Buffer Management Apparatus And Method having three states based on Flash Memory

Writing to the present invention, the flash memory-based relates to a buffer management method and apparatus having the three states, more particularly, to an efficient buffer management techniques and new index node read through the divided policy very slow the write operation than the operation flash memory device calculating a reducing to an apparatus and method for improving the use and performance of the storage life of the flash memory-based database systems (DBMS). A buffer management unit having a flash memory based on three states in accordance with an embodiment of the present invention to achieve the above object includes a buffer memory unit, list management, buffer memory management unit and a log buffer.