Name
Title | ||
|---|---|---|
ROCO: Using a Solid State Drive Cache to Improve the Performance of a Host-Aware Shingled Magnetic Recording Drive. |
Abstract | ||
|---|---|---|
Shingled magnetic recording (SMR) can effectively increase the capacity of hard disk drives (HDDs). Hostaware SMR (HA-SMR) is expected to be more popular than other SMR models because of its backward compatibility and new SMR-specific APIs. However, an HA-SMR drive often suffers performance degradation under write-intensive workloads because of frequent non-sequential writes buffered in the disk cache. The non-sequential writes mainly come from update writes, small random writes and out-of-order writes. In this paper, we propose a hybrid storage system called ROCO which aims to use a solid state drive (SSD) cache to improve the performance of an HA-SMR drive. ROCO reorders out-of-order writes belonging to the same zone and uses the SSD cache to absorb update writes and small random writes. We also design a data replacement algorithm called CREA for the SSD cache. CREA first conducts zone-oriented hot/cold data identification to identify cold-cached zones and hot-cached zones, and then evicts data blocks belonging to colder zones with higher priorities that can be sequentially written or written through host-side read-modify-write operations. It gives the lowest priority to data blocks belonging to the hottest-cached zone that have to be non-sequentially written. Experimental results show that ROCO can effectively reduce non-sequential writes to the HA-SMR drive and improve the performance of the HA-SMR drive. |
Year | DOI | Venue |
|---|---|---|
2019 | 10.1007/s11390-019-1899-7 | J. Comput. Sci. Technol. |
Keywords | Field | DocType |
solid state drive (SSD) cache, host-aware shingled magnetic recording (HA-SMR) drive, zone-oriented block reordering, zone-oriented hot/cold data identification, data replacement algorithm | Disk buffer,Cache,Computer science,Shingled magnetic recording,Hybrid storage system,Solid-state drive,Operating system,Backward compatibility,Distributed computing | Journal |
Volume | Issue | ISSN |
34 | 1 | 1860-4749 |
Citations | PageRank | References |
2 | 0.39 | 14 |
Authors | ||
4 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Wenguo Liu | 1 | 250 | 16.45 |
| Lingfang Zeng | 2 | 365 | 33.99 |
| Dan Feng | 3 | 1845 | 188.16 |
| Kenneth B. Kent | 4 | 458 | 54.42 |