A Case for Heterogeneous Flash

نویسندگان

  • Di Wang
  • Anand Sivasubramaniam
  • Bhuvan Urgaonkar
چکیده

We explore the idea of heterogeneous NAND flash which possesses pages/blocks of multiple sizes. This heterogeneity can then be exploited to accommodate the diversity in data access patterns found in most storage workloads. We identify various tradeoffs offered by such pages/blocks. By characterizing seven real-world I/O traces, we identify metrics that have a bearing on the efficacy as well as design of such a heterogeneous flash. We use the implications of our workload characterization to discuss the pros and cons of different implementation styles and management schemes.

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تاریخ انتشار 2011