Buffer Cache Management of Smartphones Exploiting Write-Only-Once Characteristics
준회원, 이화여자대학교 컴퓨터공학과, Dohee Kim, Hyokyung Bahn · 한국인터넷방송통신학회 논문지 · 2015
This paper analyzes file access characteristics of smartphone apps and finds that a large portion of file writes are performed only once. Based on this observation, we present a new buffer cache management scheme that considers this characteristics. Buffer cache improves storage performance by maintaining hot file data in memory thereby servicing subsequent requests without storage accesses. However, it should flush modified data to storage in order to resist system crashes. The proposed scheme evicts cache data that has been written only once upon flushes, thus improving cache space utilization. Simulation experiments show that the proposed scheme improves cache hit ratio by 5-33% and power consumption by 27-92%.