<![CDATA[曲文庆's Blog]]> http://www.quwenqing.com/ zh-tw F2blog .cont 1.1 Build 090810 曲文庆's Blog http://www.quwenqing.com/attachments/8278598901.jpg http://www.quwenqing.com/ 曲文庆's Blog http://www.quwenqing.com/read-179.html <![CDATA[Varnish 中两个重要的子程序]]> Fri, 26 Oct 2012 17:06:19 +0800 http://www.quwenqing.com/read-179.html 目前varnish已经到了3.0.3，今天因处理问题，看了一些2.x的资料，感觉还是有一定同性和收获

https://www.varnish-cache.org/trac/wiki/Introduction

HHow VCL works

There are actually 8 subroutines that control how Varnish behaves, and that you can change in your Varnish config. They are:

vcl_recv()

Called after a request is received from the browser, but before it is processed.

vcl_pipe()

Called when a request must be forwarded directly to the backend with minimal handling by Varnish (think HTTP CONNECT)

vcl_hash()

Called to determine the hash key

]]> http://www.quwenqing.com/read-5.html <![CDATA[Squid refresh_pattern 相关]]> Thu, 16 Oct 2008 17:07:55 +0800 http://www.quwenqing.com/read-5.html Synopsis
The way how the objects in the cache be refreshed is defined using this tag. By default, regular expressions are CASE-SENSITIVE.  To make them case-insensitive, use the -i option.

Basically a cached object is:
FRESH  if expires < now, else STALE
STALE  if age > max
FRESH  if lm-factor < percent, else STALE
FRESH
 if age < min
else  STALE

The refresh_pattern lines are checked in the order listed here. The first entry which matches is used.  If none o]]>