Database Design for NoSQL System

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7141161 - Nguyễn Ngọc Tuyển

7140265 - Võ Thái Tuyến

Topics

Introduction Data Models Data Representation in NoAM Implementation Conclusion Q&A

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Introduction

More than 50 systems are available.3

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Introduction(cont.)

Conceptual Data Modeling

Aggregate Design

Aggregate Partitioning

High-level NoSQL Database Design

Implementation

=> To identify the various entities, relationships

=> To identify various classes of aggregate object needed in application

=> Aggregate was partitioned into smaller data elements

=> Aggregate are mapped to the NoAM intermediate data model

=> To map the intermediate data representation to the specific modeling elements of target data store

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Data Model

Introduction Data Model

Data Represen

tation

Implementation

Data Model

NoSQL Database Models Application Data Model Aggregate Data Model The NoAM Abstract Data Model

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NoSQL Database Models

Key-value stores. Extensible record stores. Document stores.

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Application Data Model

Using object-based data model: entities, value objects and relationships

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Aggregate Data Model

Application dataset. Aggregate classes – each having a distinct name. The extent of aggregate class in a set of aggregate objects Each aggregate object has a complex value and identifier

Aggregate Partition

Use a single element: small size or most its data is accessed or modified together.

Use multiple elements: large size and the operations frequently access or modify only specific portions of aggregate Two or more data elements should belong to the same

element if they are frequently accessed or modified together

Two or more data elements should belong to distinct elements if they are usually accessed or modified separately.

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Aggregate Partition(cont.)

Example:

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The NoAM Abstract Data Model

A NoAM database is a set of collections A collection is a set of blocks A block is non-empty set of entries Each entry is a pair <entryKey, entryValue>

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Data Representation

Introduction

Data Model

Data Representa

tion

Implemen-tation

Data Representation in NoAM

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Data Representation in NoAM(cont.)

2 strategies

EAO

Entry per Aggregate Object

ETF

Entry per Top-level Field

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Data Representation in NoAM(cont.)

CollectionHave more blocks

BlockHas single entry

Entry keyEmpty

Entry valuewhole complex

value

EAO

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Data Representation in NoAM(cont.)

CollectionHave more blocks

BlockHave multiple

entries

Entry keyAttribute name

Entry valueAttribute value

ETF

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Data Representation-Example

mary

𝜀username: “mary”firstName: “Momo”lastName: “Wilson”Games { (game: Game:2345 , opponent : Player: rick) , (game: Game: 2611 , opponent: Player: ann)}

Player

Collection Name

Block key Entry key(ek)

entry

Entry value (ev) EAO :

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Data Representation-Example

ETF

mary

username

firstName

lastName

Games

“mary”

“Momo”

“Wilson”

{(game: Game:2345 , opponent : Player: rick) , (game: Game: 2611 , opponent: Player: ann)}

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Player

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Implementation

Introduction

Data Model

Data Represen

tation

Implementation

Implement NoAM in NoSQL System

Key-Value Store

Extensible Record Store

Document Store

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Key-value store: Oracle NoSQL• ETF:

username

firstName

“mary”

“Momo”

Player

Key ( major key - minor key ):Collection / block key - entry key

Value:Entry value

Player/mary/-/username mary

Player/mary/-/firstName Momo

Collection Name

mary

Block key Entry key(ek)

entry

Entry value (ev)

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Key-value store: Oracle NoSQLEAO :

mary

𝜀username: “mary”firstName: “Momo”……..

Player

Key ( major key - minor key ):Collection / block key-entry key

Value:Entry value

Question1 ?

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Extensible Record Store:DynamoDB

username

firstName

“mary”

“Momo”

Player

Table Collection Name : Player

mary

Primary Key Block key

Value Attributes Entries Value

username mary firstName Momo

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Document Store : MongoDB

id documentmary {

_id : “mary” username: “mary” firstName: “Momo” games [ …..] }

Player

mary

username

firstName

“mary”

“Momo”

Games{(game: Game:2345 , opponent : Player: rick) , (game: Game: 2611 , opponent: Player: ann)}

Conclusion

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Application Object

How to change

Conclusion

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Application Object

NoAM

Question

Question 2: The implementation of a NoAM database in DynamoDB, what id is used as a DynamoDB primary key in the table?

A. Entry key

B. Block key

C. Collection name

D. Entry value

E. None of above is correct

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THANK YOU !