Themis: Finding Imbalance Failures in Distributed File Systems via a Load Variance Model
Yuanliang Chen, Fuchen Ma, Yuanhang Zhou, Zhen Yan, Qing Min Liao, Yu Jiang · 2025
A distributed file system (DFS) is a file system that spans across multiple file servers or multiple locations. The load balancing mechanism in a DFS is crucial, as it optimizes resource utilization across all nodes and improves response times. However, incorrect load scheduling or implementation errors in load balancing algorithms can lead to system imbalance, hang-ups, and even crashes. Such imbalance failures may be critical and pose a significant threat to the availability and security of distributed file systems.