P56: ZoneTier: A Zone-Based Storage Tiering and Caching
Co-Design to Integrate SSDs with Host-Aware SMR Drives
SessionPoster Reception
Authors
Event Type
ACM Student Research Competition
Poster
Reception
TimeTuesday, November 14th5:15pm -
7pm
LocationFour Seasons Ballroom
DescriptionIntegrating solid state drives (SSDs) and host-aware
shingled magnetic recording (HA-SMR) drives can
potentially build a cost-effective high-performance
storage system. However, existing SSD tiering and
caching designs in such a hybrid system are not fully
matched with the intrinsic properties of HA-SMR drives
due to their handling of non-sequential writes (NSWs)
from both workloads and data migration. We propose
ZoneTier, a zone-based storage tiering and caching
co-design, to effectively control all the NSWs by
leveraging the host-aware property of HA-SMR drives.
ZoneTier exploits the real-time data layouts of HA-SMR
zones to optimize zone placements, reshape NSWs
generated from zone demotions to HA-SMR drive preferred
sequential writes, and transforms the inevitable NSWs to
HA-SMR zones to cleaning-friendly write traffics. Our
experiments show that ZoneTier can utilize SSDs with
high efficiency, minimize relocation overhead, shorten
performance recovery time of HA-SMR drives, and finally
accomplish better system performance than existing
hybrid storage designs.
