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\documentclass[12pt, handout]{beamer}
\input{style/style.tex}
\begin{document}
\frame{\titlepage}
\begin{frame}\frametitle{Motivation}
\begin{tcolorbox}[title=Context]
Heterogeneous datacenter architectures are common ~\cite{DBLP:conf/date/MilojicicFDR21} and
modern computational needs of AI drive managers to diversify datacenters even more~\cite{DBLP:journals/computer/AthavaleBBMMPS24}.
In result datacenters become extremely complex and hard to operate with millions of CPU's, GPU's etc.
\end{tcolorbox}
\begin{center}
\includegraphics[width=\linewidth]{images/datacenter_complexity.pdf}
\end{center}
\tiny
\textbf{Figure 1.1:} Society depends on datacenters to keep running, and therefore we cannot afford to let these systems break down or experience significant performance-related issues.
With millions of servers in the largest datacenters, real-time management becomes very difficult.
Left to right: a Google datacenter, server racks, Ada Lovelace AD102 GPU architecture.
\end{frame}
\begin{frame}\frametitle{Problem Statement}
\begin{tcolorbox}[title=We need tools to tackle datacenter complexity]
We need Datacenter Digital Twins (DCDT) to be better able to detect and solve issues in this critical infrastructure~\cite{DBLP:journals/computer/AthavaleBBMMPS24}.
However, DCDT's are still actively developed, and lack crucial features \emph{e.g.,} predictive analytics~\cite{DBLP:usdoe/report/AP26894} to prevent unexpected job failures.
\end{tcolorbox}
\end{frame}
\begin{frame}\frametitle{Research Questions}
\begin{tcolorbox}[title=Main Research Question, colbacktitle=red!70!black,colback=red!20!white]
How to enable predictive analytics for datacenters through digital twinning?
\end{tcolorbox}
\begin{tcolorbox}[title=Research Question 1]
How to asses the current state-of-the-art of digital twinning for datacenters?
\end{tcolorbox}
\begin{tcolorbox}[title=Research Question 2]
How to design a datacenter digital twin reference architecture using discrete-event simulation and predictive data analytics?
\end{tcolorbox}
\begin{tcolorbox}[title=Research Question 3]
How to evaluate and validate a datacenter digital twin architecture in relation to system requirements?
\end{tcolorbox}
\end{frame}
\begin{frame}\frametitle{\textbf{RQ1}: System Model}
\end{frame}
\begin{frame}\frametitle{\textbf{RQ2}: Reference Architecture}
\end{frame}
\begin{frame}\frametitle{\textbf{RQ3}: Experimental Results I}
\end{frame}
\begin{frame}\frametitle{\textbf{RQ3}: Experimental Results II}
\end{frame}
\begin{frame}\frametitle{Discussion}
\end{frame}
\setcounter{framenumber}{4}
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\begin{frame}[allowframebreaks]\frametitle{Extra Slides: References}
\tiny
\bibliographystyle{is-plain}
\bibliography{main.bib}
\end{frame}
\begin{frame}\frametitle{Extra Slides: Societal Impact}
\begin{tcolorbox}[title=Why is this research important today?]
Over 3 million jobs in the Netherlands directly depend on cloud services, which are hosted in datacenters~\cite{DBLP:journals/corr/IosupKLVG22}.
Already the rapid
expansion of datacenters has increased the presence of service failures across all cloud
services~\cite{DBLP:conf/acsos/TalluriOVTI21}.
We need to act now.
\end{tcolorbox}
\begin{center}
\includegraphics[height=10em]{images/IosupLVG22-2_cropped.pdf}
\end{center}
\tiny
\textbf{Figure E.1:} Horizontally: the most important research areas in computer science in Netherlands.
Vertically: qualities we should ensure across all research areas with the most outstanding impact on society.
Datacenter manageability is a top-priority~\cite{DBLP:journals/corr/IosupKLVG22}.
\end{frame}
\begin{frame}\frametitle{Extra Slides: Why Digital Twinning?}
\begin{tcolorbox}[title=Definition]
A DCDT mirrors the structure, context and behaviour of a datacenter~\cite{DBLP:journals/computer/AthavaleBBMMPS24}. The prerequisite to any digital twin is good monitoring and sensing capabilities in the physical entity.
Datacenters meet this requirement easily because they already connect hundreds of monitoring sensors. \end{tcolorbox}
\begin{center}
\includegraphics[height=10em]{images/TaoIEEE2019-3_cropped.pdf}
\end{center}
\tiny
\textbf{Figure E.2:} Due to insufficient technological foundations,
little work is available on DTs between 2003 and 2018, and it is only with the rapid growth
of cloud computing, Internet-of-Things and Big Data analytics that DTs have reemerged~\cite{DBLP:conf/cirp/TAO2018169}.
That is why nobody used digital twins to mirror datacenters earlier.
\end{frame}
\begin{frame}\frametitle{Extra Slides: Why not pure simulation?}
\begin{tcolorbox}[title=Predicting job failures]
Preventing failure-caused outages in advance
can reduce huge operational costs, as over 20\% of all reported outages amount to more than 1 million
US\$~\cite{DBLP:report/AnnualOutageAnalysis2025}.
Only a constant bi-directional interaction (digital twin $\iff$ physical entity) can achieve this.
\end{tcolorbox}
\begin{center}
\includegraphics[height=10em]{images/AthavaleBBMMPS24-3_cropped.pdf}
\end{center}
\tiny \textbf{Figure E.3:} Real-time control that is tightly-coupled with the IT equipment is a prerequisite for timely predictions within seconds/minutes~\cite{DBLP:journals/computer/AthavaleBBMMPS24}.
\end{frame}
% Computational Fluid Dynamics (CFD) have high computation overhead, unsuitable for real-time simulation of a dynamic datacenter.
%Moreover oftentimes a poorly configured CFD model can lead to high error rates~\cite{DBLP:conf/sensys/WangZD0TCWZ20}.
%Data-driven Machine Learning performs poorly by the cases not covered in the training data.
\end{document}
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