上海科技大学知识管理系统

We present RBC (Request Bandwidth Controller for LSM-tree), a controller that manages LSM-tree read and write operations and optimizes the requests for flash-based storage devices. RBC minimizes the number of write-stalls and reduces tail latency by precisely measuring the requests for solid-state disk bandwidth from various components within the LSM-tree. We have successfully implemented RBC on the state-of-the-art LSM-tree storage system, RocksDB. The experimental results show that using YSCB to evaluate RBC leads to a significant decrease in write-stalls and tail latency. Additionally, RBC provides higher write throughput (up to 1.52x) and high read throughput (up to 1.96x), while reducing read and write amplification by 55% and 37%, respectively. Furthermore, we observed a reduction of approximately 50% in tail latency with the use of RBC. © 2023 Association for Computing Machinery. All rights reserved.