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talk.pdf: talk.tex assets/consistent_hashing_1.pdf assets/consistent_hashing_2.pdf assets/consistent_hashing_3.pdf assets/consistent_hashing_4.pdf assets/garage_tables.pdf
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\title{Introducing Garage}
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\subtitle{a new storage platform for self-hosted geo-distributed clusters}
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\author{Deuxfleurs Association}
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\date{IMT Atlantique, 2022-06-23}
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{\large\bf Deuxfleurs Association}
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\vspace{1em}
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\url{https://garagehq.deuxfleurs.fr/}
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Matrix channel: \texttt{\#garage:deuxfleurs.fr}
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\textbf{Promote self-hosting and small-scale hosting\\
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as an alternative to large cloud providers}
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Why is it hard?
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}
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\vspace{2em}
|
||||
\begin{center}
|
||||
\textbf{\underline{Resilience}}\\
|
||||
{\footnotesize (we want good uptime/availability with low supervision)}
|
||||
\end{center}
|
||||
}
|
||||
\end{frame}
|
||||
|
||||
\begin{frame}
|
||||
\frametitle{How to be resilient (the hard way)}
|
||||
|
||||
Entreprise-grade systems typically employ:
|
||||
\vspace{1em}
|
||||
\begin{itemize}
|
||||
\item RAID
|
||||
\item Redundant power grid + UPS
|
||||
\item Redundant Internet connections
|
||||
\item Low-latency links
|
||||
\item ...
|
||||
\end{itemize}
|
||||
\vspace{1em}
|
||||
$\to$ it's costly and only worth it at DC scale
|
||||
\end{frame}
|
||||
|
||||
\begin{frame}
|
||||
\frametitle{How to be resilient (the \underline{\textbf{cheap}} way)}
|
||||
|
||||
\only<1,4-5>{
|
||||
Instead, we use:
|
||||
\vspace{1em}
|
||||
\begin{itemize}
|
||||
\item \textcolor<2->{gray}{Commodity hardware (e.g. old desktop PCs)}
|
||||
\vspace{.5em}
|
||||
\item<4-> \textcolor<5->{gray}{Commodity Internet (e.g. FTTB, FTTH) and power grid}
|
||||
\vspace{.5em}
|
||||
\item<5-> \textcolor<6->{gray}{\textbf{Geographical redundancy} (multi-site replication)}
|
||||
\end{itemize}
|
||||
}
|
||||
\only<2>{
|
||||
\begin{center}
|
||||
\includegraphics[width=.8\linewidth]{assets/atuin.jpg}
|
||||
\end{center}
|
||||
}
|
||||
\only<3>{
|
||||
\begin{center}
|
||||
\includegraphics[width=.8\linewidth]{assets/neptune.jpg}
|
||||
\end{center}
|
||||
}
|
||||
\only<6>{
|
||||
\begin{center}
|
||||
\includegraphics[width=.5\linewidth]{assets/inframap.jpg}
|
||||
\end{center}
|
||||
}
|
||||
\end{frame}
|
||||
|
||||
\begin{frame}
|
||||
\frametitle{How to make this happen}
|
||||
\begin{center}
|
||||
\only<1>{\includegraphics[width=.8\linewidth]{assets/slide1.png}}%
|
||||
\only<2>{\includegraphics[width=.8\linewidth]{assets/slide2.png}}%
|
||||
\only<3>{\includegraphics[width=.8\linewidth]{assets/slide3.png}}%
|
||||
\end{center}
|
||||
\end{frame}
|
||||
|
||||
\begin{frame}
|
||||
\frametitle{Distributed file systems are slow}
|
||||
File systems are complex, for example:
|
||||
\vspace{1em}
|
||||
\begin{itemize}
|
||||
\item Concurrent modification by several processes
|
||||
\vspace{1em}
|
||||
\item Folder hierarchies
|
||||
\vspace{1em}
|
||||
\item Other requirements of the POSIX spec
|
||||
\end{itemize}
|
||||
\vspace{1em}
|
||||
Coordination in a distributed system is costly
|
||||
|
||||
\vspace{1em}
|
||||
Costs explode with commodity hardware / Internet connections\\
|
||||
{\small (we experienced this!)}
|
||||
\end{frame}
|
||||
|
||||
\begin{frame}
|
||||
\frametitle{A simpler solution: object storage}
|
||||
Only two operations:
|
||||
\vspace{1em}
|
||||
\begin{itemize}
|
||||
\item Put an object at a key
|
||||
\vspace{1em}
|
||||
\item Retrieve an object from its key
|
||||
\end{itemize}
|
||||
\vspace{1em}
|
||||
{\footnotesize (and a few others)}
|
||||
|
||||
\vspace{1em}
|
||||
Sufficient for many applications!
|
||||
\end{frame}
|
||||
|
||||
\begin{frame}
|
||||
\frametitle{A simpler solution: object storage}
|
||||
\begin{center}
|
||||
\includegraphics[width=.2\linewidth]{../2020-12-02_wide-team/img/Amazon-S3.jpg}
|
||||
\hspace{5em}
|
||||
\includegraphics[width=.2\linewidth]{assets/minio.png}
|
||||
\end{center}
|
||||
\vspace{1em}
|
||||
S3: a de-facto standard, many compatible applications
|
||||
|
||||
\vspace{1em}
|
||||
|
||||
MinIO is self-hostable but not suited for geo-distributed deployments
|
||||
\end{frame}
|
||||
|
||||
|
||||
\begin{frame}
|
||||
\frametitle{But what is Garage, exactly?}
|
||||
\textbf{Garage is a self-hosted drop-in replacement for the Amazon S3 object store}\\
|
||||
\vspace{.5em}
|
||||
that implements resilience through geographical redundancy on commodity hardware
|
||||
\begin{center}
|
||||
\includegraphics[width=.8\linewidth]{assets/garageuses.png}
|
||||
\end{center}
|
||||
\end{frame}
|
||||
|
||||
\begin{frame}
|
||||
\frametitle{What makes Garage different?}
|
||||
\textbf{Coordination-free:}
|
||||
\vspace{2em}
|
||||
\begin{itemize}
|
||||
\item No Raft or Paxos
|
||||
\vspace{1em}
|
||||
\item Internal data types are CRDTs
|
||||
\vspace{1em}
|
||||
\item All nodes are equivalent (no master/leader/index node)
|
||||
\end{itemize}
|
||||
\vspace{2em}
|
||||
$\to$ less sensitive to higher latencies between nodes
|
||||
\end{frame}
|
||||
|
||||
\begin{frame}
|
||||
\frametitle{Storing and retrieving files}
|
||||
\begin{center}
|
||||
\only<1>{\includegraphics[width=.5\linewidth]{assets/garage2a.drawio.pdf}}%
|
||||
\only<2>{\includegraphics[width=.5\linewidth]{assets/garage2b.drawio.pdf}}%
|
||||
\end{center}
|
||||
\end{frame}
|
||||
|
||||
\begin{frame}
|
||||
\frametitle{What makes Garage different?}
|
||||
\begin{center}
|
||||
\includegraphics[width=.9\linewidth]{assets/endpoint-latency-dc.png}
|
||||
\end{center}
|
||||
\end{frame}
|
||||
|
||||
\begin{frame}
|
||||
\frametitle{What makes Garage different?}
|
||||
\textbf{Consistency model:}
|
||||
\vspace{2em}
|
||||
\begin{itemize}
|
||||
\item Not ACID (not required by S3 spec) / not linearizable
|
||||
\vspace{1em}
|
||||
\item \textbf{Read-after-write consistency}\\
|
||||
{\footnotesize (stronger than eventual consistency)}
|
||||
\end{itemize}
|
||||
\end{frame}
|
||||
|
||||
\begin{frame}
|
||||
\frametitle{What makes Garage different?}
|
||||
\textbf{Location-aware:}
|
||||
\vspace{2em}
|
||||
\begin{center}
|
||||
\includegraphics[width=\linewidth]{assets/location-aware.png}
|
||||
\end{center}
|
||||
\vspace{2em}
|
||||
Garage replicates data on different zones when possible
|
||||
\end{frame}
|
||||
|
||||
\begin{frame}
|
||||
\frametitle{What makes Garage different?}
|
||||
\begin{center}
|
||||
\includegraphics[width=.8\linewidth]{assets/map.png}
|
||||
\end{center}
|
||||
\end{frame}
|
||||
|
||||
|
||||
\begin{frame}
|
||||
\frametitle{Garage's architecture}
|
||||
\begin{center}
|
||||
\includegraphics[width=.5\linewidth]{assets/garage.drawio.pdf}
|
||||
\end{center}
|
||||
\end{frame}
|
||||
|
||||
\begin{frame}
|
||||
\frametitle{Consistent Hashing (DynamoDB)}
|
||||
\textbf{How to spred files over different cluster nodes?}
|
||||
\vspace{1em}
|
||||
|
||||
\centering
|
||||
|
||||
\only<1>{\includegraphics[width=.55\columnwidth]{assets/consistent_hashing_1.pdf}}%
|
||||
\only<2>{\includegraphics[width=.55\columnwidth]{assets/consistent_hashing_2.pdf}}%
|
||||
\only<3>{\includegraphics[width=.55\columnwidth]{assets/consistent_hashing_3.pdf}}%
|
||||
\only<4>{\includegraphics[width=.55\columnwidth]{assets/consistent_hashing_4.pdf}}%
|
||||
\end{frame}
|
||||
|
||||
\begin{frame}
|
||||
\frametitle{Garage data structures: 3 levels of consistent hashing}
|
||||
\centering
|
||||
\includegraphics[width=.85\columnwidth]{assets/garage_tables.pdf}
|
||||
\end{frame}
|
||||
|
||||
\begin{frame}
|
||||
\frametitle{An ever-increasing compatibility list}
|
||||
\begin{center}
|
||||
\includegraphics[width=.7\linewidth]{assets/compatibility.png}
|
||||
\end{center}
|
||||
\end{frame}
|
||||
|
||||
\begin{frame}
|
||||
\frametitle{Get Garage now!}
|
||||
\begin{center}
|
||||
\includegraphics[width=.3\linewidth]{../../logo/garage_hires.png}\\
|
||||
\vspace{-1em}
|
||||
\url{https://garagehq.deuxfleurs.fr/}\\
|
||||
Matrix channel: \texttt{\#garage:deuxfleurs.fr}
|
||||
|
||||
\vspace{2em}
|
||||
\includegraphics[width=.09\linewidth]{assets/rust_logo.png}
|
||||
\includegraphics[width=.2\linewidth]{assets/AGPLv3_Logo.png}
|
||||
\end{center}
|
||||
\end{frame}
|
||||
|
||||
\begin{frame}
|
||||
\frametitle{Demo time!}
|
||||
\end{frame}
|
||||
|
||||
\end{document}
|
||||
|
||||
%% vim: set ts=4 sw=4 tw=0 noet spelllang=fr :
|
||||
Loading…
Reference in New Issue