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Disk Fragmentation and Computer Performance...
Depending on when you arrived on the computing scene, and also
depending on your level of technical involvement in computing,
you may or may not have heard of file fragmentation and its
effect on computer performance.
For those that don't know what it is, a quick primer: Over
time, files saved on a hard drive become split into parts, or
fragments . In later Windows operating systems, this
can get fairly drastic – a single file can be split into
hundreds, thousands, or even tens of thousands of fragments.
This condition can cause file access to slow dramatically, and
of course overall performance will slow down accordingly.
If you go back fifteen years or so, file fragmentation was a
serious problem for all computers, mainly due to the smaller
sizes of hard drives and the fact of trying to store as much
data on them as possible. They tended to fill up fast, and file
fragmentation would slow them to a crawl. Hence, defragmenting
became an importance for many of the top operating systems,
including DOS and Windows.
When hard drives began to get gigantic, fragmentation became
less of a problem on machines that weren't constantly accessing
their local drives. For example, a user in a corporate network
environment who stored most of their working files on a server
would not greatly benefit from defragmentation of their local
hard drive. And many home users, when drive sizes regularly
exceeded 1 gig, would see little to no benefit from it, either,
unless they ran applications which created and/or deleted files
quite a lot, or for some reason had overly-full hard drives.
For a home user, or for anyone who wishes to see if
fragmentation is a problem on a single machine, it's simple
enough to find out: Run the defragmenter and see if there's a
performance difference. Since Windows 2000, Microsoft has
included a disk defragmenter as part of the operating system,
and it can be found in Windows XP by accessing Programs, then
Accessories, then System Tools (for earlier Windows versions,
such as 9x and NT, you have to obtain a third-party
defragmenter. The same is true for Linux and Macintosh). It's
best to run the defragmenter when you're not using the computer.
Although you can use your computer while running the
defragmenter, it does slow down performance considerably. Easier
just to go do something else while it's running.
In Windows XP, you can also schedule defragmentation to run
when by adding it to Scheduled Tasks. You do this by going to
Control Panel, then Scheduled Tasks, and using the wizard to
schedule the task. When the wizard prompts you for the task to
be scheduled, click “browse”, and go to WINDOWS/system32/defrag.exe.
You can then set the defragmenter to run daily, weekly, monthly,
when you log on, one time only, or when the computer starts up.
If you wish a more precise schedule, you'll need a third-party
tool or script.
When you move into a corporate environment, fragmentation's
effects present more of a problem, especially on servers which
are constantly accessed. File servers especially benefit from
regular defragmentation, and it should be scheduled to run when
users are not accessing the system. This is normally scheduled
and done off-hours. Depending on your server operating system,
the defrag utility included in Windows may not be able to be
readily scheduled. You can script a schedule – you can do an
online search, and many people have posted scripts to use to
schedule defragmentation. You may also wish to purchase a
third-party defragmenter for this purpose – there are several
available which can be easily scheduled and run. Most of these
defragmenters are also available in home versions.
NOTE: If you're trying to improve the performance on a
database server, you may find that defragmentation doesn't cut
it. This is because the operating system sees the database as
one large file instead of many records included in the database.
The condition of database record fragmentation is known as
internal fragmentation, and some database vendors provide a
defragmenter for this purpose. If you want to defragment your
database server disk, make sure you try one of the free methods
above, or a trial version of a defragmenter before you spend
money and find out you get little to no performance gain.
And for Linux and Macintosh: You can search the internet and
find free defragmenters for Linux. You can also search for Mac,
but Mac defragmenters aren't free, at least as I was able to
find. As someone who has used a Mac in the past, I can say they
definitely benefit from regular defragmentation.
Automating Scheduled Tasks
As mentioned above, there are a number of ways you can
schedule defragmentation of remote machines on a network.
Interestingly, automating such tasks is included as one of many
remote desktop management features in RemoteScope, Micro2000's
powerful remote desktop management product.
In addition to saving time running around to defragment
remote computers, it also saves having to travel to monitor
users, install updates and patches or update or install new
software. In addition, it keeps track of all your installed
hardware and software and what you have installed on which
machines.
There are numerous products on the market to assist you in
performing these functions, but very few perform them all –
simply, affordably, and from one location.
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