SquidPrinciple
SquidLinuxCacheInternetdataserversoftware，UserDownloadDownloaddata。UserDownloadwww.idcshare，requestsquid，suqidconnectionwww.idcsharerequest，NextUser.Userrequest，squiddisk，dataUser.
Squid
1） client：HTTP .FTP.Gopher.WAIS.SSL
2） CacheManagement：ICP(Internet Cache). HTCP().SNNP. Cache Digests
:
1) ClientServer；
2) Server，『』『』？If，，Proxy，ServerClient。
3) ServerFirst，cache Client，If，ClientInternet；
4) dataclient
5）1, 2, 3cache，， ProxyInternet；
6）， proxy『cache』；
7）FinallyClient。
server
：
1) Cache
2) ipinternet
3) networkSecurity
4) UserManagement
：
1） server
2） server
3） reverse proxyserver
Installation
1）CompilationOptimization
，OptimizationparameterexportcommandCFLAGSCXXFLAGS，Thenconfigure，makeOptimizationparameter。AddOptimizationparameter，CPUsystemOptimization，file、CPU、memory。Optimization，systemplatform。
[root@server soft]# cat /proc/cpuinfo |more
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 23
model name : Intel(R) Xeon(R) CPU E5420 @ 2.50GHz
stepping : 10
cpu MHz : 2493.978
cache size : 6144 KB
physical id : 0
siblings : 4
core id : 0
cpu cores : 4
apicid : 0
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush d
ts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc pni monitor ds_cpl vmx est tm2 cx16 xtpr
lahf_lm
bogomips : 4987.95
Configuration：
[root@server soft]#export CHOST="i686-pc-linux-gnu"
[root@server soft]#export CFLAGS="-march=Prescott -O2 -pipe -fomit-frame-pointer"
[root@server soft]#export CXXFLAGS="${CFLAGS}"
[root@server soft]#env
SettingsEnvironmentvariable
，Description.
3）parameter
fileMeanwhilefile，default1024。In other words，Iffile，Meanwhile1024file，SquidMeanwhilefile，，response，file.
：a.Usersquid，squidfile，ThenfileUser。
b.squidfile，Usersquid，squidUser。，Userrequest。
Firstfile。
/usr/include/bits/typesizes.h
/usr/include/linux/posix_types.h
vifile
#define __FD_SETSIZE 1024
102465536，Then，Linux。
/usr/include/bits/typesizes.h
/usr/include/linux/posix_types.h
vifile
#define __FD_SETSIZE 1024
102465536，Then，Linux。
fileC/C++file，Compilationsquid。file，CurrentlyEnvironmentSettings。sshLoginsystem。LoginprocessSettings，DisableCurrentlyLogin，EnvironmentvariableSettings.
ulimitSettingsCurrentlyEnvironment。commandEnvironmentSettings，LogoutCurrentlyLoginprocesscommand。
command
[root@server soft]#ulimit -Hs 65536
[root@server soft]#ulimit -n 65536
，，：
vi /etc/security/limits.conf，
* soft nofile 65536
* hard nofile 65536
Hparameter，s，nfile。
：
ulimit parameter:
-H Settingshardware.
-S Settingssoftware.
-a Currently.
-c size:Settingscorefile.:blocks
-d size:Settingsdata.:kbytes
-f size:SettingsCreatefile.:blocks
-l size:Settingsmemoryprocess.:kbytes
-m size:Settingsmemory.:kbytes
-n size:SettingsMeanwhilefile.:n
-p size:Settings.:kbytes
-s size:Settings.:kbytes
-t size:SettingsCPU.:seconds
-v size:Settingsmemory.:kbytes
-H Settingshardware.
-S Settingssoftware.
-a Currently.
-c size:Settingscorefile.:blocks
-d size:Settingsdata.:kbytes
-f size:SettingsCreatefile.:blocks
-l size:Settingsmemoryprocess.:kbytes
-m size:Settingsmemory.:kbytes
-n size:SettingsMeanwhilefile.:n
-p size:Settings.:kbytes
-s size:Settings.:kbytes
-t size:SettingsCPU.:seconds
-v size:Settingsmemory.:kbytes
InstallationConfiguration
Installation
[root@server soft]# tar -zxvf squid-3.0.STABLE24.tar.gz
[root@server soft]# cd squid-3.0.STABLE24
[[email protected]]#./configure –prefix=/usr/local/squid/–enable-gnuregex/–enable-icmp/–enable-linux-netfilter/–enable-default-err-language="Simplify_Chinese"/–enable-kill-parent-hack/–enable-cache-digests/–enable-dlmalloc/–enable-poll/–enable-async-io=240/–enable-delay-pools/–with-filedescriptors=65536/–enable-snmp/–enable-arp-acl/–mandir=/usr/share/man/–with-large-files
：
command
[root@viong squid-3.0.STABLE24]# ./configure –help
–enable-gnuregex
Configuration，squid。GNUsquid；operating system。./configurescriptsystem，，GNU。IfBecause，GNU，For instanceproxy。，./configurecommand.
–enable-icmp
squidICMPmessage，ping。Functions。
–enable-linux-netfilter
Netfilterlinux 2.4。linux2.4versionHTTPFunctions，。
–enable-default-err-language=lang
Settingserror_directorydefault。For example，，：
% ./configure –enable-default-err-language=Dutch
squid.conferror_directory，A。，defaulterror。
–enable-kill-parent-hack
squid，parent process
–enable-cache-digests
CacheICP，
–enable-dlmalloc[=LIB]
system，memory（malloc）squid。–enable-dlmallocsquiddlmallocCompilation。systemInstallationdlmalloc，=LIBparameterpath。
–enable-poll
unixfunctionI/Oeventfile：select()poll()../configurescriptpoll()select().poll()，。
–enable-async-io[=N_THREADS]
I/Osquidtechnology，Performance。aufsmodulethreaddiskI/O。linuxsolarissystem。=N_THREADSparametersquidthread。IfserverConfiguration，160。If，40.
Note: –enable-async-io./configure，：
–with-aufs-threads=N_THREADS
–with-pthreads
–enable-storeio=ufs,aufs
–enable-delay-pools
squidbandwidthtechnology。clientIPAddress。clientrequestcache，response
–with-filedescriptors=65536
file
–enable-snmp
networkManagement(SNMP)networkserver。CompilationCompilationSNMP，versionCMU SNMP。
–enable-arp-acl
MACAddress
–mandir=/usr/share/man
manInstallationdirectory
–with-large-files
log2G
[root@server squid-3.0.STABLE24]# make; make install
make[3]: Leaving directory `/root/soft/squid-3.0.STABLE24/tools'
make[2]: Leaving directory `/root/soft/squid-3.0.STABLE24/tools'
make[1]: Leaving directory `/root/soft/squid-3.0.STABLE24/tools'
make[1]: Entering directory `/root/soft/squid-3.0.STABLE24'
Build Successful.
make[2]: Entering directory `/root/soft/squid-3.0.STABLE24'
make[2]: Nothing to be done for `install-exec-am'.==================DescriptionInstallationsuccess
make[2]: Nothing to be done for `install-data-am'.
make[2]: Leaving directory `/root/soft/squid-3.0.STABLE24'
make[1]: Leaving directory `/root/soft/squid-3.0.STABLE24'
[root@server squid-3.0.STABLE24]#
[root@server squid-3.0.STABLE24]# ll /usr/local/squid–enable-gnuregex/
24
drwxr-xr-x 2 root root 4096 03-04 23:35 bin
drwxr-xr-x 2 root root 4096 03-04 23:35 etc
drwxr-xr-x 2 root root 4096 03-04 23:35 libexec
drwxr-xr-x 2 root root 4096 03-04 23:35 sbin
drwxr-xr-x 5 root root 4096 03-04 23:35 share
drwxr-xr-x 3 root root 4096 03-04 23:35 var
bin/ ：squidscriptsdirectory，RunCache；
etc/ ：squid；
libexec/ ：；
sbin/ ：squid！
share/ ：error，directory；
var/ ：log file，，！
squid，Settings/usr/local/squid/var，/usr/local/squid/etc/squid.confAdd，visible_hostnam viong http_port port.80
[root@server squid-3.0.STABLE24]# chown -R nobody:nobody /usr/local/squid/var
[root@server squid-3.0.STABLE24]# /usr/local/squid/sbin/squid –zD
squidcache，squidDNSStart，CurrentlyConfiguration，DNSTesting，squidStart
Squid[root@viong soft]# netstat -ntpl |grep 80
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN
[root@server squid-3.0.STABLE24]# /usr/local/squid/bin/squidclient -p 80 -h localhost mgr:info
squid
HTTP/1.0 200 OK
Server: squid/3.0.STABLE24
Mime-Version: 1.0
Date: Fri, 05 Mar 2010 14:43:26 GMT
Content-Type: text/plain
Expires: Fri, 05 Mar 2010 14:43:26 GMT
Last-Modified: Fri, 05 Mar 2010 14:43:26 GMT
X-Cache: MISS from viong
Via: 1.0 viong (squid/3.0.STABLE24)
Proxy-Connection: close
Squid Object Cache: Version 3.0.STABLE24
Start Time: Fri, 05 Mar 2010 14:42:48 GMT
Current Time: Fri, 05 Mar 2010 14:43:26 GMT
Connection information for squid:
Number of clients accessing cache: 1
Number of HTTP requests received: 0
Number of ICP messages received: 0
Number of ICP messages sent: 0
Number of queued ICP replies: 0
Number of HTCP messages received: 0
Number of HTCP messages sent: 0
Request failure ratio: 0.00
Average HTTP requests per minute since start: 0.0
Average ICP messages per minute since start: 0.0
Select loop called: 8659 times, 4.376 ms avg
Cache information for squid:
Hits as % of all requests: 5min: 0.0%, 60min: 0.0%
Hits as % of bytes sent: 5min: -0.0%, 60min: -0.0%
Memory hits as % of hit requests: 5min: 0.0%, 60min: 0.0%
Disk hits as % of hit requests: 5min: 0.0%, 60min: 0.0%
Storage Swap size: 0 KB
Storage Swap capacity: 0.0% used, 100.0% free
Storage Mem size: 104 KB
Storage Mem capacity: 1.3% used, 98.7% free
Mean Object Size: 0.00 KB
Requests given to unlinkd: 0
Median Service Times (seconds) 5 min 60 min:
HTTP Requests (All): 0.00000 0.00000
Cache Misses: 0.00000 0.00000
Cache Hits: 0.00000 0.00000
Near Hits: 0.00000 0.00000
Not-Modified Replies: 0.00000 0.00000
DNS Lookups: 0.00000 0.00000
ICP Queries: 0.00000 0.00000
Resource usage for squid:
UP Time: 37.890 seconds
CPU Time: 0.070 seconds
CPU Usage: 0.18%
CPU Usage, 5 minute avg: 0.00%
CPU Usage, 60 minute avg: 0.00%
Process Data Segment Size via sbrk(): 2784 KB
Maximum Resident Size: 0 KB
Page faults with physical i/o: 0
Memory usage for squid via mallinfo():
Total space in arena: 3052 KB
Ordinary blocks: 2938 KB 1 blks
Small blocks: 0 KB 0 blks
Holding blocks: 1520 KB 8 blks
Free Small blocks: 0 KB
Free Ordinary blocks: 113 KB
Total in use: 4458 KB 98%
Total free: 113 KB 2%
Total size: 4572 KB
Memory accounted for:
Total accounted: 1886 KB 41%
memPool accounted: 1886 KB 41%
memPool unaccounted: 2685 KB 59%
memPoolAlloc calls: 1504
memPoolFree calls: 481
File descriptor usage for squid:
Maximum number of file descriptors: 65536 =============file
Largest file desc currently in use: 16
Number of file desc currently in use: 10
Files queued for open: 0
Available number of file descriptors: 1014
Reserved number of file descriptors: 100
Store Disk files open: 0
Internal Data Structures:
26 StoreEntries
26 StoreEntries with MemObjects
25 Hot Object Cache Items
0 on-disk objects
：
Squidclientparameter：
squid： squidclient -p 80 mgr:info
squidmemory： squidclient -p 80 mgr:mem
squidCache： squidclient -p 80 mgr:objects
squiddisk： squidclient -p 80 mgr:diskd
squid： squidclient -p 80 mgr:info
squidmemory： squidclient -p 80 mgr:mem
squidCache： squidclient -p 80 mgr:objects
squiddisk： squidclient -p 80 mgr:diskd
ulimit -HSn 65536 ,squidStartscript，replicationscriptsquid.sh
#!/bin/sh
#
ulimit -HSn 65536
# starts and stops Squid
case "$1" in
start)
/usr/local/squid/sbin/squid -s
echo -n ' Squid'
;;
stop)
/usr/local/squid/sbin/squid -k shutdown
;;
esac
#
ulimit -HSn 65536
# starts and stops Squid
case "$1" in
start)
/usr/local/squid/sbin/squid -s
echo -n ' Squid'
;;
stop)
/usr/local/squid/sbin/squid -k shutdown
;;
esac
StartStopsquid，command
[root@viong soft]# sh squid.sh stop
[root@viong soft]# sh squid.sh start
http://viong.blog.51cto.com/844766/280978
http://viong.blog.51cto.com/844766/280978