diff --git a/tex/draft/background.bib b/tex/draft/background.bib
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--- /dev/null
+++ b/tex/draft/background.bib
@@ -0,0 +1,28 @@
+@inproceedings{!BGW.2010.CDN,
+  title={Distributed caching algorithms for content distribution networks},
+  author={Borst, Sem and Gupta, Varun and Walid, Anwar},
+  booktitle={2010 Proceedings IEEE INFOCOM},
+  pages={1--9},
+  year={2010},
+  organization={IEEE}
+}
+
+@article{KD.2002.Akamai_CoordCacheRepl,
+  title={Coordinated placement and replacement for large-scale distributed caches},
+  author={Korupolu, Madhukar R. and Dahlin, Michael},
+  journal={IEEE Transactions on Knowledge and Data Engineering},
+  volume={14},
+  number={6},
+  pages={1317--1329},
+  year={2002},
+  publisher={IEEE}
+}
+
+@misc{Z.2022.Linux_LRU_GEN, 
+    title={Multi-Gen LRU}, 
+    url={https://www.kernel.org/doc/html/v6.6-rc5/mm/multigen_lru.html}, 
+    journal={The Linux Kernel documentation}, 
+    author={Zhao, Yu}, 
+    editor={Alumbaugh, T JEditor}, 
+    year={2022}
+} 
\ No newline at end of file
diff --git a/tex/draft/background.md b/tex/draft/background.md
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+> A High-Performance Framework for Dynamic Cache-Replacement-Strategy-Selection in Distributed Shared Memory Systems
+
+# Background
+> Various Kinds of (Distributed) Systems (What makes a system "distributed", anyways?) $\rightarrow$ 
+> (Distributed) Cache Replacement Algorithms (Strategies) $\rightarrow$ 
+> Limitations to common distributed cache replacement practices in extremely time-sensitive scenarios (like ours) $\rightarrow$
+> Variables that need to be accounted for in cache replacement problms $\rightarrow$ 
+> Need for dynamic manipulation to cache replacement strategy, which implies probing & measurement & comparison, etc. $\rightarrow$ 
+> Framework for such a thing, which is what we explore in this paper.
+
diff --git a/tex/draft/background.pdf b/tex/draft/background.pdf
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diff --git a/tex/draft/background.tex b/tex/draft/background.tex
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+++ b/tex/draft/background.tex
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+\documentclass{article}
+\usepackage{biblatex}
+
+\title{Thesis Background}
+\author{Zhengyi Chen}
+\date{\today}
+
+\addbibresource{../main.bib}
+\addbibresource{background.bib}
+
+\begin{document}
+\maketitle
+
+% Phil Karlton's famous quote about the 2 hard problems in CS here, maybe.
+
+The problem of cache replacement is general to computer systems of all scales and topologies: 
+topologically massive systems, such as cellular stations\cite{GWHSZ.2014.CacheReplAsMDP-QLearning} 
+and CDNs\cites{EHOFK.2020.IBM-LRUvsFIFO}{!BGW.2010.CDN}{KD.2002.Akamai_CoordCacheRepl}, and  
+data-path level implementations for processors\cites{QJPSE.2007.DIP}{JTSE.2010.RRIP}{SYS.2021.RLR} 
+alike requires good solutions to maintain and maximize application performance 
+to various levels of granularity. On the other hand, the set of feasible/performant solutions 
+(i.e., cache replacement policies) to one system may or may not be inspiring to performance 
+improvement on another system of different scale, objectives, tasks, constrained by a 
+(mostly) different context of available inputs, metadata, etc. 
+
+We propose a framework for dynamic cache-replacement-strategy selection that balances computation 
+cost, optimality, and working-set estimation for each strategy while incurring minimal performance 
+penalties for a shared-kernel cooperative Distributed Shared Memory system. (We identify \dots)
+
+\section[1]{Existing Cache Replacement Strategies}
+\subsection[1.1]{LRU-derived Algorithms}
+\subsection[1.2]{FIFO-derived Algorithms}
+\subsection[1.3]{Cache Replacement in Processors}
+\subsection[1.4]{Machine Learning and Heuristics}
+
+\section[2]{The Cache Replacement Problem}
+
+\section[3]{Page Replacement in (SMP or?) Linux}
+%-- But LRU_GEN is interop-ed with an array of other systems, 
+% how could we trivially implement alternative page replacement algorithms with maximum feature 
+% compliance? 
+% 
+
+% Cache replacement strategies local to its own resources, for example CPU cache line replacement stategies, may not optimally perform cache eviction and 
+% replacement for CDNs which (1) center \textit{freqency} over \textit{recency} and (2) could 
+% cooperate to utilize a nearby cache with small additional transfer cost\cite{KD.2002.Akamai_CoordCacheRepl}. 
+% Orthogonally, cache replacement strategies that perform well on one task might perform less well on 
+% another, as implied by \cite{SYS.2021.RLR} among others. 
+
+% this is the case for Linux's \textit{multi-gen LRU} page replacement algorithm which 
+% by default prioritizes memory access via page table to be stored in cache over those via file 
+% descriptors (though it dynamically self-adjusts)\cite{Z.2022.Linux_LRU_GEN} -- the kernel developers 
+% assume that the former is costlier upon page fault. This is well and good for programs with 
+
+% This is not to say that some amount of "technological transfer" from cache replacement strategies 
+% intended for one specific setting could not be 
+
+% A performant cache replacement strategy, relative to its hosting
+% system, needs to strike balance between optimality and the necessary computation needed to make a 
+% replacement/eviction decision. 
+
+\printbibliography
+\end{document}
\ No newline at end of file
diff --git a/tex/misc/w4_slides.bib b/tex/main.bib
similarity index 99%
rename from tex/misc/w4_slides.bib
rename to tex/main.bib
index ca3361f..1cbd95d 100644
--- a/tex/misc/w4_slides.bib
+++ b/tex/main.bib
@@ -128,4 +128,4 @@ abstract = {In this paper we describe the way thread migration can be carried in
   pages={155--169},
   year={2000},
   organization={Springer}
-}
+}
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diff --git a/tex/misc/w4_slides.pdf b/tex/misc/w4_slides.pdf
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--- a/tex/misc/w4_slides.tex
+++ b/tex/misc/w4_slides.tex
@@ -6,7 +6,7 @@
 \author{Zhengyi Chen} % Amir?
 \date{\today}
 
-\addbibresource{w4_slides.bib}
+\addbibresource{../main.bib}
 
 \begin{document}
 % Title page