FBARC: I/O Asymmetry-Aware Buffer Replacement Strategy

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Provided by: University of Trás-os-Montes and Alto Douro
Topic: Storage
Format: PDF
Buffer Management is central to database systems; it minimizes the access gap between memory and disk. Primary criterion of most buffer management strategies is hitrate maximization (based on recency, frequency). New storage technologies exhibit characteristics such as read/write asymmetry and low read latency. These have significant impact on the buffer manager: due to asymmetry the cost of page eviction may be several times higher than the cost of fetching a page. Hence, buffer management strategies for modern storage technologies must consider write-awareness and spatial locality besides hitrate.
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