APPARATUS AND METHOD FOR MANAGING BUFFER HAVING THREE STATES ON THE BASIS OF FLASH MEMORY

摘要

The present invention relates to an apparatus and a method for managing a buffer having three states on the basis of a flash memory and, more specifically, to an apparatus and a method for improving the performance of a database management system (DBMS) on the basis of the flash memory and a use life span of a storage device by reducing a writing operation for a flash memory device in which the writing operation is very slow in comparison with a reading operation, through an efficient buffer managing method and a new index node split policy. To this end, the buffer management device having three states on the basis of the flash memory according to an embodiment of the present invention comprises: a buffer memory unit; a list management unit; a buffer memory management unit; and a log buffer unit.

主权项

1. An apparatus for managing a buffer having three states on the basis of a flash memory, the apparatus comprising:
a buffer memory unit which stores data read from a flash memory in a buffer unit and is divided into a hot region and a cold region according to an access frequency and an access time of the stored buffer unit; a list management unit which divides and writes a state of the stored buffer unit or a state of a part in the buffer unit into a clean list and a dirty list; and a buffer memory management unit which selects a replaced buffer unit by referring to the clean list and the dirty list in the cold region and evicts the selected replaced buffer unit in a buffer cache, when it is required to evict the buffer unit because there is no available space in the buffer memory.