Welcome to elreno.org
Web Hosting - Managing Disk Space
Few things are less exciting than managing the disk space that always seems to be in too short a supply. But few things are more important to the health and well being of your site.
The most obvious aspect of managing disk space is the need to have enough. If you have only a few dozen web pages, that's not an issue. But as the amount of information (web pages, database content and more) grows, the quantity of free space goes down.
That's important for two reasons.
All permanent information on a computer is stored on hard drives. Temporary information is often stored in memory only. The two components are completely separate, though they are sometimes confused with one another. As the amount of free space on the hard drive decreases several effects occur.
Here's one way to picture them...
Imagine you had a table with a certain area and you lay out playing cards on the table. At first, you lay them out in order, the 2 at the side of the 3, then 4, and so on. But then you pick up one or two cards from the middle and discard them. Then you add some more cards. Pretty soon things look pretty random.
Now cover the cards with a big opaque sheet of paper.
You want the cards to appear in order when displayed to someone. A special robot could be designed to always pick up the cards from underneath the sheet in order. Or, it could slide a hole in the sheet over the cards to display them in the correct order (2, 3, 4, ...), no matter what order they are really in. That's similar to how the operating system always shows you information in a sensible way, even though it's actually stored randomly.
Why should you care?
Real files are stored in pieces scattered around the drive wherever there is space for them. The more free space there is, the quicker the operating system can find a place to store a new piece. That means, if you delete the junk you no longer need (and free up more space) the system actually runs quicker. It helps create space you might need, and allows the operating system to store files for you faster.
But there's a second effect.
As you delete old files or change them, the pieces get more and more scattered. It takes the 'robot' longer and longer to fetch or display the 'cards' in order. Existing files are fetched and put together 'on the fly' (say, when you request a graphical page or a list of names). But, it takes longer to put together the web page when there are more scattered pieces.
So, the other aspect of managing disk space is to keep the pieces of the files more or less in order. A utility that does that is called a 'de-fragger' or de-fragmentation program. You can request that a system administrator run it, or if you have the authority, you can run it yourself. That keeps the 'cards' in order and allows for quicker access to them.
So, managing disk space involves chiefly three things: (1) keeping enough space to store what you need to store, and also (2) keeping enough free space to make new file storage quick and (3) making old file retrieval fast by keeping things orderly.
When only a few files are involved the benefit isn't worth the effort. But as the number and size of the files grow, to thousands of files or several gigabytes of data, the effect becomes more noticeable. Keeping things organized then makes a significant difference in performance.
Much of this can be automated using utilities. Some will delete files in a certain folder older than a certain date. A de-fragger can be set to run automatically during times of light usage, or quietly in the background at all times. Discuss the options with your system administrator and help him or her do the job better by keeping your house in order. You'll benefit by having a better performing web site.
Evaluating your Free Offers of Stuff Getting free stuff can be a lot of fun, and for many people, the hunt for freebies is as fun as actually enjoying the free products themselves. There is a dark side to freebie offers, however. Many scam artists have come to realize that pretending to offer free things is a great way to trick people into handing over sensitive information about them than can be used in identity theft operations or even bilk them out of cold, hard cash. For that reason, it is important to make sure you know how to stay out there when you’re looking for free offers. There are some things you can do to make sure you freebie hunting only brings you good times – these common sense rules are a great place to start. You’ve heard it a million times before – if it sounds too good to be true, it probably is. The reason you have heard it so many times is that it almost holds water. Think about the reason that companies give away free things. They’re usually not doing it for charity. They want you try to their products in the hope that you will come back to them as a paying customer in the future, and they’re doing it to build good will for their company over all. They’re definitely not doing it go broke. So consider whether the freebie offers you come across make sense according to these criteria. Does it make sense that a company will give you a free bag of their new flavor of chips or a trial size jar of their new face cream? Sure it does, because if you like it, you may buy these products in the future. Does it make sense that a company will give you an all expenses paid, two-week first class trip to Bali for you and ten of your friends? Not so much. Don’t waste your time on these too good to be true freebies – they may end up costing your big time in the long run. By the same token, the more outlandish an offer sounds, the more you have to look for the small print. Sure, maybe the hotel chain is willing to give you a free weekend in their beachfront hotel. The small print in the offer might say that you have to agree to spend 10 hours a day at a sales seminar or that the free weekend is yours after you pay for a two week stay. One particular airline ran an offer for a free coach class plane ticket from New York to London. The small print said you had to buy two, full price first class tickets on that same route before you could get the free on – at a cost of around $8,000 per ticket. Before you jump, make sure you get all of the details. Freebie offers that actually require you to shell out some money are very tricky. Sometimes they are legitimate – after all, if you are accustomed to paying full price first class airfare, a free coach class ticket can be a real score. But many times, when you have to pay to get something for free, that is a red flag that a scammer is at work. You should never send money, even for postage, to a company that you don’t know. Also, keep an eye on the costs for things like postage even if you do know the company name. If they’re asking for $50 postage to send you a free magazine, then you know something is up. Lastly, beware giving out too much personal information. There’s no reason a company giving away free shampoo needs your bank account details. Protect your private info and if you’re unsure, move on to the next freebie offer. Highlights for Free Stuff for Educators Everybody knows that teachers work hard for little monetary compensation. Fortunately, there are many fine resources available that allow educators access to free stuff. Who deserves free stuff more than our teachers? If you are a teacher searching for the best of what the web's freebies, here are some places that offer freebies just for educators. Teaching Education Aid Available for Free There are many websites on the World Wide Web that offer totally free educational and teaching aids. If you teach younger students, you can find great coloring pages. You can also find several teaching aids, including alphabetical pages. Why spend money on expensive preprinted alphabets? You can gain easy access to your own free alphabet pages. Print them out, color them and seal them to make them last. This is an easy way to put together very elemental packets and gain access to fun activity pages. There are many fine teacher resources available for free on the World Wide Web. Here are even more resources for finding great and free resources for educators of all stripes. Getting Access to Free DVDS for Educators Did you know that you could get access to free educational DVDs? Izzit.org offers you a free DVD on your birthday (or another day of your choosing). This offer is limited to teachers of grades 6-12. This website also offers educators discounts on educational DVDs as well as coupons for free ice cream. Gaining Free Nutrition Educational Materials If you are an educator seeking out free nutritional materials, you are in luck. The Dole Corporation is currently offering free educational materials to teachers. Their 5 a Day program offers free downloadable teaching materials. You can also request professional teaching materials by using mail and fax. Simply request your free nutritional materials on your school's official letterhead. Free Computer Tools for Educators If you need access to free teacher tools, Microsoft Office has got you covered. Microsoft is currently offering free learning essentials that can help you create handouts, compose tests, and make presentations and other educational content. You will need a registered copy of Microsoft Office 2002 or 2003 that runs on Windows XP and Windows 2000. Need Teaching Aids for Your Classroom? If you are looking for free teaching visual aids, there are many nonprofits that can provide you with such aids. The Human Genome Project offers educators free posters. Although this promotion is directed specifically to educators, anyone can take advantage of this great offer. The National Institute of Drug Abuse also offers free visual teaching aids. These are great to hang in the classroom. You can order multiple copies directly form the National Institute on Drug Abuse. The USEPA is another organization that offers educators a variety of free posters, as well as other teaching materials, including activity books, CD-ROMs, lesson plans and more. Keep Your Classroom Safe With Free Cleaning Aids Keeping the classroom clean is one of the biggest challenges of any educator. The Clorox Company is trying to make it easier on teachers by offering them a free "Clean Up the Classroom" multimedia kit aimed specifically at classroom educators. The free kit comes loaded with a poster, a cleaning guide and DVD. You will also get a free canister of handy Clorox Disinfecting Wipes. Get Free Magazine Subscription Offers Educators have access to many free magazine subscription offers. Yes Magazine is offering educators a free one-year subscription. This is a magazine published by the Positive Futures Network. This is non-profit organization that helps promote social change to a more compassionate and sustainable world. Take advantage by contacting the magazine for your free educator subscription. |