Name
Abstract | ||
|---|---|---|
Modern NAND Flash memory-based Solid State Drive (SSD) is designed to support high bandwidth for I/O requests by exploiting various parallelism including multiple channels, multiple flash memory chips, and multiple planes. However, SSD system is utilized not only for general I/O requests but is also used during flash memory management processes (e.g., garbage collection). In particular, the sharing of system resources (e.g., system bus, DRAM) for I/O requests and garbage collection can cause performance degradation. In this letter, we address the system bus bottleneck and propose
<italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><b>Decoupled</b></i>
SSD system that decouples the front-end (i.e. cores, system bus) with the back-end (i.e., flash memory) and provide an on-chip network to interconnect the controllers together. Our decoupled SSD enables advanced command (i.e. copy-back) to be exploited for efficient garbage collection; in particular, we propose to extend copy-back commands to enable
<italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">global</i>
copy-back through the flash-controller interconnect to effectively decouple I/O path and garbage collection path. Our evaluations show that decoupled SSD results in up to 34.7% bandwidth improvement, for I/O traffic while achieving up to 69% speedup for garbage collection. |
Year | DOI | Venue |
|---|---|---|
2021 | 10.1109/LCA.2021.3118688 | IEEE Computer Architecture Letters |
Keywords | DocType | Volume |
Solid-state drive,flash memory,copy-back,interconnection networks | Journal | 20 |
Issue | ISSN | Citations |
2 | 1556-6056 | 1 |
PageRank | References | Authors |
0.36 | 0 | 3 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Jiho Kim | 1 | 57 | 15.00 |
| Myoungsoo Jung | 2 | 1 | 0.36 |
| john kim | 3 | 1412 | 72.87 |