wget 对于相同的获取有不同的响应时间

Question

知道为什么一次提取会快速提取文件（本例中为大图）而另一次提取会缓慢提取同一文件吗？在家里没有看到这个问题。通过映射到 192.xx.xx.xx 的 IP 地址没有看到这个问题。只有当 IP 是公共 IP 但仍通过公司内部网络时才会看到这个问题。任何想法都会有所帮助。

Resolving undisclosed_site... --17:59:05--  http://undisclosed_site.com/LinkOne/195000.jpg
           => `195000.jpg'
Resolving undisclosed_site.com... public_ip
Connecting to undisclosed_site[public_ip]:80... connected.
HTTP request sent, awaiting response... 200 OK

Length: 2,154,765 [image/jpeg]

    0K .......... .......... .......... .......... ..........  2%   96.90 KB/s
   50K .......... .......... .......... .......... ..........  4%  246.31 KB/s
  100K .......... .......... .......... .......... ..........  7%  641.03 KB/s
  150K .......... .......... .......... .......... ..........  9%  641.03 KB/s
  200K .......... .......... .......... .......... .......... 11%  318.47 KB/s
  250K .......... .......... .......... .......... .......... 14%  641.03 KB/s
  300K .......... .......... .......... .......... .......... 16%  641.03 KB/s
  350K .......... .......... .......... .......... .......... 19%  458.72 KB/s
  400K .......... .......... .......... .......... .......... 21%  641.03 KB/s
  450K .......... .......... .......... .......... .......... 23%    1.53 MB/s
  500K .......... .......... .......... .......... .......... 26%  641.03 KB/s
  550K .......... .......... .......... .......... .......... 28%  806.45 KB/s
  600K .......... .......... .......... .......... .......... 30%  400.00 KB/s
  650K .......... .......... .......... .......... .......... 33%    1.04 MB/s
  700K .......... .......... .......... .......... .......... 35%  793.65 KB/s
  750K .......... .......... .......... .......... .......... 38%  458.72 KB/s
  800K .......... .......... .......... .......... .......... 40%  641.03 KB/s
  850K .......... .......... .......... .......... .......... 42%  641.03 KB/s
  900K .......... .......... .......... .......... .......... 45%    3.05 MB/s
  950K .......... .......... .......... .......... .......... 47%  531.91 KB/s
 1000K .......... .......... .......... .......... .......... 49%  357.14 KB/s
 1050K .......... .......... .......... .......... .......... 52%  641.03 KB/s
 1100K .......... .......... .......... .......... .......... 54%  793.65 KB/s
 1150K .......... .......... .......... .......... .......... 57%  806.45 KB/s
 1200K .......... .......... .......... .......... .......... 59%  641.03 KB/s
 1250K .......... .......... .......... .......... .......... 61%  632.91 KB/s
 1300K .......... .......... .......... .......... .......... 64%  641.03 KB/s
 1350K .......... .......... .......... .......... .......... 66%    1.58 MB/s
 1400K .......... .......... .......... .......... .......... 68%  531.91 KB/s
 1450K .......... .......... .......... .......... .......... 71%  641.03 KB/s
 1500K .......... .......... .......... .......... .......... 73%  357.14 KB/s
 1550K .......... .......... .......... .......... .......... 76%  531.91 KB/s
 1600K .......... .......... .......... .......... .......... 78%    3.05 MB/s
 1650K .......... .......... .......... .......... .......... 80%  531.91 KB/s
 1700K .......... .......... .......... .......... .......... 83%  641.03 KB/s
 1750K .......... .......... .......... .......... .......... 85%  537.63 KB/s
 1800K .......... .......... .......... .......... .......... 87%  632.91 KB/s
 1850K .......... .......... .......... .......... .......... 90%  357.14 KB/s
 1900K .......... .......... .......... .......... .......... 92%  793.65 KB/s
 1950K .......... .......... .......... .......... .......... 95%  641.03 KB/s
 2000K .......... .......... .......... .......... .......... 97%  641.03 KB/s
 2050K .......... .......... .......... .......... .......... 99%    3.05 MB/s
 2100K ....                                                  100%    4.16 MB/s

17:59:09 (538.59 KB/s) - `195000.jpg' saved [2154765/2154765]

--17:59:20--  http://undisclosed_site.com/LinkOne/195000.jpg
           => `195000.jpg.1'
Resolving undisclosed_site.com... public_ip
Connecting to undisclosed_site[public_ip]:80... connected.
HTTP request sent, awaiting response... 200 OK

Length: 2,154,765 [image/jpeg]

    0K .......... .......... .......... .......... ..........  2%    5.74 KB/s
   50K .......... .......... .......... .......... ..........  4%    1.62 KB/s
  100K .......... .......... .......... .......... ..........  7%    8.14 KB/s
  150K .......... .......... .......... .......... ..........  9%   14.10 KB/s
      200K .......... .......... .......... .......... .......... 11%    5.10 KB/s
  250K .......... .......... .......... .......... .......... 14%   11.07 KB/s
  300K .......... .......... .......... .......... .......... 16%    2.68 KB/s
  350K .......... .......... .......... .......... .......... 19%   15.38 KB/s
  400K .......... .......... .......... .......... .......... 21%    8.38 KB/s
  450K .......... .......... .......... .......... .......... 23%   17.98 KB/s
  500K .......... .......... .......... .......... .......... 26% 1007.93 B/s
  550K .......... .......... .......... .......... .......... 28%    3.18 KB/s
  600K .......... .......... .......... .......... .......... 30%   12.90 KB/s
  650K .......... .......... .......... .......... .......... 33%   12.85 KB/s
  700K .......... .......... .......... .......... .......... 35%   15.76 KB/s
  750K .......... .......... .......... .......... .......... 38%   16.93 KB/s
  800K .......... .......... .......... .......... .......... 40%    1.39 KB/s
  850K .......... .......... .......... .......... .......... 42%    5.72 KB/s
  900K .......... .......... .......... .......... .......... 45%    5.21 KB/s
  950K .......... .......... .......... .......... .......... 47%   13.73 KB/s
 1000K .......... .......... .......... .......... .......... 49%   11.60 KB/s
 1050K .......... .......... .......... .......... .......... 52%   11.90 KB/s
 1100K .......... .......... .......... .......... .......... 54%   69.54 KB/s
 1150K .......... .......... .......... .......... .......... 57%   17.58 KB/s
 1200K .......... .......... .......... .......... .......... 59%    5.98 KB/s
 1250K .......... .......... .......... .......... .......... 61%   10.29 KB/s
 1300K .......... .......... .......... .......... .......... 64%    1.19 KB/s
 1350K .......... .......... .......... .......... .......... 66%    5.50 KB/s
 1400K .......... .......... .......... .......... .......... 68%   13.68 KB/s
 1450K .......... .......... .......... .......... .......... 71%  769.74 B/s
 1500K .......... .......... .......... .......... .......... 73%    4.69 KB/s
 1550K .......... .......... .......... .......... .......... 76%    1.64 KB/s
 1600K .......... .......... .......... .......... .......... 78%    7.26 KB/s
 1650K .......... .......... .......... .......... .......... 80%    9.79 KB/s
 1700K .......... .......... .......... .......... ...

Answer 1

任何想法都会有帮助。

您的公司内部网络与其他人共享，他们的活动可能会偶尔造成拥塞。如果有网络管理员，她可能能够找出问题的原因。

Answer 2

如果我正确理解了您的问题，您是说当您使用服务器的内部地址（例如 192.168.8.69）时，wget 运行得很快。但是当您使用服务器的公共可路由 IP 地址（例如 75.34.275.123）时，wget 的运行速度会慢得多。如果这是您问的问题，则取决于您如何设置路由。这里我们配置了网关路由器，如果它看到有请求发往我们的某个服务器地址，它会立即将其转回来并发送到内部地址。如果您的路由器没有这样设置，那么对公共可路由地址的请求就会发送到互联网并返回到服务器，从而导致 wget 时间的差异。或者，如果您使用服务器的网址，则取决于 DNS。如果您没有在网络内部运行 DNS，那么请求必须发送到 DNS 进行解析然后返回。