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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.
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. Networking Ideas to Land a Job You Want Finding a new job is always a chore, especially if you are looking for your ideal job. While all jobs have pros and cons, finding employment that you enjoy or feel strongly about can greatly improve your job satisfaction. There are many ways to network and find the job you want. One of the biggest ways to make connections is to volunteer or find an internship. If you have not been able to land a permanent position in the career of your choice, apply for internships or offer your services for free. This is an ideal way to get your foot in the door and since the employer will already be familiar with you, it increases your chances of being hired when an opening arises. Meet people in the field you want to be in. If there are conferences or organizations that members who work in your desired field join, see about getting a membership or attending. Networking within your field of choice can build connections that blossom in the future. Take a lesser position at the company you want to work at. If you want to be a manager but are offered a customer service position, take the customer service position. Management roles are less stressful when you know what the company expects from you. Watch and learn the ins and outs of being a manager at that particular company. After you have some experience under your belt, apply for the next opening. Ask around. Most job openings are not posted anywhere. Finding openings is typically more about inquiring than finding posting. If you are eager to be a part of a company, e-mail your resume to the Human Resources department and see what type of hits you get. Stop by local companies and inquire in person and leave a copy of your resume if there are openings. Most employers are using the Internet to find new employees. Even if the position they are hiring for is not posted online, searching through posted portfolios is commonplace. The best way to get noticed is to have a concise portfolio that goes into detail about past work experience and your future career goals. Before you make it to an interview, the employer should already have a good idea about whom you are. Having a web presence is essential to job-hunting these days. Many employers are using e-mail and electronic submissions to screen employees. With that in mind, you need to be Internet savvy. Brush up on Internet skills, learning the tricks and trades of using the web as a way to seek out the best jobs. Purchase a domain and post your portfolio there. Be sure to show versatility, accomplishment and organization in your portfolio. Also if you choose to use social or networking sites represent yourself in a positive light. Be sure to keep your portfolio updated even when you are not actively looking for work. An interested employer could choose to contact you based on your updated portfolio. Be open to relocating. Search through Internet job postings for other states. Leaving your hometown might be difficult but the job of your dreams may be out there somewhere. Pack up and move to a more economically viable area and mingle with the populous. Make your employment intentions known without seeming desperate for a job. No matter what type of job you have been dreaming of, there are numerous ways to get that position. The key to pinning down, and getting the job you desire is to never give up. If you have been on the job hunt for two years without any success, do not give up. |