91d437f0fb56cfb5b64de81b60bd6738

Source: http://www.greenplum.com/resources/MapReduce/

Source: http://www.pui.ch/phred/archives/2005/04/tags-database-schemas.html

…

In this solution, the schema has got just one table, it is denormalized.
This type is called “MySQLicious solution” because MySQLicious imports del.icio.us data into a table with this structure.

Intersection (AND)

Query for “search+webservice+semweb”:
SELECT *
FROM `delicious`
WHERE tags LIKE "%search%"
AND tags LIKE "%webservice%"
AND tags LIKE "%semweb%"

Union (OR)

Query for “search|webservice|semweb”:

SELECT *
FROM `delicious`
WHERE tags LIKE "%search%"
OR tags LIKE "%webservice%"
OR tags LIKE "%semweb%"

Minus

Query for “search+webservice-semweb”
SELECT *
FROM `delicious`
WHERE tags LIKE "%search%"
AND tags LIKE "%webservice%"
AND tags NOT LIKE "%semweb%"

Source : http://www.readwriteweb.com/archives/…compute_clouds.php

A traditional relational database architecture >

A compute cloud architecture, to resolve multiple issues, looks like >