Speaker: Thu Le-Anh
November 28, 2025 | 11:00 am
DEIB - NECSTLab Meeting Room (Bld. 20)
Online by Zoom
Contact: Prof. Marco Santambrogio
Abstract
On Friday, November 28, 2025, we will have a new talk for the series #NECSTFridayTalk.During this talk, we will have, as speaker, Thu Le-Anh, PhD at Tsukuba University.
The rapid expansion of cloud computing driven by artificial intelligence and machine learning (AI/ML) applications has led to increasing workloads and energy demands in data centers. Designing efficient and sustainable systems requires accurate modeling and performance analysis, yet this remains challenging due to highly variable workloads and complex server interactions.
Queueing models offer an effective framework for analyzing data center operations and evaluating key performance metrics, including response time, utilization, and energy consumption. In particular, queueing models with setup policies, where idle servers are turned off and reactivated upon the arrival of new jobs, are widely used to reduce power consumption without significantly degrading performance. These policies are particularly relevant for modern data centers that employ dynamic power-saving strategies during periods of low load.
Our study investigates queueing models with setup policies by fitting interarrival times obtained from Google cluster traces. We address a common limitation of existing queueing models, which typically assume Poisson arrivals (i.e., exponentially distributed interarrival times) for analytical tractability. By capturing realistic workload dynamics and integrating them into analytical models, the proposed approach enables a more accurate evaluation of the setup policies, providing practical insights into balancing energy efficiency in large-scale data centers.
The NECSTLab is a DEIB laboratory, with different research lines on advanced topics in computing systems: from architectural characteristics, to hardware-software codesign methodologies, to security and dependability issues of complex system architectures.
Every week, the “NECSTFridayTalk” invites researchers, professionals or entrepreneurs to share their work experiences and projects they are implementing in the “Computing Systems”.