ROSfs: A User-Level File System for ROS

TL;DR

ROSfs is a user-level file system for ROS that improves data query performance and collaboration in multi-robot systems by using a novel time index structure and sub-file grouping.

Contribution

It introduces a new user-level file system for ROS that enhances data query efficiency and supports multi-robot collaboration with real-world evaluation.

Findings

Up to 129x faster offline query performance.

Up to 7x reduction in online query latency.

Effective in real-world UAV and data server deployments.

Abstract

We present ROSfs, a novel user-level file system for the Robot Operating System (ROS). ROSfs interprets a robot file as a group of sub-files, with each having a distinct label. ROSfs applies a time index structure to enhance the flexible data query while the data file is under modification. It provides multi-robot systems (MRS) with prompt cross-robot data acquisition and collaboration. We implemented a ROSfs prototype and integrated it into a mainstream ROS platform. We then applied and evaluated ROSfs on real-world UAVs and data servers. Evaluation results show that compared with traditional ROS storage methods, ROSfs improves the offline query performance by up to 129x and reduces inter-robot online data query latency under a wireless network by up to 7x.