This paper presents a Virtual Persistent Cache design to remedy the long latency behavior of the Host-Aware Shingled Magnetic Recording (HA-SMR) drive. Our design keeps the cost-effective model of the existing HA-SMR drives, but at the same time asks the great help from the host system for adaptively providing some computing and management resources to improve the drive performance when needed. The technical contribution is to trick the HA-SMR drives by smartly reshaping the access patterns to HA-SMR drives, so as to avoid the occurrences of long latencies in most cases and thus to ultimately improve the drive performance and responsiveness. We conduct experiments on real Seagate 8 TB HA-SMR drives to demonstrate the advantages of Virtual Persistent Cache over the real workloads from Microsoft Research Cambridge. The results show that the proposed design can remedy most of the long latencies and improve the drive performance by at least 58.11%, under the evaluated workloads.
|Original language||English (US)|
|Title of host publication||2017 IEEE/ACM International Conference on Computer-Aided Design, ICCAD 2017|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|Number of pages||8|
|State||Published - Dec 13 2017|
|Event||36th IEEE/ACM International Conference on Computer-Aided Design, ICCAD 2017 - Irvine, United States|
Duration: Nov 13 2017 → Nov 16 2017
|Name||IEEE/ACM International Conference on Computer-Aided Design, Digest of Technical Papers, ICCAD|
|Other||36th IEEE/ACM International Conference on Computer-Aided Design, ICCAD 2017|
|Period||11/13/17 → 11/16/17|
Bibliographical notePublisher Copyright:
© 2017 IEEE.
Copyright 2018 Elsevier B.V., All rights reserved.
- Host-aware shingled magnetic recording (HA-SMR)
- Long latency behavior
- Persistent cache