Opasnet Base: Difference between revisions

Revision as of 11:08, 9 February 2012

This page is a knowledge crystal of subtype method. The page identifier is Op_en5474
Moderator:Jouni (see all)
Citation of this page: Juha Villman, Einari Happonen, Jouni T. Tuomisto: Opasnet Base structure. Opasnet 2012. [1]. Accessed 21 Nov 2024.
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This page is about the Opasnet Base 2 -database.

Question

How to improve the existing Opasnet Base? Following issues of Opasnet Base 1 must be resolved:

Opasnet Base 1 structure makes filtering by location very slow on big data
Opasnet Base 1 structure is perhaps unnecessarily complex = queries are hard to adapt and read
MySQL is not ideal for storing huge amounts of data, or at least this is how we assume?
MySQL tables have fixed column types = difficult to store data objects with varying types of indices into one data table
Multiple languages (localization) not supported

Answer

MySQL is good on relations but weak on dynamic big data. Let's keep the basic "scaffold" in MySQL and store the big data (locations and results) into noSQL-base. After few days of research the best candidate for noSQL-base seems to be MongoDB. Combining relational MySQL and non-relational MongoDB will be the foundation for the new Opasnet Base 2.

Table structure in the database

All tables

acts
Uploads, updates, and other actions
Field	Type	Null	Extra	Key
id	int(10) unsigned	NO	auto_increment	PRI
type	ENUM('initial','replace','append')	NO
who	varchar(255)	NO
when	timestamp	NO
comments	varchar(255)	YES
lang	char(3)	NO	ISO 639-2, default:'eng'

acts_objs
Acts of an objects
Field	Type	Null	Extra	Key
act_id	int(10) unsigned	NO		PRI
obj_id	int(10) unsigned	NO		PRI
series_id	int(10) unsigned	NO
unit	varchar(64)	YES

objs
Object information (all objects)
Field	Type	Null	Extra	Key
id	int(10) unsigned	NO	auto_increment	PRI
ident	varchar(64)	NO		UNI
name	varchar(255)	NO
type	ENUM('variable','study','method','assessment','class','nugget','encyclopedia')	NO
page	int(10) unsigned	NO
wiki_id	tinyint(3) unsigned	NO

inds
Indices
Field	Type	Null	Extra	Key
id	int(10) unsigned	NO	auto_increment	PRI
act_id	int(10) unsigned	NO		UNI(with ident)
ident	varchar(64)	NO		UNI(with act_id)
type	ENUM('entity','number','time')	NO
description	varchar(255)	NO
page	int(10) unsigned	NO
wiki_id	tinyint(3) unsigned	NO
order_index	int(10) unsigned	NO
hidden	boolean	NO	false

wikis
Wiki information
Field	Type	Null	Extra	Key
id	tinyint(3)	NO		PRI
url	varchar(255)	NO
wname	varchar(255)	NO

MongoDB

Tables to store all locations and results

db.<obj.ident>.dat

act_id (indexed), <ind.id>, <ind.id>, ..., <ind.id>, res

Tables to store real location values for entity type indices ?

db.<obj.ident>.locs

ind_id(indexed), key, value

@@ Line 45: / Line 45: @@
 |type||ENUM('initial','replace','append')||NO||||
 |-
-|who||varchar(50)||NO||||
+|who||varchar(255)||NO||||
 |-
 |when||timestamp||NO||||
 |-
-|comments||varchar(250)||YES||||
+|comments||varchar(255)||YES||||
 |-
 |lang||char(3)||NO||ISO 639-2, default:'eng'||
@@ Line 85: / Line 85: @@
 |id||int(10) unsigned||NO||auto_increment||PRI
 |-
-|ident||varchar(20)||NO||||UNI
+|ident||varchar(64)||NO||||UNI
 |-
-|name||varchar(200)||NO||||
+|name||varchar(255)||NO||||
 |-
 |type||ENUM('variable','study','method','assessment','class','nugget','encyclopedia')||NO||||
@@ Line 153: / Line 153: @@
 |url||varchar(255)||NO||||
 |-
-|wname||varchar(20)||NO||||
+|wname||varchar(255)||NO||||
 |}
 |}