Design tradeoffs for SSD performance
ATC'08 USENIX 2008 Annual Technical Conference on Annual Technical Conference
Operating System Concepts
Gordon: using flash memory to build fast, power-efficient clusters for data-intensive applications
Proceedings of the 14th international conference on Architectural support for programming languages and operating systems
Disk schedulers for solid state drivers
EMSOFT '09 Proceedings of the seventh ACM international conference on Embedded software
Linux Kernel Development
Parameter-Aware I/O Management for Solid State Disks (SSDs)
IEEE Transactions on Computers
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NAND flash based Solid State Drives (SSDs) have several unique physical characteristics. Since the SSD consists of many NAND flash packages and each package is able to perform its own I/O operation, almost SSDs provide some parallel I/O operations to improve the I/O performance. Unlike hard disks, SSDs do not have data access overhead such as seek time and rotational delay as well as two operations of read and write have asymmetric performances. In this paper, we propose some techniques that could improve the I/O performance by exploiting the characteristics of SSDs. To this end, we first extract the performance parameters in SSDs such as read/write unit and erase unit. And then, the extracted performance parameters are used to configure the file system block size and I/O request size. We also present an efficient I/O scheduling scheme that fully exploits the characteristics of solid state drives: no data access overhead and asymmetric read and write performance. Through implementation on Linux operating systems, we show that the proposed schemes significantly improve the performance of I/O subsystems for solid state drives.