What is a looking glass site?
There are really two possible answers to this question... If you are in the United States Air Force, this refers to a specific military Web site. If you are uncertain about what URL you need to use to find it, ask your CQ to point you to the resident computer geek for directions, which they should be able to give you off the top of their head.
The more general answer is derived from the name. The phrase "looking glass" is British usage for what Americans call a mirror. From that, I assume that a "looking glass site" is what the Internet commonly calls a "mirror site".
Internet Web sites with high traffic frequently designate additional sites as "mirrors" of their content. This means that the original site such as http://www.cpan.org will designate additional sites such as http://ftp.sun.ac.za/CPAN/, http://CPAN.pacific.net.hk/, http://mirror.uklinux.net/CPAN/, ftp://ftp.matrix.com.br/pub/perl/, and others as official mirrors. The original site provides complete copies of its files to its designated "mirrors" on some regular schedule, usually nightly.
This has a couple of advantages for users everywhere. It guarantees that there is an off-site backup of the data from the mirrored site, because each of the mirrors should have a complete copy of the original site, no more than a few days old. It reduces the load on the Internet itself, since people will normally choose to download from a mirror site with good performance, which normally means that the site is relatively nearby. It also reduces the load on the original site, since it should move more end-user bandwidth to the mirror sites than the bandwidth needed to keep the mirror site(s) up to date.
For More Information
- What do you think about this answer? E-mail us at editor@searchDatabase.com with your feedback.
- The Best Database Design Web Links: tips, tutorials, scripts, and more.
- Have a Database Design tip to offer your fellow DBA's and developers? The best tips submitted will receive a cool prize--submit your tip today!
- Ask your technical Database Design questions--or help out your peers by answering them--in our live discussion forums.
- Ask the Experts yourself: Our Database Design guru is waiting to answer your toughest questions.
Dig Deeper on Oracle database design and architecture
Related Q&A from Pat Phelan
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.