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@@ -50,16 +50,55 @@ Based on the identified stakeholders we list 6 potential use-cases for a predict
Congestion management and traffic routing can effectively benefit from digital twinning.
Detecting bottlenecks, adjusting datacenter protocols and calibrating switches and interconnects is already a important use-case for \gls{dcdt}~\cite{DBLP:conf/sigcomm/HongWDSSHZY21}.
\item \textbf{Virtual Prototyping} \\
-
+ Digital twinning can be used to provide insight into the system before changes are made.
+ Using a \gls{dcdt}, the operators can change, model and shape the datacenter to estimate their effect.
+ Virtual prototyping encompasses interacting with an existing datacenter model, or with a proof-of-concept, not yet constructed warehouse.
\item \textbf{Monitoring and Visualization} \\
+ 3D visualizations and dashboards are of the utmost importance to all stakeholders, due to the insights they provide.
+ With real-time data ingestion and the two-way feedback loop, \gls{dcdt}s can empower descriptive analytics.
+ This use-case already shapes many existing systems (see \Cref{tab:dt_features_comparison}).
\end{enumerate}
\subsection{Functional Requirements}\label{sss:functional_requirements}
+Based on a subset of the above use-cases, we formulate the functional and non-functional requirements for \mysystem:
\begin{enumerate}[label=\textbf{FR\arabic* --},align=left]
- \item \textbf{Datacenter} \\
+ \item \textbf{The system should be able to handle workloads of arbitrary size.} \\
+ Existing systems range from Cloud through the Edge to HPC digital twins.
+ Therefore, \mysystem must support workloads similar in length and type to the commercial setting.
+ Without \textbf{FR1}, \mysystem will be incomplete, and like the majority of the \Cref{tab:dt_features_comparison} systems, its use-case will be niche.
+ \textbf{FR1} is necessary to avoid overly-specializing the \gls{dcdt}.
+ \item \textbf{The system should support failure detection.}\\
+ Failures are of crucial concern to datacenter operators.
+ The system detect and report failures to datacenter operators.
+ Without \textbf{FR2}, the system will not be able to help datacenter operators meet \gls{sla}s.
+ Including \textbf{FR2} is necessary to ensure that failures, which which can cause financial penalties, are detected in a timely manner so as to meet the different \gls{sla}s.
+ \item \textbf{The system should be capable of long-term and short-term data storage.}\\
+ \textbf{FR3} is necessary for \textbf{FR4} and \textbf{FR5}.
+ Without \textbf{FR3}, the system cannot support \gls{oda} techniques.
+ A system cannot be considered a \gls{dt} without insights stemming from accurate data analytics~\cite{DBLP:usdoe/report/AP26894}.
+ \gls{nasem} digital twin definition requires both real-time insights, and guidance based on historical-patterns.
+ Therefore, it is imperative to ensure \textbf{FR3}.
+ \item \textbf{The system should support real-time descriptive data analytics.}\\
+ There are many types of data analytics present is existing deployments~\cite{DBLP:conf/wosp/SumanCNTMI24}.
+ In order to scope down the project, we only select several use-cases for \gls{my_system}.
+ Out of the 4 prime analytics type, we find in the literature survey the predictive analytics to be the most urgently needed, and descriptive analytics to be the most prevailing type of data processing.
+ Therefore, in order to achieve performance on par with previous systems, and to ensure our system meets the official \gls{nasem} definition, \textbf{FR4} is needed.
+ \item \textbf{The system should enable predictive data analytics.}\\
+ The system should help future researchers incorporate predictive data analytics engines, regardless of the statistical modelling technique.
+ This is our novel contribution to the scientific field of \gls{dcdt}s.
+ Without \textbf{FR5}, we miss the aim of our entire project.
+ \item \textbf{The system should be able to process arbitrary amounts of telemetry.}\\
+ The size of the \gls{ai} economy is expected to grow~\cite{DBLP:journals/computer/AthavaleBBMMPS24}.
+ As a result, both current and future datacenters will generate huge amount of data.
+ Our system must be capable of ingesting and processing different metrics regardless of the volume of incoming messages.
+ Without \textbf{FR6}, we hinder the adoption of \mysystem in modern and future datacenters.
+ \item \textbf{The model should be capable of clear data visualization.}
+ The system must have a user-friendly, visual interface for data analytics, and support them in real-time.
+ Without \textbf{FR7}, we exclude important stakeholders such as customers and users from the potential benefactors of our system.
\end{enumerate}
\subsection{Non-functional Requirements}\label{sss:non_functional_requirements}
+In addition to the functional requirements, we also present non-functional requirements for \mysystem:
\begin{enumerate}[label=\textbf{NFR\arabic* --},align=left]
\item \textbf{Datacenter} \\
\end{enumerate}
@@ -67,7 +106,7 @@ Based on the identified stakeholders we list 6 potential use-cases for a predict
\section{Design of \emph{Sunfish}}\label{ss:design_of_mysystem}
\begin{figure}[t]
- \includegraphics[width=\linewidth]{images/ref_architecture.pdf}
+ \includegraphics[width=\linewidth]{images/ref_architecture.png}
\caption{ The predictive datacenter digital twin reference architecture.
We call the system \emph{Sunfish}.
The architecture was designed with the \emph{AtLarge Design Process}~\cite{DBLP:conf/icdcs/IosupVTETBFMT19} over several iterations in the past months}
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