Keynote for the italian nosql day, I have tried to explain the meaning of the word "nosql" through an historical path

1. SQL
gabriele lana
gabriele.lana@cleancode.it
twitter: @gabrielelana
http://joind.in/2938

2. SQL I’am going to
tell you what
is this
thing...

3. SQL
is not about
rejecting
sql/relational
databases

4. SQL
is not about
embracing
non sql/
non relational
databases

5. then what is
this all
about?
let me tell you
a story...

6. Hype cycle of technology
peak of
inflated
expectation
Visibility
productivity
disillusionment
obsolescence
technology
trigger
maturity

7. Hype cycle of technology
disillusionment
leads to
technology
trigger
Visibility
maturity

8. but sometimes they come back
Visibility
maturity

9. volume => longevity (legacy)
Visibility
maturity

10. new ideas
are made of
old ideas
applied in
a different
context

11. an example

12. an example

13. an example

14. an example
???
probably
something
in between

15. All of this has happened
before, and it will all happen
again...

16. ok, but this
is the
nosql day!
what are
you trying
to say?
we should start
from the beginning...

17. dbms: the beginning
business
storage
ui
• single user
• data owned by applications
• custom solution

18. dbms: the beginning
business
storage
ui
• every applications needs to
develop his own solution...

19. dbms: first libraries
business
library
ui
• more robust solution

20. dbms: first libraries
(navigational databases)
FirstNode.SecondNode.attribute
attribute
FirstNode
attribute
SecondNode

21. dbms: first libraries
(navigational databases)
FirstNode.SecondNode.attribute
attribute
FirstNode
attribute
SecondNode
• cobol: banking
• m/mumps: health care

22. dbms: first libraries
(key value databases)
attribute
RecordKey
attribute
RecordKey
attribute
RecordKey
attribute
dKey

23. dbms: first libraries
(key value databases)
attribute
RecordKey
attribute
RecordKey
attribute
RecordKey
• dbm: ken thompson
-> QDBM
-> tokyo cabinet

25. dbms: relational model
rdbms
business
network
• system-r
• ingres ->
application postgres
application
• sybase
• informix
application

26. dbms: relational model
rdbms
business
network
duplicated
business
logic
application
who is the
application data’s
owner?
application

27. t ed
object en
r i
r
. o
oriented
lumn
el
co
at
t
tim
n
io
e d
e
m te
value
(m
u n
net
n
rt .
g/
c e
al
rr
o i
wo
d)
d r
rk
-> o ap/a d)
nav (ld
y
i ga
e
tio
k
n al
-

28. dbms: relational server
business
rdbms
• consistency
application • security
• integrity
application • validity
application

29. dbms: relational server
business
rdbms
relational
model as a
(declaratively)
application programmable
business logic
application
rise the data
driven design
application

30. impedance mismatch

31. context
purpose
cost of implementation

32. dbms: relational model
rdbms
business
network
duplicated
business
logic
application
who is the
application data’s
owner?
application

33. dbms: service oriented
application
application application
network

34. dbms: service oriented
application
ROA: an
architectural
application style where
applications
are
responsible
to deliver a
service to
network the network
(aka users
and other
applications)

35. SQL
is not about
rejecting
sql/relational
databases

36. SQL is about
rejecting
the notion
that there is
one true and
centralized way
to store any
kind of data

37. what about the future?
storage
for more
specific
data

38. what about the future?
knowledge
extraction

39. what about the future?
“REAL”
relational
databases

40. Questions?