From 2316187f481ff4854fd93e381e6b1c802cd5bac0 Mon Sep 17 00:00:00 2001
From: Svjatoslav Agejenko <svjatoslav@svjatoslav.eu>
Date: Thu, 25 May 2017 23:02:21 +0300
Subject: [PATCH] Elaborated on high level vision.

---
 doc/data model.png | Bin 0 -> 32758 bytes
 doc/index.html     | 507 +++++++++++++++++++++++++++++++--------------
 doc/index.org      |  64 ++++++
 3 files changed, 411 insertions(+), 160 deletions(-)
 create mode 100644 doc/data model.png

diff --git a/doc/data model.png b/doc/data model.png
new file mode 100644
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 <body>
-<div id="content">
-<h1 class="title">Sixth - system for data storage, computation, exploration and interaction</h1>
-<div id="table-of-contents">
-<h2>Table of Contents</h2>
-<div id="text-table-of-contents">
-<ul>
-<li><a href="#orgheadline1">1. Current status</a></li>
-</ul>
-</div>
-</div>
-<hr  />
+<div id="content" class="container">
+<div class="row"><div class="col-md-9"><h1 class="title">Sixth - system for data storage, computation, exploration and interaction</h1>
+<hr >
 <ul class="org-ul">
-<li>This is a subproject of <a href="http://www2.svjatoslav.eu/gitbrowse/sixth/doc/index.html">Sixth</a></li>
+<li>This is a subproject of <a href="http://www2.svjatoslav.eu/gitbrowse/sixth/doc/index.html">Sixth</a>
+</li>
 
-<li><a href="http://www2.svjatoslav.eu/gitweb/?p=sixth-data.git;a=snapshot;h=HEAD;sf=tgz">download latest snapshot</a></li>
+<li><a href="http://www2.svjatoslav.eu/gitweb/?p=sixth-data.git;a=snapshot;h=HEAD;sf=tgz">download latest snapshot</a>
+</li>
 
 <li>This program is free software; you can redistribute it and/or modify
 it under the terms of version 3 of the <a href="https://www.gnu.org/licenses/lgpl.html">GNU Lesser General Public
-License</a> or later as published by the Free Software Foundation.</li>
+License</a> or later as published by the Free Software Foundation.
+</li>
 
 <li>Program author:
 <ul class="org-ul">
-<li>Svjatoslav Agejenko</li>
-<li>Homepage: <a href="http://svjatoslav.eu/">http://svjatoslav.eu/</a></li>
-<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu/">mailto://svjatoslav@svjatoslav.eu/</a></li>
-</ul></li>
+<li>Svjatoslav Agejenko
+</li>
+<li>Homepage: <a href="http://svjatoslav.eu">http://svjatoslav.eu</a>
+</li>
+<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">mailto://svjatoslav@svjatoslav.eu</a>
+</li>
+</ul>
+</li>
 
-<li><a href="http://svjatoslav.eu/programs.jsp">other applications hosted at svjatoslav.eu</a></li>
+<li><a href="http://svjatoslav.eu/programs.jsp">other applications hosted at svjatoslav.eu</a>
+</li>
 </ul>
 
 
-<div id="outline-container-orgheadline1" class="outline-2">
-<h2 id="orgheadline1"><span class="section-number-2">1</span> Current status</h2>
+<div id="outline-container-sec-1" class="outline-2">
+<h2 id="sec-1"><span class="section-number-2">1</span> Vision / goal</h2>
 <div class="outline-text-2" id="text-1">
+<p>
+Provide versioned, clustered, flexible, object-relational database
+functionality for the <a href="http://www2.svjatoslav.eu/gitbrowse/sixth/doc/index.html">Sixth computation engine</a>.
+</p>
+
+<ul class="org-ul">
+<li>I hate object-relational impedance mismatch.
+</li>
+
+<li>I don't like to convert data between persistent database and runtime
+objects for every transaction. How about creating united
+database/computation engine instead to:
+<ul class="org-ul">
+<li>Eliminate constant moving and converting of data between 2 systems.
+</li>
+<li>Abstract away difference between RAM VS persistent storage. Let
+the system decide at runtime which data to keep in what kind of
+memory.
+</li>
+</ul>
+</li>
+</ul>
+</div>
+
+<div id="outline-container-sec-1-1" class="outline-3">
+<h3 id="sec-1-1"><span class="section-number-3">1.1</span> Inspiration</h3>
+<div class="outline-text-3" id="text-1-1">
+<ul class="org-ul">
+<li>Relational databases:
+<ul class="org-ul">
+<li>Transactional.
+</li>
+<li>Indexable / Quickly searchable.
+</li>
+</ul>
+</li>
+
+<li>Git (version control system)
+<ul class="org-ul">
+<li>Versionable
+</li>
+<li>Branchable / mergeable.
+</li>
+<li>Transparent cansistency, checksumming and deduplication.
+</li>
+<li>(Git as a database:
+<a href="https://www.kenneth-truyers.net/2016/10/13/git-nosql-database/">https://www.kenneth-truyers.net/2016/10/13/git-nosql-database/</a> )
+</li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+
+<div id="outline-container-sec-1-2" class="outline-3">
+<h3 id="sec-1-2"><span class="section-number-3">1.2</span> Solution (the big idea)</h3>
+<div class="outline-text-3" id="text-1-2">
+<p>
+I see 4D data structure.
+</p>
+
+
+<figure>
+<p><img src="data model.png" class="img-responsive" alt="data model.png">
+</p>
+</figure>
+
+<p>
+Dimensions:
+</p>
+<ul class="org-ul">
+<li>List of all the objecs in the system (rows).
+</li>
+<li>List of all declared unique object fields (columns).
+</li>
+<li>List of all historical transactions/commits/versions (think of
+sheets of paper).
+</li>
+<li>List of all concurrently running branches/threads. Branches can
+appear and merge over time as needed.
+</li>
+<li>(Every cell is concrete field value within an object)
+</li>
+</ul>
+
+<p>
+Partitioning/clustering:
+</p>
+<ul class="org-ul">
+<li>Why not to partition/(load balance) as required across networked
+physical computers along arbitrary dimension(s) declared above ?
+</li>
+</ul>
+
+<p>
+Indexing (for fast searching):
+</p>
 <ul class="org-ul">
-<li>Implemented very simple persistent key-value map.</li>
+<li>Why not to index along arbitrary dimensions (as required) ?
+</li>
+</ul>
+
+<p>
+Further optimizations:
+</p>
+<ul class="org-ul">
+<li>In current early stage, trying to focus on minimum possible set of
+features that would provide maximum possible set of power/benefit :)
+</li>
+<li>Once featres are locked. Anything can be optimised. Optimization for
+size (deduplication) can be solved using Git style content
+addressible storage mechanism.
+</li>
+</ul>
+</div>
+</div>
+</div>
+
+<div id="outline-container-sec-2" class="outline-2">
+<h2 id="sec-2"><span class="section-number-2">2</span> Current status</h2>
+<div class="outline-text-2" id="text-2">
+<ul class="org-ul">
+<li>Implemented very simple persistent key-value map.
+</li>
 </ul>
 
 <p>
@@ -186,11 +359,25 @@ Long term goal is to implement more advanced features on top of this.
 </p>
 </div>
 </div>
+</div><div class="col-md-3"><nav id="table-of-contents">
+<div id="text-table-of-contents" class="bs-docs-sidebar">
+<ul class="nav">
+<li><a href="#sec-1">1. Vision / goal</a>
+<ul class="nav">
+<li><a href="#sec-1-1">1.1. Inspiration</a></li>
+<li><a href="#sec-1-2">1.2. Solution (the big idea)</a></li>
+</ul>
+</li>
+<li><a href="#sec-2">2. Current status</a></li>
+</ul>
 </div>
-<div id="postamble" class="status">
-<p class="author">Author: Svjatoslav Agejenko</p>
-<p class="date">Created: 2016-08-23 Tue 09:37</p>
-<p class="validation"><a href="http://validator.w3.org/check?uri=referer">Validate</a></p>
+</nav>
+</div></div></div>
+<footer id="postamble" class="">
+<div><p class="author">Author: Svjatoslav Agejenko</p>
+<p class="date">Created: 2017-05-25 Thu 22:58</p>
+<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 25.1.1 (<a href="http://orgmode.org">Org-mode</a> 8.2.10)</p>
 </div>
+</footer>
 </body>
 </html>
diff --git a/doc/index.org b/doc/index.org
index 3c93341..62f2957 100644
--- a/doc/index.org
+++ b/doc/index.org
@@ -17,6 +17,70 @@
 - [[http://svjatoslav.eu/programs.jsp][other applications hosted at svjatoslav.eu]]
 
 
+* (document settings)                                              :noexport:
+** use dark style for TWBS-HTML exporter
+#+HTML_HEAD: <link href="https://bootswatch.com/darkly/bootstrap.min.css" rel="stylesheet">
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.1/js/bootstrap.min.js"></script>"
+#+HTML_HEAD: <style type="text/css">
+#+HTML_HEAD:   footer {background-color: #111 !important;}
+#+HTML_HEAD:   pre {background-color: #111; color: #ccc;}
+#+HTML_HEAD: </style>
+
+* Vision / goal
+Provide versioned, clustered, flexible, object-relational database
+functionality for the [[http://www2.svjatoslav.eu/gitbrowse/sixth/doc/index.html][Sixth computation engine]].
+
++ I hate object-relational impedance mismatch.
+
++ I don't like to convert data between persistent database and runtime
+  objects for every transaction. How about creating united
+  database/computation engine instead to:
+  + Eliminate constant moving and converting of data between 2 systems.
+  + Abstract away difference between RAM VS persistent storage. Let
+    the system decide at runtime which data to keep in what kind of
+    memory.
+
+** Inspiration
++ Relational databases:
+  + Transactional.
+  + Indexable / Quickly searchable.
+
++ Git (version control system)
+  + Versionable
+  + Branchable / mergeable.
+  + Transparent cansistency, checksumming and deduplication.
+  + (Git as a database:
+    https://www.kenneth-truyers.net/2016/10/13/git-nosql-database/ )
+
+** Solution (the big idea)
+I see 4D data structure.
+
+[[file:data model.png]]
+
+Dimensions:
++ List of all the objecs in the system (rows).
++ List of all declared unique object fields (columns).
++ List of all historical transactions/commits/versions (think of
+  sheets of paper).
++ List of all concurrently running branches/threads. Branches can
+  appear and merge over time as needed.
++ (Every cell is concrete field value within an object)
+
+Partitioning/clustering:
++ Why not to partition/(load balance) as required across networked
+  physical computers along arbitrary dimension(s) declared above ?
+
+Indexing (for fast searching):
++ Why not to index along arbitrary dimensions (as required) ?
+
+Further optimizations:
++ In current early stage, trying to focus on minimum possible set of
+  features that would provide maximum possible set of power/benefit :)
++ Once featres are locked. Anything can be optimised. Optimization for
+  size (deduplication) can be solved using Git style content
+  addressible storage mechanism.
+
 * Current status
 - Implemented very simple persistent key-value map.
 
-- 
2.20.1