squid代理服务器设置问题

think365

下面的配置已经设定了缓存，
我访问baidu.com首页很多次应该缓存下这个页面了吧。。。
但是关闭了两个父节点后，访问baidu.com怎么显示错误的？？？

应该从缓存中读取处baidu.com的首页才对啊？？？


acl all src all
acl manager proto cache_object
acl localhost src 127.0.0.1/32
acl to_localhost dst 127.0.0.0/8
acl localnet src 10.0.0.0/8     # RFC1918 possible internal network
acl localnet src 172.16.0.0/12  # RFC1918 possible internal network
acl localnet src 192.168.0.0/16 # RFC1918 possible internal network
acl SSL_ports port 443
acl Safe_ports port 80          # http
acl Safe_ports port 21          # ftp
acl Safe_ports port 443         # https
acl Safe_ports port 70          # gopher
acl Safe_ports port 210         # wais
acl Safe_ports port 1025-65535  # unregistered ports
acl Safe_ports port 280         # http-mgmt
acl Safe_ports port 488         # gss-http
acl Safe_ports port 591         # filemaker
acl Safe_ports port 777         # multiling http
acl CONNECT method CONNECT
http_access allow all
http_access allow manager localhost
http_access deny manager
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports
http_access allow localnet
http_access deny all
icp_access allow localnet
icp_access deny all
http_port 808
   cache_peer 222.205.9.13  parent  808  7 login=x:x default no-query round-robin
   cache_peer 222.205.9.15  parent  808  7 login=x:x default no-query round-robin

hierarchy_stoplist cgi-bin ?
cache_mem 64 MB
cache_dir ufs /usr/var/cache 500 16 256
access_log /usr/var/logs/access.log squid
refresh_pattern ^ftp:           1440    20%     10080
refresh_pattern ^gopher:        1440    0%      1440
refresh_pattern -i (/cgi-bin/|\?) 0     0%      0
refresh_pattern .               0       20%     4320
acl shoutcast rep_header X-HTTP09-First-Line ^ICY\s[0-9]
upgrade_http0.9 deny shoutcast
acl apache rep_header Server ^Apache
broken_vary_encoding allow apache
visible_hostname test.zju.edu.cn
never_direct allow all
dns_nameservers 10.10.0.21
coredump_dir /usr/var/cache