该方法结合内存表和磁盘表两种机制，不但提供快速的性能，而且解决了内存表的永久保存问题。

This method combines memory-based table with disk-based table, it not only provides good performance, but also solves the problem of memory table's permanent storage.

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因此，它需要消耗大量的磁盘空间，当表比较大时这一点尤为明显。

Therefore, it consumes a lot of disk space, especially when the table is too big.

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用于该基准的数据库必须有10tb的原始数据，并且有高效的磁盘扫描和表连接算法。

The database used for this benchmark is defined with 10tb of raw data and requires highly efficient disk scanning and table joining algorithms.

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