2012•Unpublished venueRequires access

A Cost-aware Buffer Replacement Strategy for Flash-based Databases

Sunghwan Park, Sang‐Won Park

Abstract

This paper presents an efficient buffer replacement algorithm for flash-based databases. LRU and CFLRU(clean-first LRU) are used as buffer replacement algorithms for flash-aware systems. The performance of LRU is poor when flash memory is used as a database storage. Although CFLRU which is designed for flash-aware systems reduces the number of flash operations of dirty pages, its performance can be better when considering the cost of operations in the flash memory. FTL(flash translation layer) is a system software which shows a storage as a block device. In this paper, we suggests a new method in which the page whose processing cost is minimum is processed ahead.

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Key concepts: Flash file system, Computer science, Flash memory, Flash (photography), Flash memory emulator, Database, Write buffer, Operating system