The document discusses DynamoDB, Amazon's key-value and document database that delivers single-digit millisecond performance at any scale. It provides an overview of DynamoDB, including its features like automatic scaling of throughput capacity and storage as demand increases. The document also covers DynamoDB data modeling concepts like primary keys, secondary indexes and global secondary indexes to help with query and access patterns.

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2018.10.02
DynamoDB

2. © 2018, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
対象者
• Amazon DynamoDB を初めて触るアプリケーション開発者
• AWSの知識は問いません
※ 上級者向けに Advanced Design Pattern セッション (11/1 16:20～ ) もございます
ゴール
• DynamoDBをマネジメントコンソールから操作できるようになる
• DynamoDBをアプリケーション(SDK/CLI)から操作できるようになる
• 要件から適切なキーとインデックスを設計できるようになる
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3. © 2018, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
1. はじめに
i. 事前に準備すべきもの
ii. 共有事項
2. NoSQLとは
i. SQLとNoSQL比較
ii. NoSQLの種類
iii. AWSのNoSQLサービス
3. DynamoDB概要
i. 特徴
ii. ユースケース
iii. ハンズオン１
4. データ操作方法
i. API
ii. AWS SDKs and CLI
iii. ハンズオン２
5. テーブル設計
i. Key
ii. Index
iii. ハンズオン３,４
6. まとめ
i. 本日のまとめ
ii. ハンズオンリソース削除
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２．NoSQLとは

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NoSQL
NoSQL 8
NoSQL
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• JSON
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NoSQLSQL
URL
https://aws.amazon.com/jp/nosql/

10. © 2018, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
JSON XML
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DB

11. © 2018, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
https://aws.amazon.com/jp/dynamodbhttps://aws.amazon.com/jp/elastica
che
https://aws.amazon.com/jp/neptune
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https://aws.amazon.com/jp/elasticsearch-service

12. © 2018, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
３．Amazon DynamoDB 概要

13. © 2018, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
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14. © 2018, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
Amazon が提供する高い信頼性、スケーラビリティ、低レイテンシ
で安定した性能を兼ね備えた NoSQL データベースサービス
① 管理不要で信頼性が高い
② プロビジョンドスループット
③ ストレージの容量制限がない
参考資料:
Amazon DynamoDB : https://aws.amazon.com/jp/dynamodb
Amazon DynamoDB ドキュメント: https://aws.amazon.com/jp/documentation/dynamodb/
クラウドサービス活用資料集: https://aws.amazon.com/jp/aws-jp-introduction/
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18. © 2018, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
KVS
SDK 2
AD TECH
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•
•
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IoT
•
• Amazon Redshift Amazon QuickSight
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19. © 2018, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
パーティションキー ソートキー
name/value 型、JSON 型等
item間で不揃いな構成も可能
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項目
(items)
属性 (attributes)テーブル

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UName
( )
Date
( )
Path
( )
TotalCount
( )
Ohba 2018-10-25
09:00:23
./images/9618.jpg 0
Ohba 2018-10-26
15:12:30
./images/5151.jpg 0
Uehara 2018-10-25
09:00:23
./images/1904.jpg 0
Uehara 2018-10-25
10:11:11
./images/2032.jpg 10
Uehara 2018-10-26
12:55:25
./images/2448.jpg 2
Partition
Key
Sort Key
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:
Amazon DynamoDB : https://aws.amazon.com/jp/getting-started/tutorials/create-nosql-table/

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API
SDK
Database
ClientSideServiceSide
Client application
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CreateTable
DescribeTable
ListTables
UpdateTable
DeleteTable
PutItem
BatchWriteItem
GetItem
BatchGetItem
Query
Scan
UpdateItem 1
DeleteItem
DynamoDB
ListStreams
DescribeStream
GetShardIterator
GetRecords
1
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Java Python PHP .NET Ruby nodeJS
iOS Android
Javascript
in the Browser AWS CLI
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http://aws.amazon.com/jp/dynamodb/developer-resources/
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DynamoDB


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
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• IAM
• demo1.html producer1.js
• ListTables PutItem GetItem UpdateItem DeleteItem
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• ListTables Query UpdateItem
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:
AWS SDK for JavaScript: https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/DynamoDB.html

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AWS
( )
全操作可能
IAM
EC2
S3
IAM
管理者グルー
プ
開発グループ
運用グループS3参照
だけ
S3は
すべて
操作可能
全操作
可能
•
•

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1 1
Key-Value
1
RDBMS

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テーブル
項目
(items)
属性
(attributes)
パーティションキー
(必須)
ソートキー
（オプション）
スキーマなし
1:Nモデルのリレーションシップ
豊富なQueryをサポート
同じパーティションキー内でソート
キーバリュー型のアクセスを実現
パーティショニングに利用される
==, <, >, >=,<=
“begins with”
“between”
sorted results
counts
先頭/末尾 N件
ページ単位出力
パーティションキー + ソートキー(オプション) = プライマリキー
name/value 型、JSON 型等
item間で不揃いであっても問題
ない
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40. © 2018, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
Partition Table
55 A954 AA FF
Partition Key は単体でプライマリキーとして利用
順序を指定しないハッシュインデックスを構築するためのキー
テーブルは、性能を確保するために分割（パーティショニング）される場合あり
00 FF
Id = 1
Name = Jim
Partition (1) = 7B
Id = 2
Name = Andy
Dept = Engg
Partition (2) = 48
Id = 3
Name = Kim
Dept = Ops
Partition (3) = CD
Key Space
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41. © 2018, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
パーティション はDynamoDB のデータを保存するストレージの割り当て
パーティショニングはパーティション（＝格納場所）を分割すること
パーティショニングの効果
• 項目取得する際の読み取り量削減
• 並列処理を可能とし、データ増加に関わらず性能を維持
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42. © 2018, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
Partition Table
55 A954 AA FF
Partition Key は単体でプライマリキーとして利用
順序を指定しないハッシュインデックスを構築するためのキー
テーブルは、性能を確保するために分割（パーティショニング）される場合あり
00 FF
Id = 1
Name = Jim
Partition (1) = 7B
Id = 2
Name = Andy
Dept = Engg
Partition (2) = 48
Id = 3
Name = Kim
Dept = Ops
Partition (3) = CD
Key Space
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確認ポイント
• 単体でPrimaryKeyとする為には 項目が一意となることが必須
• 特定のPartition Key にアクセスが偏らないことも重要

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Partition-Sort Table
Partition + Sortでプライマリキーとすることもできる
同一のPartition Keyでのデータの並びを保証するためにSort Keyが使われる
Customer# = 2
Order# = 10
Item = Pen
Customer# = 2
Order# = 11
Item = Shoes
Customer# = 1
Order# = 10
Item = Toy
Customer# = 1
Order# = 11
Item = Boots
Customer# = 3
Order# = 10
Item = Book
Customer# = 3
Order# = 11
Item = Paper
Partition 1 Partition 2 Partition 3
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確認ポイント
• 順序の保証が必要な場合にはSort Key を使用
• Partition Key で十分に項目を絞ることが可能
• Partition Key ＋ Sort Key で項目が一意となる

44. © 2018, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
A1
(PK)
A3
(Sort)
A2
(table key)
A1
(PK)
A2
(Sort)
A3 A4 A5
LSIs A1
(PK)
A4
(Sort)
A2
(table key)
A3
(projected)
Table
KEYS_ONLY
INCLUDE A3
A1
(PK)
A5
(Sort)
A2
(table key)
A3
(projected)
A4
(projected)
ALL
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45. © 2018, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
A1
(PK)
A2 A3 A4 A5
GSIs A5
(PK)
A4
(Sort)
A1
(table key)
A3
(projected)
Table
INCLUDE A3
A4
(PK)
A5
(Sort)
A1
(table key)
A2
(projected)
A3
(projected)
ALL
A2
(PK)
A1
(table key)
KEYS_ONLY
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UName Date Path Total
Count
Ohba 2018-10-25
09:00:23
./images/9618.jpg 0
Ohba 2018-10-26
15:12:30
./images/5151.jpg 0
Uehara 2018-10-25
09:00:23
./images/1904.jpg 0
Uehara 2018-10-25
10:11:11
./images/2032.jpg 10
Uehara 2018-10-26
12:55:25
./images/2448.jpg 2
Scan

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Path Date UName Total
Count
./images/9618.jpg 2018-10-25
09:00:23
Ohba 0
./images/5151.jpg 2018-10-26
15:12:30
Ohba 0
./images/1904.jpg 2018-10-25
09:00:23
Uehara 0
./images/2032.jpg 2018-10-25
10:11:11
Uehara 10
./images/2448.jpg 2018-10-26
12:55:25
Uehara 2
Path Partition Key

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RDB

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[Best Picture]をクリックする
とTotalCount順に表示される

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1.
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asset

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SDK
DynamoDB
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