For a long time researchers only focus on disk-based index, but research on memory-based index is of great value today because of the massmemory condition.
以往大部分学者都集中研究磁盘索引,但其实在目前大内存的环境下对内存索引的研究也是非常必要。
3
The reason is very simple, is the monolithic integrated circuit does not have home computer such CPU, also has not looked like the hard disk such massmemory equipment.