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+*
+
+!assets
+
+!.gitignore
+!*.svg
+!*.png
+!*.jpg
+!*.tex
+!Makefile
+!.gitignore
+!assets/*.drawio.pdf
+
+!talk.pdf
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@@ -0,0 +1,5 @@
+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
+ pdflatex talk.tex
+
+assets/%.pdf: assets/%.svg
+ inkscape -D -z --file=$^ --export-pdf=$@
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diff --git a/doc/talks/2022-06-23-stack/talk.tex b/doc/talks/2022-06-23-stack/talk.tex
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+%\nonstopmode
+\documentclass[aspectratio=169]{beamer}
+\usepackage[utf8]{inputenc}
+% \usepackage[frenchb]{babel}
+\usepackage{amsmath}
+\usepackage{mathtools}
+\usepackage{breqn}
+\usepackage{multirow}
+\usetheme{boxes}
+\usepackage{graphicx}
+%\useoutertheme[footline=authortitle,subsection=false]{miniframes}
+
+\beamertemplatenavigationsymbolsempty
+
+\definecolor{TitleOrange}{RGB}{255,137,0}
+\setbeamercolor{title}{fg=TitleOrange}
+\setbeamercolor{frametitle}{fg=TitleOrange}
+
+\definecolor{ListOrange}{RGB}{255,145,5}
+\setbeamertemplate{itemize item}{\color{ListOrange}$\blacktriangleright$}
+
+\definecolor{verygrey}{RGB}{70,70,70}
+\setbeamercolor{normal text}{fg=verygrey}
+
+
+\usepackage{tabu}
+\usepackage{multicol}
+\usepackage{vwcol}
+\usepackage{stmaryrd}
+\usepackage{graphicx}
+
+\usepackage[normalem]{ulem}
+
+\title{Introducing Garage}
+\subtitle{a new storage platform for self-hosted geo-distributed clusters}
+\author{Deuxfleurs Association}
+\date{IMT Atlantique, 2022-06-23}
+
+\begin{document}
+
+\begin{frame}
+ \centering
+ \includegraphics[width=.3\linewidth]{../../sticker/Garage.pdf}
+ \vspace{1em}
+
+ {\large\bf Deuxfleurs Association}
+ \vspace{1em}
+
+ \url{https://garagehq.deuxfleurs.fr/}
+
+ Matrix channel: \texttt{\#garage:deuxfleurs.fr}
+\end{frame}
+
+\begin{frame}
+ \frametitle{Our objective at Deuxfleurs}
+
+ \begin{center}
+ \textbf{Promote self-hosting and small-scale hosting\\
+ as an alternative to large cloud providers}
+ \end{center}
+ \vspace{2em}
+ \visible<2->{
+ Why is it hard?
+ }
+ \visible<3->{
+ \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 :