quid cache(簡稱為Squid)是一個流行的自由軟件(GNU通用公共許可證)的代理服務器和Web緩存服務器。Squid有廣泛的用途，從作為網頁服務器的前置cache服務器緩存相關請求來提高Web服務器的速度，到為一組人共享網絡資源而緩存萬維網，域名系統和其他網絡搜索，到通過過濾流量幫助網絡安全，到局域網通過代理上網。Squid主要設計用于在Unix一類系統運行,下面我們來看看squid3(高命中率)緩存服務器配置教程。

　　今天對我的varnish進行了下小小的壓力測試,40s里的8000并發,沒有失敗一個,估計還可以承受更大的并發,先不說varnish了,我最近找到個命中率很高的squid的配置文件,當然是squid3.0的配置文件,有需要的可以copy回去自己改.

　　系統:centos 5.x

　　需要的軟件:squid-3.0.STABLE25.tar.gz

　　1.下載squid

　　2.編譯squid

./configure --prefix=/usr/local/squid  --enable-async-io=100  --with-pthreads  --enable-storeio="aufs,diskd,ufs"  --enable-removal-policies="heap,lru"  --enable-icmp  --enable-delay-pools  --enable-useragent-log  --enable-referer-log  --enable-kill-parent-hack  --enable-arp-acl  --enable-default-err-language=Simplify_Chinese  --enable-err-languages="Simplify_Chinese English"  --disable-poll  --disable-wccp  --disable-wccpv2  --disable-ident-lookups  --disable-internal-dns  --enable-basic-auth-helpers="NCSA"  --enable-stacktrace  --with-large-files  --disable-mempools  --with-filedescriptors=65536  --enable-ssl  --enable-x-accelerator-var

make make install make install-pinger

　　3.配置squid

　　squid.conf里的內容:

#accel listen port http_port 80 accel vhost vport #accel domain cache_peer xx.xx.xx.xx parent 80 0 no-query originserver no-digest name=a cache_peer_domain a www.111cn.net   #acl acl manager proto cache_object acl localhost src 127.0.0.1/255.255.255.255 acl SSL_ports port 443 563 acl Safe_ports port 80       # http acl Safe_ports port 8080 acl LanSrc src all acl LanDst dst all acl LanDstDM dstdomain www.111cn.net   acl CONNECT method CONNECT http_access allow manager localhost http_access deny manager http_access deny !Safe_ports http_access deny CONNECT !SSL_ports http_access allow LanSrc http_access allow LanDst http_access allow LanDstDM http_access deny   all   #base visible_hostname www.111cn.net cache_mgr rocdk890@gmail.com cache_effective_user squid cache_effective_group squid   error_directory /usr/local/squid/share/errors/Simplify_Chinese icon_directory /usr/local/squid/share/icons mime_table /usr/local/squid/etc/mime.conf   cache_replacement_policy lru #cache_dir cache_dir aufs /var/cache1 32768 64 64 cache_dir aufs /var/cache2 32768 64 64 cache_mem 2048 MB max_open_disk_fds 0 #maximum_object_size 512 KB #maximum_object_size_in_memory 256 KB maximum_object_size 20 MB maximum_object_size_in_memory 8 MB   #keepalived client_persistent_connections off server_persistent_connections on #persistent_request_timeout 60 seconds   #memory_pools on #memory_pools_limit 64 MB   forwarded_for on log_icp_queries off   via off httpd_suppress_version_string off   ie_refresh off tcp_recv_bufsize 32 KB   #acl webservices rep_header Server -i ^linuxtoneWS ^Apache ^nginx #broken_vary_encoding allow webservices   #hidden the squid header #reply_header_access Server deny all #reply_header_access X-Cache deny all #reply_header_access Warning deny all #reply_header_access Expires deny all #reply_header_access Cache-Control deny all #reply_header_access age deny all #reply_header_access All deny all   ipcache_size 1024 ipcache_low 90 ipcache_high 95   memory_replacement_policy lru   hosts_file /etc/hosts request_header_max_size 128 KB   #deny cache hierarchy_stoplist cgi-bin ? .php acl QUERY urlpath_regex cgi-bin? .php cache deny QUERY   #request_body_max_size 0 KB   refresh_pattern ^ftp:           60      20%     10080 refresh_pattern ^gopher:        60      0%      1440 refresh_pattern .               0       20%     1440 refresh_pattern -i .css$       360    50%     2880    reload-into-ims refresh_pattern -i .js$        1440    50%     2880    reload-into-ims refresh_pattern -i .html$        720   50%     1440    reload-into-ims refresh_pattern -i .jpg$       1440    90%     2880    ignore-reload refresh_pattern -i .gif$       1440    90%     2880    ignore-reload refresh_pattern -i .swf$       1440    90%     2880    ignore-reload refresh_pattern -i .jpg$       1440      50%     2880    ignore-reload refresh_pattern -i .png$       1440      50%     2880      ignore-reload refresh_pattern -i .bmp$       1440      50%     2880      ignore-reload   refresh_pattern -i .doc$ 1440    50%     2880      ignore-reload refresh_pattern -i .ppt$ 1440    50%     2880      ignore-reload refresh_pattern -i .xls$ 1440    50%     2880      ignore-reload refresh_pattern -i .pdf$ 1440    50%     2880      ignore-reload refresh_pattern -i .rar$       1440    50%     2880      ignore-reload refresh_pattern -i .zip$ 1440    50%     2880      ignore-reload refresh_pattern -i .txt$ 1440    50%     2880      ignore-reload   quick_abort_min 20 KB quick_abort_max 20 KB quick_abort_pct 95   connect_timeout 1 minute negative_ttl 0 minutes read_timeout 30 seconds pconn_timeout 120 seconds shutdown_lifetime 5 seconds strip_query_terms off   #snmp #snmp_port 3401 #acl snmppublic snmp_orgmunity snsimg #snmp_access allow snmppublic localhost #snmp_access deny all   icp_port 0   # logfile emulate_httpd_log on #logformat combined %{X-Forwarded-For}>h %ui %un [%tl] “%rm %ru HTTP/%rv” %Hs %<st “%{Referer}>h” “%{User-Agent}>h” %Ss:%Sh #access_log none #access_log /data/logs/access.log combined logformat squid  %ts.%03tu %6tr %>a %Ss/%03Hs %<st %rm %ru %un %Sh/%<A %mt access_log /var/log/squid/access.log squid #cache_store_log /var/log/squid/store.log cache_store_log /dev/null cache_log /var/log/squid/cache.log logfile_rotate 12   # MISCELLANEOUS store_objects_per_bucket 15 client_db off

　　4.創建目錄

/usr/sbin/groupadd squid /usr/sbin/useradd -g squid squid mkdir -p /var/log/squid chown -R squid:squid /var/log/squid mkdir -p /var/{cache1,cache2} chown -R squid:squid /var/{cache1,cache2}

初始化squid的cache目錄 /usr/local/squid/sbin/squid -z

啟動squid /usr/local/squid/sbin/squid -D

　　如果大家不喜歡這樣的啟動方式,可以自己去找個squid的啟動腳本,這里就不放出了.當squid運行起來了之后,大家可以使用下面這個命令來查看命中率:

　　好了,具體其他squid的使用命令就只能你們自己去搜了,就到這里了.