LabStor: A Modular and Extensible Platform for Developing High-Performance, Customized I/O Stacks in Userspace
Event Type
Paper
Registration Categories
TP
Tags
Resource Management and Scheduling
System Software
Reproducibility Badges
TimeTuesday, 15 November 20222pm - 2:30pm CST
LocationC146
DescriptionTraditionally, I/O systems have been developed within the confines of a centralized OS kernel. This led to monolithic and rigid storage systems that are limited by low development speed, low expressiveness, and suboptimal performance. Various assumptions are forced onto users including reliance on the UNIX-file abstraction, the POSIX standard, and a narrow set of I/O policies. Recent hardware innovation and the explosion of I/O requirements of modern applications have questioned how storage services are developed. To support high-performance while maintaining flexibility, I/O subsystems are shifting to userspace designs. To that end, this paper introduces LabStor, a modular and extensible platform for developing high-performance, customized I/O stacks in userspace. By enabling direct access to device drivers from userspace, any number of composable I/O stack designs are now possible with high-velocity development. Evaluations show that I/O stacks developed in LabStor can yield performance improvements of up to 60% in various applications.
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