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USENIX 2001 Abstract
The Multi-Queue Replacement Algorithm for Second Level Buffer Caches
Yuanyuan Zhou and James F. Philbin, NEC Research Institute, Kai Li, Princeton University
Abstract
This paper reports our research results that improve second level
buffer cache performance. Several previous studies have shown that a
good single level cache replacement algorithm such as LRU does not
work well with second level buffer caches. Second level buffer caches
have different access pattern from first level buffer caches because
Accesses to second level buffer caches are actually misses
from first level buffer caches.
The paper presents our study of second level buffer cache access
patterns using four large traces from various servers. We also introduce
a new second level buffer cache replacement algorithm called
Multi-Queue (MQ). Our trace-driven simulation results
show that MQ performs better than all seven
tested alternatives. Our implementation on a real storage system validates
these results.
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