Paper Info
Title
NoFTL for Real: Databases on Real Native Flash Storage.
Abstract
Flash SSDs are omnipresent as database storage. HDD replacement is seamless since Flash SSDs implement the same legacy hardware and software interfaces to enable backward compatibility. Yet, the price paid is high as backward compatibility masks the native behaviour, incurs significant complexity and decreases I/O performance, making it non-robust and unpredictable. Flash SSDs are black-boxes. Although DBMS have ample mechanisms to control hardware directly and utilize the performance potential of Flash memory, the legacy interfaces and black-box architecture of Flash devices prevent them from doing so. In this paper we demonstrate NoFTL, an approach that enables native Flash access and integrates parts of the Flashmanagement functionality into the DBMS yielding significant performance increase and simplification of the I/O stack. NoFTL is implemented on real hardware based on the OpenSSD research platform. The contributions of this paper include: (i) a description of the NoFTL native Flash storage architecture; (ii) its integration in Shore-MT and (iii) performance evaluation of NoFTL on a real Flash SSD and on an on-line data-driven Flash emulator under TPCB,C,E and H workloads. The performance evaluation results indicate an improvement of at least 2.4x on real hardware over conventional Flash storage; as well as better utilisation of native Flash parallelism.
Year
Venue
Field
2015
EDBT
Flash file system,Flash memory,Flash memory emulator,Computer science,Software,Database storage structures,Flash storage,Database,Operating system,Legacy system,Backward compatibility
DocType
Citations 
PageRank 
Conference
2
0.43
References 
Authors
9
4
Name
Order
Citations
PageRank
Sergey Hardock183.56
Ilia Petrov28320.20
Robert Gottstein3396.76
Alejandro P. Buchmann41779432.90