GALRU: A Group-Aware Buffer Management Scheme for Flash Storage Systems
نویسندگان
چکیده
منابع مشابه
Flash-Aware Buffer Management for Database Systems
Classical buffer replacement policies, e. g., LRU, are suboptimal for database systems having flash disks for persistence, because they are not aware of the distinguished characteristics of flash-based storage devices. We introduce the basic principles of buffer management for such devices and present two efficient buffer algorithms that apply these principles. These algorithms significantly im...
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Classical buffer replacement policies, e.g., LRU, are suboptimal for database systems having flash disks for persistence, because they are not aware of the distinguished characteristics of those storage devices. We present CFDC (Clean-First Dirty-Clustered), a flash-aware buffer management algorithm, which emphasizes that clean buffer pages are first considered for replacement and that modified...
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Due to the limitations of flash memory, such as asymmetric I/O latencies and not-inplace update, two kinds of buffer replacement algorithms exist, namely page-clustered policy and group-clustered policy. The former organizes pages in the page-level, which makes it easy to deal with hot pages, but shows a bad performance when the buffer size is big enough. The latter organizes pages in the group...
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Flash memory has become the most important storage media in mobile devices, and is beginning to replace hard disks in desktop systems. However, its relatively poor random write performance may cause problems in the desktop environment, which has much more complicated requirements than mobile devices. While a RAM buffer has been quite successful in hard disks to mask the low efficiency of random...
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With continuing improvements in both the price and the capacity, flash memory-based storage devices are becoming a viable solution for satisfying high-performance storage demands of desktop systems as well as mobile embedded systems. Because of the erase-before-write characteristic of flash memory, a flash memorybased storage system requires a garbage collection, which often introduces large pe...
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ژورنال
عنوان ژورنال: IEEE Access
سال: 2020
ISSN: 2169-3536
DOI: 10.1109/access.2020.3030089