GO IT WORLD | IT TECH | IT NEWS » Cache Server

Squid Status Code Explain

jason — Tue, 01 Dec 2009 05:53:54 +0000

TCP_HIT
A valid copy of the requested object was in the cache.

TCP_MISS
The requested object was not in the cache.

TCP_REFRESH_HIT
The requested object was cached but STALE. The IMS query for the object resulted in “304 not modified”.

TCP_REF_FAIL_HIT
The requested object was cached but STALE. The IMS query failed and the stale object was delivered.

TCP_REFRESH_MISS
The requested object was cached but STALE. The IMS query returned the new content.

TCP_CLIENT_REFRESH_MISS
The client issued a “no-cache” pragma, or some analogous cache control… Read the rest

Scaling PHP applications with Varnish

jason — Sat, 11 Jul 2009 13:51:26 +0000

The history of the World Wide Web may be short, but its virtual landscape is already littered with scads of digital dross. The tarnished logos of so many failed dot-coms are strewn to and fro, discarded (or repossessed) servers sit idle, collecting dust, and almost everyone from Silicon Valley to Silicon Alley has a tall tale to tell. "Why, when I was just a lad, we didn’t have fancy WYSIWYG editors. We hand-coded our HTML, and we liked it! Ah, those were the days of baud, boy!"

Thankfully, much has changed from those heady times of the mid-1990s. Designers… Read the rest

Setting up cache parenting with Squid

jason — Tue, 07 Jul 2009 05:10:12 +0000

How do I configure Squid to forward all requests to another cache?

FORWARDING ALL REQUESTS TO ANOTHER CACHE
If your Web proxy machine is behind a firewall, it may well be unable to connect to destination webservers. In this instance, it can be useful to setup an internal proxy and forward all requests to a machine outside the firewall or local network.
First, you need to give Squid a parent cache. Second, you need to tell Squid it can not connect directly to origin servers. This is done with three entries in your squid.conf file:

cache_peer… Read the rest