File-redirection operator appends to an existing file.
文件重定向操作符向现有文件附加内容。
This behaviour is similar to high performance loader when it USES the light appends to load the data.
这种行为类似于高性能加载器使用“轻追加法”加载数据时的行为。
The former operator appends to the existing file (so data may still be recovered), and the latter overwrites existing content.
前一个操作符在现有文件中追加内容(所以仍然可以恢复数据),后者覆盖现有内容。
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