Varnish 1.0.2 review

Varnish is a high-performance HTTP accelerator designed for sites with large amounts of non-personalized dynamic content, such as onl

License: BSD License File size: 0K Developer: Dag-Erling Sm?rgrav

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Varnish is a high-performance HTTP accelerator designed for sites with large amounts of non-personalized dynamic content, such as online newspapers.

Here are some key features of "Varnish":
Pure HTTP accelerator
Varnish will deliver cached documents received from your backend(s), and do this fast

Very fast
Varnish is buildt for speed, and should out-perform any other Open Source HTTP accelerator.

Multiprocessor/core support
Buildt with the future in mind, Varnish supports modern hardware technology.

64-bit computing support
While it can run on a 32-bit platform, Varnish was buildt with 64-bit computing in mind.

Modern operatingsystem technology
To be able to deliver content as efficient as possible Varnish takes in use the latest operatingsystem features like Kqueue/Epoll and Sendfile. Varnish is also IPv6 compatible.

Powerful configuration possibilities
Varnish has a powerful configurationlanguage (VCL) which gives you endless possibilities and power over your content.

Runtime configuration deployment
Changing of configurationfiles are done in runtime, no need to stop/ restart your service(s).

Protection of backend(s)
Varnish is easily configured to not just stand around and see your backend(s) die if you are getting flooded with unwanted traffic. Give crawlers the content you feel they deserve. If your backend(s) should experience planned or unplanned downtime configure Varnish to never expire or fetch new content.

Ease of managment
Your Varnish server(s) can be centrally controlled from a managment program for quick deployment of changes to your system. Different interfaces are available for those that don't like the commandline.

Central and flexible logging
Logs are written to shared-memory, so logging is cheap. A centrally controlled logger program connects to the servers and collects these data so you can easily customize what, and how, you wanna logg to either display or file. This is done securely.

Realtime statistics
As with logging, we provide you with a centrally controlled statistics collector to aggregate numbers from each server or present them individially. Again this is done in a securely manner.

Instant wildcard purging of documents
Varnish will instantly stop delivery of any cached documents matching any regualar expression you give it, without wasting time traversing any structure or cached document.

Plugable storage backend(s)
We give you memory, file or tar-file (Read-Only) backend out of the box, if you wanna store/read from another backend we leave you with an API.