MongoDB is NoSQL database which is based on documents. Some basic commands and architecture of MongoDB are explained, also concepts like Sharding and map/reduce are represented too.

1. MongoDB
Hamid Shahrivari

2. Outlines
 What is NoSQL
 MongoDB
 Advantages and Disadvantages
 Data Model and Security
 Basic Command
 MongoDB Architecture
 Protections and Security
 Versions

3. NoSQL
 What is NoSQL
 Different Between NoSQL and RDBMS

4. CAP

5.  MongoDB introduced by Gen10 in 2007
 MongoDB is documental-based database
 MongoDB is open source

7. CharactrisityMongoDB
 Each field could be used as index and a field could
possesses two index
 Implemented with C, C++ and Javascript
 Supports text search for textual fields
 Contains general API and Drivers
 Supports Journaling
 Maintains big binary fill with help of GridFS
 MongoDB is scale out with help of Sharding
 Support Replication

8. MongoDB Disadvantages
Data redundancy after writing
Weakness in writing complex query
Weakness in supporting relational concepts
Transitions are atomic in document scale

9. Documental Model
 Document collection concept is similar with
table
 Document concept is similar with record
 Documental model is similar with key-value
stores
 Clusterpoint, Couchbase, DocumentDB, HyperDex, Lotus Notes,
MarkLogic, MongoDB, OrientDB, Qizx, RethinkDB

10. Data Model

11. Create Relation between Two Documents
Embedded Data

12. Create Relation between Two Documents
Reference

13. Data Security
 basically available soft state eventually
consistent
 Weak consistency because it does not contain
unique schema
 Transitions are atomic in document level
 Not supporting cascade effect
Programmer is responsible for data authenticity
so

14. Basic Command
 Insert
 Select

15. Basic Command
 Update
 Delete

16. Sharding
Separate big data to small Chunk and distribute
them on different systems automatically

17. Shard Keys
Shard key is common in all chunk and used
for manipulating data

18. Chunk Transportation between systems
 Transportation purpose is balancing system
traffic
 It could happen both manually or automatically

19. Replication
 Create various copy of data on different servers in
order to improve data availability and reduce traffic

20. Replication

21. AlternationPrimary

22. Secondary Policy
 Prevent a Secondary to become Primary
 Hide a Secondary
 Prohibit reading from a Secondary
 Assign Secondary as preserver of database
previous condition
 Prevent a Secondary to vote in elections

23. Secondary Hidden

24. Secondary Preserver

25. Primary Election
 It is assign through an election
 The Secondary which is in same server
with Primary could not be elected
 Hidden and preserver Secondary could not
be candidate but it could vote
 Secondary which does not possess vote
right could also be candidate

26. Arbiter
Corporate in election in order to prevent
even voting occurrence

27. ‫مفهوم‬Map Reduce
Execute a query on group of system and merge the results

28. Map ReduceandMongoDB

29. Security
 Could grant permission for several user
 All authentication data are saved in Admin
database
 At the beginning, connection protocols are not
secure

30. Data security
Default encrypting system is AES256-CBC
with OpenSSL
Also support AES256-GCM and FIPS
EncryptionSteps
Generate master key
Generate key for each database
Encrypt each database with its key
Encrypt key with master key