purchased, date purchased and amount. If you have only a few dozen records it matters very little how these pieces are arranged and related. A database usually isn't even warranted in this scenario. Once you have several thousand or more records, it matters a lot. Speed, the ease of expanding the set of attributes (like adding, say, product category), and other issues come into play. Even those with little technical expertise, but a willingness to exert logical thought and invest some time, can build a very robust database. Think about how you would organize a set of data (called 'tables'). Should Name, Address, and Product be in the same table? Or should the personal information be stored in one table and any product information (product, price, ...) in another? Some experimentation may be needed to get it right, but the choices have an impact on how easy the tables are to maintain. It also affects the speed with which programs can fetch old data and store the new. Having a database also introduces new maintenance issues for the server administrator, since backups usually need to be done differently. Recovering a failed database is usually more complicated than simply re-copying files from yesterday. Ask your hosting company what tools and skills they have for dealing with any database system you consider. It's true that introducing a database creates more complexity and the need for additional thought and administrative effort. At a certain level, professional expertise will be needed. But clearly the advantages outweigh the costs in many cases. Companies large and small eventually use databases to store and organize data. At some point, you may be fortunate enough to be one of them.

Helpful Hints for Finding Free Stuff Online The World Wide Web is awash in wonderful freebies. The problem is finding them, and sorting out the real freebies from those that will cost you in the long run. Fortunately for those of us that resist the notion of not finding cool freebies, there are many tips that can help you filter out the bad results as quickly as possible. Why is it So Hard to Find True Freebies on the World Wide Web? Why is it so hard to find true freebies on the Web, and what can you do to improve your search results? Finding freebies is harder than ever. First, try searching for freebies by typing in the word 'free' into any search engine, and chances are that you will receive a lot of filler pages that do not contain any useful information, much less any true freebies. Many websites use the word 'free' in order to draw in the web traffic, but will not actually offer you any freebies. Another problem with web freebies is that they are often not as free as you would like. In many cases, you will not be allowed to access your freebies of choice until you to watch advertisements or put up with obtrusive pop-up and banner ads. Sometimes you may also be forced to subscribe to an email newsletter that results in your inbox becoming flooded with unwanted messages. Here are some tips that can help you find the real freebies. Check Out Forums Known for Their Freebies There are many well-established online forums where you can find the latest freebies. One of these websites is SlickDeals, which has established itself as a place to find authentic freebies. Check out the freebie forum to find free samples from a wide range of products and services. You will be amazed by how many free things you can find by checking these forums regularly. Share and exchange your own favorite freebies with other forum contributors and users. Check Out the Hot Deals and Coupons to Be Found Online Another favorite site for web freebie-hunters is Hot Coupon World. This site is home to a very active forum that provides users with freebie offers in a variety of different areas and topics. Check out the many different folders to find hot coupons and freebie offers. Share and read the member secrets on how to get the best free stuff. There is even a fun Adopt a Newbie program that allows you to do just that?bring more freebie hunters into the fold. The more freebie hunters, the more chances of someone finding something worth holding on to. Does Your Free Cup Runneth Over? If you want to discover the best in online freebies, A Full Cup is not a bad place to start looking. This is yet another very popular freebie website that provides its members with the greatest in freebie deals and offers. This is a great place to peruse for the latest and the greatest in new freebie offers. The Message Board Hot Spot for Web Freebies Another freebie hot spot on the web is known as Teri's Message Board. This well-regarded web forum is family-oriented. If it is your first visit to this vibrant website, check out the Hot Deals, Rebates and Samples folders. Chances are, you will find more than one great freebie deal on this very active website. A Great Place to Gather for Long-Standing Freebies Looking for a well-established freebie website that offers the best in freebies in a well-organized manner? If so, check out the FreeSite.com. This website have been around for many years and it shows: it is well organized, with a large selection of web freebies.

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.