Learning notes-Squid Basics

Server Proxy Cache Technology: SquidSquid uses a separate, non-module, io driver to process customer requests. The supported protocols include HTTP. FTP. SSL. WAIS simple principle: 1. structure: several disks, Several partitions, and several directories 2. query: hashtable in request Hashtable Digesttable: similar to Digest

Server Proxy Cache Technology: Squid uses a separate, non-module, I/o driver to process customer requests. The supported protocols include HTTP. FTP. SSL. WAIS simple principle: 1. structure: several disks = Several partitions = several directories 2. query: Request = hash table = Digest table = file Hash table: similar to Digest

Server Proxy Cache Technology: Squid

Squid uses a separate, non-module, I/o driver to process customer requests. The supported protocols include HTTP. FTP. SSL. WAIS.

Simple principle:

1. Structure: several disks = Several partitions = several directories

2. Query: Request = hash table = Digest table = File

Hash table: similar to outline Digest table: similar directory

3. Working Relationship: child-parent and sibling

Sibling: Neighbor Relationship

 
 

  
  
Common commands:
  
  
#/Usr/local/squid/sbin/squid-z // initialize the cache space
  
  
Ps: there is a problem. The common problem is the directory permission problem chown-R squid: squid/cacheX
  
  
#/Usr/local/squid/sbin/squid-k parse // check squid. conf syntax Configuration
  
  
#/Usr/local/squid/sbin/squid-N-d1 // frontend output
  
  
#/Usr/local/squid/sbin/squid-s // run in the background
  
  
#/Usr/local/squid/sbin/squid-k shutdown // close the service
  
  
#/Usr/local/squid/sbin/squid-k reconfigure // load the new configuration file
  
  
#/Usr/local/squid/sbin/squid-k rotate round-robin logs
  
  
Add squid to system startup Item
  
  
Edit/etc/rc. d/rc. local
  
  
Add the following lines:/usr/local/squid/sbin/squid-s
  
  
 
  
  
# More/usr/local/squid/var/logs/access. log | grep TCP_MEM_HIT
  
  
This command shows which files are cached to the memory during squid operation,
  
  
And return it to the access user.
  
  
# More/usr/local/squid/var/logs/access. log | grep TCP_HIT
  
  
This command shows which files are cached by squid to the cache during squid operation.
  
  
Directory and return it to the access user.
  
  
# More/usr/local/squid/var/logs/access. log | grep TCP_MISS
  
  
This command shows that some files are not cached by squid while squid is running.
  
  
Is to obtain data from the original server and return it to the access user.
  
  
 
  
  
Squid hit rate analysis
  
  
Squid/bin/squidclient-p 80 mgr: info // some running status information
  
  
Squid/bin/squidclient-p 80 mgr: 5 min // 5 min Information
  
  
Obtain squid memory usage:
  
  
Squidclient-p 80 mgr: mem
  
  
# Retrieve the cached squid list:
  
  
# Squidclient-p 80 mgr: objects
  
  
Obtain the disk usage of squid:
  
  
Squidclient-p 80 mgr: diskd
  
  
Force update a url:
  
  
Squidclient-p 80-mb purge http://www.xxxx.com/static. php
  
  
For more information, see:
  
  
Squidclient-h or squidclient-p 80 mgr:
  
  
Hit rate:
  
  
/Usr/local/squid/bin/squidclient-h 1.1.1.1-p80 mgr: info
  
  
/Usr/local/squid/bin/squidclient-h specific IP address-p80 mgr: info