1 #+TITLE: Sixth - system for data storage, computation, exploration and interaction
4 - This is a subproject of [[http://www2.svjatoslav.eu/gitbrowse/sixth/doc/index.html][Sixth]]
6 - [[http://www2.svjatoslav.eu/gitweb/?p=sixth-data.git;a=snapshot;h=HEAD;sf=tgz][download latest snapshot]]
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10 License]] or later as published by the Free Software Foundation.
14 - Homepage: http://svjatoslav.eu
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32 :ID: f6764282-a6f6-44e6-8716-b428074dd093
34 Provide versioned, clustered, flexible, distributed, multi-dimensional
35 data storage engine for the [[http://www2.svjatoslav.eu/gitbrowse/sixth/doc/index.html][Sixth computation engine]].
37 + Speaking of traditional relational database and object oriented
38 business applications:
40 + I hate object-relational impedance mismatch.
42 + I don't like to convert data between persistent database and
43 runtime objects for every transaction. How about creating united
44 database/computation engine instead to:
46 + Eliminate constant moving and converting of data between 2 systems
47 and make computing happen close to where the data is stored.
49 + Abstract away difference between RAM VS persistent storage. Let
50 the system decide at runtime which data to keep in what kind of
54 + Relational databases:
56 + Indexable / Quickly searchable.
58 + Git (version control system)
60 + Branchable / mergeable.
61 + Transparent cansistency, checksumming and deduplication.
63 https://www.kenneth-truyers.net/2016/10/13/git-nosql-database/ )
67 :ID: d2375acc-af14-4f18-8ad0-7949501178c5
69 + Appears to have more than 3D dimensional design. Food for
71 + https://singularityhub.com/2017/06/21/is-there-a-multidimensional-mathematical-world-hidden-in-the-brains-computation/
73 + It directly inspires following ideas
74 + [[id:5d287158-53ea-44a2-a754-dd862366066a][Distributed comutation and data storage]]
75 + [[id:a117c11e-97c1-4822-88b2-9fc10f96caec][Mapping of hyperspace to traditional object-oriented model]]
76 + [[id:b6b15bd2-c78b-4c51-a343-72843a515c29][Handling of relations]]
79 ** Distributed computation and data storage
81 :ID: 5d287158-53ea-44a2-a754-dd862366066a
83 Maybe every problem can be translated to geometry (use any shapes and
84 as many dimensions as you need). Solution(s) to such problems would
85 then appear as relatively simple search/comparison/lookup results. As
86 a bonus, such geometrical *data storage* AND *computation* can be
87 naturally made in *parallel* and *distributed*. That's what neurons in
88 the brain appear to be doing ! :) . Learning means building/updating
89 the model (the hard part). Question answering is making (relatively
90 simple) lookups (geometrical queries) against the model.
91 ** Mapping of hyperspace to traditional object-oriented model
93 :ID: a117c11e-97c1-4822-88b2-9fc10f96caec
95 Object oriented programming is inspired by the way human mind
96 operates. It allows programmer to express ideas to computer in a more
99 It is possible to map object model to geometrical hyperspace:
101 + Object is a point in space (universe). Each object member variable
102 translates to its own dimension. That is: if class declares 4
103 variables for an object, then corresponding object can be stored as
104 a single point inside 4 dimensional space. Variable values translate
105 to point coordinates in space. That is: Integer, floating point
106 number and even boolean and string can be translated to linear value
107 that can be used as a coordinate along particular dimension.
109 + Each class declares its own space (universe). All class instances
110 (objects) are points inside that particular universe. References
111 between objects of different types are hyperlinks (portals) between
113 ** Handling of relations
115 :ID: b6b15bd2-c78b-4c51-a343-72843a515c29
117 Consider we want to create database of books and authors. Book can
118 have multiple authors, and single person can be author for multiple
119 books. It is possible to store how many hours of work each author has
120 contributed to every book, using hyperspace as follows:
122 + Every dimension corresponds to one particular book author. (10
123 authors in the database, would require 10 dimensional space)
124 + Point in space corresponds to one particular book.
125 + Point location along particular (author) dimension corresponds
126 to amount of work contributed by particular author for given
131 + Every dimension corresponds to one particular book.
132 + Point in space corresponds to one particular author in the entire
134 + Point location along particular (book) dimension corresponds to
135 amount of work contributed for book by given author (point).
137 ** Layered architecture
138 + layer 1 :: disk / block storage / partition
140 + layer 2 :: key/value storage. Keys are unique and are dictated by
141 storage engine. Value is arbitrary but limited size byte
142 array. This layer is responsible for handling disk
143 defragmentation and consistency in case of crash
146 + layer 3 :: key/value storage. Keys are content hashes. Values are
147 arbitrary but limited size content byte arrays. This
148 layer effectively implements content addressable
149 storage. Content addressible storage enables GIT-like
150 behavior (possibility for competing branches, retaining
151 history, transparent deduplication)
153 + layer 4 :: Implements arbitrary dimensional multiverse.
155 + layer 5 :: Distributed computation engine.
158 - More or less defined [[id:f6764282-a6f6-44e6-8716-b428074dd093][Vision / goal]].
160 - Collected some [[id:d2375acc-af14-4f18-8ad0-7949501178c5][ideas]].
162 - Implemented very simple persistent key-value map.
163 - Long term goal is to use it as a backing storage engine and
164 implement more advanced features on top of this.
167 Interesting or competing projects with good ideas:
169 + GRAKN.AI: database in the form of a knowledge graph that uses
170 machine reasoning to simplify data processing challenges for AI
174 + Gemstone/S based on Smalltalk.
175 + http://esug.org/data/ESUG2015/3%20wednesday/1100-1130%20SQL%20Queries%20on%20Smalltalk%20Objects/SQL%20Queries%20in%20Smalltalk%20(James%20Foster).pdf
177 + Magma distributed database in Smalltalk.
178 + http://wiki.squeak.org/squeak/2665
181 + https://github.com/zetavm/zetavm