\documentclass[10pt,a4paper]{article}

% Packages
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\usepackage{multicol}           % Allows multicols in tables
\usepackage{tabularx}           % Intelligent column widths
\usepackage{tabulary}           % Used in header and footer
\usepackage{hhline}             % Border under tables
\usepackage{graphicx}           % For images
\usepackage{xcolor}             % For hex colours
%\usepackage[utf8x]{inputenc}    % For unicode character support
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\usepackage{colortbl}           % For coloured tables
\usepackage{setspace}           % For line height
\usepackage{lastpage}           % Needed for total page number
\usepackage{seqsplit}           % Splits long words.
%\usepackage{opensans}          % Can't make this work so far. Shame. Would be lovely.
\usepackage[normalem]{ulem}     % For underlining links
% Most of the following are not required for the majority
% of cheat sheets but are needed for some symbol support.
\usepackage{amsmath}            % Symbols
\usepackage{MnSymbol}           % Symbols
\usepackage{wasysym}            % Symbols
%\usepackage[english,german,french,spanish,italian]{babel}              % Languages

% Document Info
\author{vinu76jsr}
\pdfinfo{
  /Title (system-design-template.pdf)
  /Creator (Cheatography)
  /Author (vinu76jsr)
  /Subject (System Design Template Cheat Sheet)
}

% Lengths and widths
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% This two commands together give roughly
% the right line height in the tables
\renewcommand{\arraystretch}{1.3}
\onehalfspacing

% Commands
\newcommand{\SetRowColor}[1]{\noalign{\gdef\RowColorName{#1}}\rowcolor{\RowColorName}} % Shortcut for row colour
\newcommand{\mymulticolumn}[3]{\multicolumn{#1}{>{\columncolor{\RowColorName}}#2}{#3}} % For coloured multi-cols
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\newcommand{\tn}{\tabularnewline} % Required as custom column type in use

% Font and Colours
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\definecolor{FootBackground}{HTML}{666666}
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\renewcommand{\familydefault}{\sfdefault}
\color{TextColor}

% Header and Footer
\pagestyle{fancy}
\fancyhead{} % Set header to blank
\fancyfoot{} % Set footer to blank
\fancyhead[L]{
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{C}
    \SetRowColor{DarkBackground}
    \vspace{-7pt}
    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
    }
\end{tabulary}
\columnbreak
\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{System Design Template Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{vinu76jsr} via \textcolor{DarkBackground}{\uline{cheatography.com/163274/cs/34196/}}}
\end{tabulary}
\end{multicols}}

\fancyfoot[L]{ \footnotesize
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{LL}
  \SetRowColor{FootBackground}
  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}vinu76jsr \\
  \uline{cheatography.com/vinu76jsr} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Published 15th September, 2022.\\
   Updated 15th September, 2022.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Sponsor}}  \\
  \SetRowColor{white}
  \vspace{-5pt}
  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
\end{tabulary}
\end{multicols}}




\begin{document}
\raggedright
\raggedcolumns

% Set font size to small. Switch to any value
% from this page to resize cheat sheet text:
% www.emerson.emory.edu/services/latex/latex_169.html
\footnotesize % Small font.

\begin{multicols*}{2}

\begin{tabularx}{8.4cm}{x{5.12 cm} x{2.88 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{0. Non-functional Requirements (NFRs)}}  \tn
% Row 0
\SetRowColor{LightBackground}
Security & Capacity \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
Compatibility (OS, etc) & reliability \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
Availability & Maintainable \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
Manageable & Scalability \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
Usability & Performance \tn 
% Row Count 5 (+ 1)
% Row 5
\SetRowColor{white}
Regulatory & Environmental \tn 
% Row Count 6 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.28 cm} x{4.72 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{2. Estimations}}  \tn
% Row 0
\SetRowColor{LightBackground}
Throughput (QPS, read/write) & Latency \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
R/W ration & Traffic Estimates - write(QPS, volume of data) and read (QPS volumen of data \tn 
% Row Count 6 (+ 4)
% Row 2
\SetRowColor{LightBackground}
Storage Estimates & Memory Estimates (Cache, what kind of data in it) \tn 
% Row Count 9 (+ 3)
% Row 3
\SetRowColor{white}
RAM & SSD or disk \tn 
% Row Count 10 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{2.8 cm} x{5.2 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Features and Expectation}}  \tn
% Row 0
\SetRowColor{LightBackground}
Use case & Scenarios to not cover \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
who will use & How many will use \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{Usage patterns} \tn 
% Row Count 3 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{3. Design Goals}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{Latency / throughput requests} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{Consistency vs Availability} \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{- weak / strong or eventual consistency} \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{- failover / replication availability} \tn 
% Row Count 4 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{4.08 cm} x{3.92 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{4. High Level Design}}  \tn
% Row 0
\SetRowColor{LightBackground}
APIs for read write scenario & DB schema \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
Basic algo & HLD for Read/write scenario \tn 
% Row Count 4 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{5. Deep Dive}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{Deep Dive \newline % Row Count 1 (+ 1)
- scaling algo \newline % Row Count 2 (+ 1)
- scaling components \newline % Row Count 3 (+ 1)
  - Availability, consistency and scale story of each component \newline % Row Count 5 (+ 2)
  - consistency and availability patterns \newline % Row Count 6 (+ 1)
- Components \newline % Row Count 7 (+ 1)
-DNS - CDN (push vs pull) \newline % Row Count 8 (+ 1)
- LB (active passive, active active, L4 , L7) \newline % Row Count 9 (+ 1)
- Reverse proxy \newline % Row Count 10 (+ 1)
- App layers  scaling ( microservices, service discovery) \newline % Row Count 12 (+ 2)
- DB (RDBMS, NoSQL) \newline % Row Count 13 (+ 1)
  - RDBMS ( master-slave, Master, master, federarion, sharding, Denormalization, SQL tuning) \newline % Row Count 15 (+ 2)
  - NoSQL ( KV\textless{} wide column, graph, document \newline % Row Count 16 (+ 1)
    - fast lookups \newline % Row Count 17 (+ 1)
       - RAM (redis, memcache \newline % Row Count 18 (+ 1)
       - AP - Cassandra, RIAK \newline % Row Count 19 (+ 1)
       - CP - HBase, Mongo \newline % Row Count 20 (+ 1)
- Caches \newline % Row Count 21 (+ 1)
 - client, CDN, server, DB, applicaiton, query, object% Row Count 23 (+ 2)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}


% That's all folks
\end{multicols*}

\end{document}