A New NVM Device Driver for IoT Time Series Database

Abstract

Numerous IoT devices in IoT systems collect data concurrently, which brings great challenges to IoT time series databases to store and manage these data. NVM device has high read–write speed compared with HDD and Flash-based SSD, and it is a possible way to solve the storage bottleneck. However, there are some limitations that should be solved such as the overhead of the I/O software stack for NVM devices and the lack of optimization for IoT time series databases in a Linux environment. By analyzing the characteristics of IoT time series databases and NVM devices, we optimized the device driver of NVM in Linux and provide a new structure of a NVM device driver for IoT time series databases. A multi-queue management strategy and a lightweight load balance mechanism based on frequency were designed to improve the concurrency and efficiency of NVM device drivers. The prototype of an IoT-oriented NVM device driver named TS-PMEM was implemented based on an open-source NVM device driver. Six prototypes were used for evaluation with YCSB-TS, a test tool for time series databases. Results showed that TS-PMEM can improve write throughput of the time series databases by 18.6%, query throughput by 10.6%, and reduce the write latency by 8.3% and query latency by 6.4%.

Hybrid Optical and Thermal Energy Conversion System to Power Internet of Things Nodes

“…This has led to the development of the Internet of Things (IoT). The IoT encompasses various aspects, including device identification [1][2][3], data acquisition [4], communication methods and network topology [5,6], database creation [7,8], data visualization, and user interface development [9]. Wireless sensor networks are a part of the IoT, and the nodes in these networks must have small dimensions, low power consumption (typically, in the range of µW/mW), and long operational lifetimes without requiring human intervention.…”