It is this feature of the load option that makes it function as a filter for data to be loaded.
这是加载选项的一个特性，这个特性使其功能就像是一个要加载的数据的过滤器。
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The output from this is huge, even on a lightly loaded system, so you typically either supply the name of a directory as a command-line argument or use a pipe to filter its output.
After the filter is loaded, all Soap message requests for Web services on your server create new log documents in the SoapLog.nsf database (see figures 12 and 13).