Geodesic
A Flash-Aware Buffering Scheme with the On-the-Fly Redo for Efficient Data Management in Flash Storage
Computer Science and Information Systems, Tome 14 (2017) no. 2.

Voir la notice de l'article provenant de la source Computer Science and Information Systems website

Thanks to remarkably fast random reads and rapidly decreasing prices per bit, flash storage has been regarded as a promising alternative to traditional hard disk drives (HDDs). Although flash storage has many distinguished hardware features, it still suffers from the poor I/O performance in the case of update operations. Due to the absence of in-place updates, differently from HDDs, flash storage needs to modify data through out-of-place updates. For this reason, it is required to continuously renew the mapping information between a logical page address and its new physical address, invalidating its old physical address. When the invalidated pages swallow most of free space in flash storage, the actions of garbage reclamation are needed. Since the actions of garbage reclamation are very costly, it is crucial to reduce the number of update operations for the use of flash storage in enterprise-scale database systems. In this light, we propose a new buffering scheme that evicts dirty pages without writing them to storage, thereby reducing the amount of update operations considerably. That is, our buffering scheme enables the flushing-less evictions of dirty pages. To correctly read a page undergoing its flushing-less eviction, we propose a new on-the-fly redo mechanism that enables restoring the lost updates of the page in normal database processing. For fast execution of the on-the-fly redo, we maintain memory-resident log data of a reasonable size. To show the performance advantages of the proposed scheme, we performed extensive experiments based on the TPC-C benchmark, by running them on the open-sourced Berkeley DB equipped with/without our scheme. The results show that our scheme yields a much better performance by reducing the amount of page updates significantly.
Keywords: flash storage, buffering scheme, database system, recovery 
@article{CSIS_2017_14_2_a5,
     author = {Kyosung Jeong and Sungchae Lim and Kichun Lee and Sang-Wook Kim},
     title = {A {Flash-Aware} {Buffering} {Scheme} with the {On-the-Fly} {Redo} for {Efficient} {Data} {Management} in {Flash} {Storage}},
     journal = {Computer Science and Information Systems},
     publisher = {mathdoc},
     volume = {14},
     number = {2},
     year = {2017},
     url = {http://geodesic.mathdoc.fr/item/CSIS_2017_14_2_a5/}
}
TY  - JOUR
AU  - Kyosung Jeong
AU  - Sungchae Lim
AU  - Kichun Lee
AU  - Sang-Wook Kim
TI  - A Flash-Aware Buffering Scheme with the On-the-Fly Redo for Efficient Data Management in Flash Storage
JO  - Computer Science and Information Systems
PY  - 2017
VL  - 14
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CSIS_2017_14_2_a5/
ID  - CSIS_2017_14_2_a5
ER  - 
%0 Journal Article
%A Kyosung Jeong
%A Sungchae Lim
%A Kichun Lee
%A Sang-Wook Kim
%T A Flash-Aware Buffering Scheme with the On-the-Fly Redo for Efficient Data Management in Flash Storage
%J Computer Science and Information Systems
%D 2017
%V 14
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CSIS_2017_14_2_a5/
%F CSIS_2017_14_2_a5
Kyosung Jeong; Sungchae Lim; Kichun Lee; Sang-Wook Kim. A Flash-Aware Buffering Scheme with the On-the-Fly Redo for Efficient Data Management in Flash Storage. Computer Science and Information Systems, Tome 14 (2017) no. 2. http://geodesic.mathdoc.fr/item/CSIS_2017_14_2_a5/