An internal workshop about MongoDB at Climatempo.

1. MongoDB
Introduction

2. Disclaimer

3. History
Kevin P. RyanDwight Merriman Eliot Horowitz

4. History
OCT
2007
FEB
2009
AUG
2013
First Release

5. History
+4.3k
CUSTOMERS
+85
COUNTRIES
+800
EMPLOYEES
2017
19
COUNTRIES
IN
IN
+30mi
DOWNLOADS

6. MongoDB Solution
know the proposal

7. Para quem só sabe usar
martelo todo problema é
um prego!

8. Characteristics
• NoSQL
• Developer Friendly
• Schemaless
• JSON Document based
• Easy to start
• Implicit structure
• Support many drivers

9. Comparison with SQL
SQL Terms/Concepts MongoDB Terms/Concepts
DATABASE DATABASE
TABLE COLLECTION
ROW DOCUMENT
COLUMN FIELD
INDEX INDEX
TABLE JOINS EMBEDDED DOCUMENTS AND LINKING
PRIMARY KEY PRIMARY KEY
TRANSACTIONS (COMMIT/ROOLBACK) NA
SCHEMA NA

10. Indexes
Index Reference
James 1
Lyon 2
Pat 3
Philip 7
Ramel 4
Ramel 6
Ramel 8
Ramel 1000
Rozer 9
Tim 5
... ...
... ...
Row Name Age
1 James 23
2 Lyon 22
3 Pat 20
4 Ramel 23
5 Tim 20
6 Ramel 21
7 Philip 19
8 Ramel 22
9 Rozer 17
... ... ...
... ... ...
1000 Ramel 19
Index player

11. Indexes
Pro
Faster to get
Cons
Slower writing

12. WriteConcern
acknowledgements of write operations
level meaning
0 without acknowledgement
1 acknowledgement of standalone or primary
> 1 acknowledgement of defined amount of nodes
majority acknowledgement of majority of nodes
<tag set> acknowledgement of nodes with tag specified

13. WriteConcern
{
w: "majority",
wtimeout: 500
}

14. Journaling
level meaning
0 don't wait for persistence on disk
1 wait for persistence on disk
acknowledgements of persistence on disk
Client journal Diskcommits every
100 milliseconds
write operations
intermediate database

15. WriteConcern & Journaling
{
w: 1,
j: 0,
wtimeout: 500
}

16. Scalability
&
High Availability

17. ReplicaSet

18. ReplicaSet

19. Sharding

20. Live Coding
because talking is cheap