1. Quick Understanding of NoSQL
Edward J. Yoon
@ Oracle

2. Agenda
• Why Big Data solutions are appeared?
– What was problem?
• What’s HBase?
• NoSQLs Trends
– NoSQLs Comparison

3. Managing user profiles
User-ID, …

4. Managing user profiles
… User-ID, …
…
… …

5. Managing user profiles
… User-ID, …
…
… …
Let’s assume that,
Most million+ users are login between 9 ~ 10 AM.
And, I wanna update their last logged in time.

6. Managing user profiles
…
! 1~3 millions records .
User-ID, …
Max connections, Hardware limit,
Query performance on, …., etc.
…
… …

7. Managing user profiles
…
! 1~3 millions records .
User-ID, …
Max connections, Hardware limit,
Query performance on, …., etc.
…
… …
… User-ID, …
…
Solution!? … …
Manual Range/Hash Partitioning

8. Managing user profiles
…
! 1~3 millions records .
User-ID, …
Max connections, Hardware limit,
Query performance on, …., etc.
…
What happens, if scheme should be changed or,
… … need to increase nodes?
… User-ID, …
…
Solution!? … …
Manual Range/Hash Partitioning

9. NoSQL
• Scheme-free
• Horizontal Scalability
– Distributed Storage
• Distributed computing e.g., M/R
• Connection Pool

10. NoSQLs trends

11. Comparison
Cassandra (V1.2)
MongoDB (V2.2)
• Written in: C++ • Written in Java
• License: AGPL • License: Apache
• Support Languages: All • Support Languages: All
• Architecture: Master/slave, JSON • Architecture: Master/slave, Columnar
• Queries: javascript expressions, MapReduce
• Known issues: None • Queries: Hive (MapReduce)
• Suitable for: Online applications • BigTable clone
• Suitable for: Ad-hoc Analytics, Column scanning
HBase (V0.92.0)
Oracle NoSQL
• Written in: Java
• License: Apache
• Support Languages: All • Written in: Java
• Architecture: Master/slave, Columnar • Support Languages: Java
• Queries: Hive (MapReduce) • Architecture: Master/slave, ACID
• BigTable clone • Suitable for: Online applications
• Suitable for: Ad-hoc Analytics, Column scanning
• Synchronous Replication