3Com SuperStack 3 WEBCACHE 1000, User Manual

Page: 197 / 362

Preloading a Site 197
Adding/Editing
Scheduled Tasks
To define a preload task:
1 Log in to the Web interface.
2 Click Caching on the toolbar.
3 Select Content Preload > Preload Tasks > Preload Tasks to see the Edit
Preload Tasks window.
4 To add a new Preload Task , click Add . To edit an existing Preload Task ,
highlight the task in the list and click Edit .
5 If you are adding a new Preload Task , choose a name for the task. The
name must be unique and should be descriptive of the task you are
adding.
If you are editing a Preload Task, the name of the task will be greyed out
as you cannot rename tasks once created.
6 Enter or amend the Starting URL for the task. This is often the base URL
for a site e.g.
http://www.3com.com
but can be any URL that you can
enter from a Web browser.
7 Select Recursion Level from the drop-down box. The Recursion Level
determines how deep the Webcache is to scan when looking for pages to
preload. Selecting
None will preload only the Starting URL and the images
contained on the page. Selecting 1 will preload not only the Starting URL
and its images but each page linked from it. You may recurse up to five
pages deep.
8 Select Content Lifetime from the drop-down box. The Content Lifetime
determines how long the Webcache will assume the preloaded content is
current and therefore a cache hit, before reverting back to using its
standard checks that may involve revalidation of the content with the
Web server.
9 Check the Follow Links to Different Hosts box to allow the preload task to
follow links to other web sites. The Web pages you frequently preload
will contain links to other web sites in a different domain. For example,
http://www.amazon.com
may contain a direct link to
http://www.toysrus.com
. You can control whether the preload task
follows such links when recursing, or whether the task will remain only
within the initial web site. Normally, you will want to follow links to other
web sites. To prevent this content being preloaded ensure that the box is
cleared.
dua1611-5aaa04.book Page 197 Friday, November 29, 2002 8:56 PM