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Web Hosting - How To Select A Web Host As with many purchases, our first impulse when selecting a web hosting company is to go with the cheapest. Hey, they're all alike, why pay more? Au contraire. There are a number of objective criteria that separates one web hosting company from another and money is only one of them. And not the most important one. Selecting a company based on price alone is equivalent to selecting an auto mechanic on price alone. Sure, he may maintain or fix your car cheaper. But will the car spend all the time in the shop and none on the road? The first consideration is 'horsepower'. Do they have the capacity to carry your load and deliver decent performance? Most hosting companies will advertise that they have huge bandwidth and hundreds of servers. They're usually telling the truth. But there's a difference between existing capacity and usable capacity. If they also have thousands of sites with millions of visitors per day the available or free capacity will be much lower. A big pickup truck may be able to tow 5,000 lbs. But not if it's already carrying 4,999. Be sure to ask about available capacity, and have the prospective company back it up with reliable numbers. If you can't interpret the information they provide, find someone to help you do so. Next, and a very close second, is reliability. A lot of power is worthless if it's cut often. Outages are a normal part of business. Even Google and Microsoft go down from time to time. The difference is, it happens rarely and they have failover plans. That means, if their site/system does go down it's either up again in a flash, or you never see the outage because a backup system kicks in automatically and seamlessly. Be sure to grill the company closely about their up time. They'll often tout 99.6%, or some such figure. But, like the on-time figures of the airlines, those numbers can be shaded by adjusting the definition of 'up time'. What matters to you is whether your visitors will be able to reach your site at any time of the day or night they might want to. Find out what systems, both technical and human, they have in place to deal with failures of all sorts. Servers can go down, networks can fail, hard disks can become defective and lose data even when the other components continue to work fine. The result is YOUR site is unavailable, which is all that matters to you. The web hosting company should be able to deal with all of that and have you up again very quickly. Last, but not least, is security. With the continuing prevalence of viruses and spam, you need to know that the web hosting company you select has an array of methods for dealing with them. That means a good technical plan and staff who are knowledgeable in dealing with those issues. The old saying: 'an ounce of prevention is worth a pound of cure' is more true here than anywhere else. All these issues are central to finding a web hosting company that can deliver the services you need. After those criteria are satisfied by a number of candidates, then you can start narrowing them down by price.

Web Hosting - Changing Web Hosts, Pitfalls and Planning At some point, nearly everyone finds it necessary to change web hosts. It may be just a migration to another server, or it may be changing web hosting companies entirely. Either way, the process is fraught with potential dangers. But there are ways to minimize the odds of problems and maximize your changes of a smooth migration. Plan, plan, plan. Make a very detailed list of everything that is on your current system. Review what is static and what changes frequently. Note any tailoring done to software and files. Be prepared to remake them if the systems aren't transferred properly or can't be restored. Keep careful track of all old and new names, IP addresses and other information needed to make the migration. Backup and Test Backup everything on your system yourself, whenever possible. Web hosting companies typically offer that as a service, but the staff and/or software are often less than par. Often backups appear to go well, but they're rarely tested by restoring to a spare server. When the time comes that they're needed, they sometimes don't work. Do a dry run, if you can. Restore the system to its new location and make any needed changes. If you have the host name and or IP address buried in files, make sure it gets changed. This is often true of databases. SQL Server on Windows, for example, picks up the host name during installation. Moving a single database, or even multiple ones, to a new server is straightforward using in-built utilities or commercial backup/restore software. But moving certain system-related information may require changing the host name stored inside the master database. Similar considerations apply to web servers and other components. Accept Some Downtime Be prepared for some downtime. Very few systems can be picked up, moved to another place, then brought online with zero downtime. Doing so is possible, in fact it's common. But in such scenarios high-powered professionals use state-of-the-art tools to make the transition seamless. Most staff at web hosting companies don't have the skills or the resources to pull it off. Prepare for Name Changes One aspect of moving to a new host can bedevil the most skilled professionals: changing domain names and or domain name/IP address combinations. When you type a URL into your browser, or click on one, that name is used because it's easier for people to remember. www.yahoo.com is a lot easier to remember than 209.131.36.158. Yet the name and or name/IP address combination can (and does) change. Still, specialized servers called DNS (Domain Name System) servers have to keep track of them. And there are a lot of them. There may be only two (rarely) or there may be a dozen or more DNS servers between your visitors' browsers/computers and your web host. Every system along the chain has to keep track of who is who. When a name/IP address changes, that pair has to be communicated to everyone along the chain, and that takes time. In the meantime, it's possible for one visitor to find you at the new place, while another will be pointing to the old one. Some amount of downtime will usually occur while everything gets back in sync. The Little Gotchas But even apart from name and IP address changes, there are a hundred little things that can, and often do, go wrong. That's not a disaster. It's just the normal hurdles that arise when changing something as complicated as a web site and the associated systems that underlie it. Gather Tools and Support Having an FTP program that you're familiar with will help facilitate the change. That will allow you to quickly move files from one place to the next to do your part to get the system ready to go or make repairs. Making the effort to get to know, and become friendly with, support staff at the new site can be a huge benefit. They may be more willing to address your problem before the dozen others they have to deal with at any given moment. Ok. On your mark. Get ready. Go.

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.