TY - JOUR
T1 - On Improving the Write Responsiveness for Host-Aware SMR Drives
AU - Yang, Ming-Chang
AU - Chang, Yuan-Hao
AU - Wu, Fenggang
AU - Kuo, Tei-Wei
AU - Du, David H. C.
PY - 2019/1/1
Y1 - 2019/1/1
N2 - This paper presents a Virtual Persistent Cache design to remedy the long latency behavior and to ultimately improve the write responsiveness of the Host-Aware Shingled Magnetic Recording (HA-SMR) drives. 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 percent, under the evaluated workloads.
AB - This paper presents a Virtual Persistent Cache design to remedy the long latency behavior and to ultimately improve the write responsiveness of the Host-Aware Shingled Magnetic Recording (HA-SMR) drives. 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 percent, under the evaluated workloads.
KW - Host-aware
KW - long latency behavior
KW - persistent cache
KW - shingled magnetic recording (SMR)
UR - http://www.scopus.com/inward/record.url?scp=85048599033&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85048599033&origin=recordpage
U2 - 10.1109/TC.2018.2845383
DO - 10.1109/TC.2018.2845383
M3 - RGC 21 - Publication in refereed journal
SN - 0018-9340
VL - 68
SP - 111
EP - 124
JO - IEEE Transactions on Computers
JF - IEEE Transactions on Computers
IS - 1
M1 - 8387485
ER -