本文探讨了一种利用CGI程序实现高速数据传输的方法，并在此基础上增加了数据备份功能。当主机处于活动模式时，需要将其数据复制到备用主机中。但问题在于，当主机处于被动模式时是否也需要进行数据复制，以及备用主机是否可以处于非活动状态。为了实施数据复制，需要在传输CGI程序中调用备用主机上的另一个CGI程序。在执行数据传输之前，还需要确定主机当前所处的状态。
A new task is coming. There is a CGI program to transport data in high speed. Now we must add a backup function. When
a host is active mode, it must copy its data into its shadow host which is used to backup.
There is a problem. When a host is in passive mode whether it also duplicate its data? With going into the design more
deeply, we did not know whether a shadow host may be in active or passive mode.
To implement the duplicate data we must invoke another CGI in a shadow host within a transport CGI. Wait a minute. Before
transport data we must make out which mode a host now is in.
The document from Japanese customer is too easy to get more information.
a host is active mode, it must copy its data into its shadow host which is used to backup.
There is a problem. When a host is in passive mode whether it also duplicate its data? With going into the design more
deeply, we did not know whether a shadow host may be in active or passive mode.
To implement the duplicate data we must invoke another CGI in a shadow host within a transport CGI. Wait a minute. Before
transport data we must make out which mode a host now is in.
The document from Japanese customer is too easy to get more information.
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