有足够的磁盘空间，可以将源数据库卸载到安装了MTK的系统的文本文件中。
Sufficient disk space to unload the source database to flat files on the system where MTK is installed.
通过支持分区数据库和卸载能力，能够同时扩展多个目录
Scale, with support for partitioned databases and ability to unload to multiple directories in parallel
重要：应确保Directory for data extraction中指定的目录有足够的空间，以便将源数据库卸载到文本文件中。
Important: Ensure that the directory specified in directory for data extraction has plenty of space for unloading the source database into flat files.
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