SlideShare a Scribd company logo

Dynamodb tutorial

H
HarikaReddy115

The document is a comprehensive tutorial on Amazon DynamoDB, a fully-managed NoSQL database service designed for scalability and performance. It provides an overview of key concepts, operations, and best practices for IT professionals and students looking to become proficient in DynamoDB, while also addressing prerequisites and potential limitations. The tutorial includes detailed sections on creating tables, querying, managing data, and various operations using different programming languages.

Education
1 of 20
Download to read offline
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Dynamodb tutorial
DynamoDB i AbouttheTutorial DynamoDB is a fully-managed NoSQL database service designed to deliver fast and predictable performance. It uses the Dynamo model in the essence of its design, and improves those features. It began as a way to manage website scalability challenges presented by the holiday season load. This tutorial introduces you to key DynamoDB concepts necessary for creating and deploying a highly-scalable and performance-focused database. Audience This tutorial targets IT professionals, students, and management professionals who want a solid grasp of essential DynamoDB concepts. After completing this tutorial, you will achieve intermediate expertise in DynamoDB, and easily build on your knowledge to solve more challenging problems. Prerequisites This tutorial assumes general knowledge of database technology, programming, Java or Java-like programming languages, and querying languages. It also assumes familiarity with typical database operations in an application. CopyrightandDisclaimer  Copyright 2016 by Tutorials Point (I) Pvt. Ltd. All the content and graphics published in this e-book are the property of Tutorials Point (I) Pvt. Ltd. The user of this e-book is prohibited to reuse, retain, copy, distribute or republish any contents or a part of contents of this e-book in any manner without written consent of the publisher. We strive to update the contents of our website and tutorials as timely and as precisely as possible, however, the contents may contain inaccuracies or errors. Tutorials Point (I) Pvt. Ltd. provides no guarantee regarding the accuracy, timeliness or completeness of our website or its contents including this tutorial. If you discover any errors on our website or in this tutorial, do notify us at contact@tutorialspoint.com
DynamoDB ii TableofContents About the Tutorial....................................................................................................................................i Audience..................................................................................................................................................i Prerequisites............................................................................................................................................i Copyright and Disclaimer .........................................................................................................................i Table of Contents....................................................................................................................................ii 1. DYNAMODB – OVERVIEW....................................................................................................1 DynamoDB vs. RDBMS ............................................................................................................................1 2. DYNAMODB – BASIC CONCEPTS..........................................................................................3 Primary Key.............................................................................................................................................3 Secondary Indexes ..................................................................................................................................3 Provisioned Throughput..........................................................................................................................4 Read Consistency ....................................................................................................................................4 Partitions ................................................................................................................................................5 3. DYNAMODB – ENVIRONMENT.............................................................................................6 Local Install .............................................................................................................................................6 Working Environment.............................................................................................................................7 4. DYNAMODB – OPERATIONS TOOLS.....................................................................................8 GUI Console ............................................................................................................................................8 The JavaScript Shell.................................................................................................................................9 5. DYNAMODB – DATA TYPES................................................................................................10 Attribute Data Types.............................................................................................................................10 6. DYNAMODB – CREATE TABLE ............................................................................................12 Create Table using.................................................................................................................................12 the GUI Console ....................................................................................................................................12
DynamoDB iii Create Table using.................................................................................................................................13 Java.......................................................................................................................................................13 7. DYNAMODB – LOAD TABLE ...............................................................................................16 Load Table using....................................................................................................................................16 GUI Console ..........................................................................................................................................16 Load Table using....................................................................................................................................16 Java.......................................................................................................................................................16 8. DYNAMODB – QUERY TABLE .............................................................................................20 Query Table using .................................................................................................................................20 the GUI Console ....................................................................................................................................20 Query Table using .................................................................................................................................21 Java.......................................................................................................................................................21 9. DYNAMODB – DELETE TABLE.............................................................................................25 Delete Table using.................................................................................................................................25 the GUI Console ....................................................................................................................................25 Delete Table using.................................................................................................................................26 Java.......................................................................................................................................................26 10. DYNAMODB – API INTERFACE ...........................................................................................27 Manipulate Tables ................................................................................................................................27 Read Data .............................................................................................................................................27 Modify Data ..........................................................................................................................................28 11. DYNAMODB – CREATING ITEMS........................................................................................29 How to Create an Item Using the GUI Console?.....................................................................................29 How to Use Java in Item Creation?........................................................................................................32
DynamoDB iv 12. DYNAMODB – GETTING ITEMS..........................................................................................36 Retrieve an Item....................................................................................................................................36 Item Retrieval Using Java ......................................................................................................................36 13. DYNAMODB – UPDATE ITEMS ...........................................................................................40 How to Update Items Using GUI Tools?.................................................................................................40 Update Items Using Java .......................................................................................................................41 Update Items Using Counters................................................................................................................42 14. DYNAMODB – DELETE ITEMS.............................................................................................46 Delete Items Using the GUI Console......................................................................................................46 How to Delete Items Using Java? ..........................................................................................................47 15. DYNAMODB – BATCH WRITING.........................................................................................52 What is Batch Writing?..........................................................................................................................52 Batch Writes with Java..........................................................................................................................52 16. DYNAMODB – BATCH RETRIEVE ........................................................................................56 Batch Retrievals with Java.....................................................................................................................56 17. DYNAMODB – QUERYING..................................................................................................60 Querying with Java................................................................................................................................61 18. DYNAMODB – SCAN ..........................................................................................................64 Types of Scan Operations......................................................................................................................64 Parallel Scan..........................................................................................................................................65 19. DYNAMODB – INDEXES......................................................................................................67
DynamoDB v 20. DYNAMODB – GLOBAL SECONDARY INDEXES....................................................................70 Attribute Projections.............................................................................................................................70 Global Secondary Index Queries and Scans ...........................................................................................71 Global Secondary Index Storage............................................................................................................72 Using Java to Work with Global Secondary Indexes ..............................................................................73 21. DYNAMODB – LOCAL SECONDARY INDEXES ......................................................................82 Projecting an Attribute..........................................................................................................................82 Local Secondary Index Creation.............................................................................................................83 Using Java to Work with Local Secondary Indexes.................................................................................84 22. DYNAMODB – AGGREGATION ...........................................................................................95 23. DYNAMODB – ACCESS CONTROL.......................................................................................96 Types of Permissions.............................................................................................................................96 Granting Privileges: Using The Shell ......................................................................................................99 24. DYNAMODB – PERMISSIONS API .....................................................................................102 Permissions and API Actions ...............................................................................................................102 25. DYNAMODB – CONDITIONS.............................................................................................105 Detailed Control..................................................................................................................................105 26. DYNAMODB – WEB IDENTITY FEDERATION.....................................................................107 27. DYNAMODB – DATA PIPELINE .........................................................................................108 Using Data Pipeline .............................................................................................................................108 28. DYNAMODB – DATA BACKUP ..........................................................................................109 Exporting and Importing Data .............................................................................................................109 Importing Data....................................................................................................................................109 Errors ..................................................................................................................................................110
DynamoDB vi 29. DYNAMODB – MONITORING...........................................................................................111 Cloudwatch Console............................................................................................................................111 API Integration....................................................................................................................................111 30. DYNAMODB – CLOUDTRAIL.............................................................................................113 31. DYNAMODB – MAPREDUCE.............................................................................................116 Hive Setup...........................................................................................................................................116 Activate SSH Session ...........................................................................................................................117 32. DYNAMODB – TABLE ACTIVITY ........................................................................................119 Managing Streams ..............................................................................................................................119 33. DYNAMODB – ERROR HANDLING ....................................................................................126 Codes and Messages ...........................................................................................................................126 34. DYNAMODB – BEST PRACTICES .......................................................................................129 Tables..................................................................................................................................................129 Items...................................................................................................................................................129 Queries and Scans...............................................................................................................................129 Local Secondary Indices.......................................................................................................................130 Global Secondary Indices ....................................................................................................................130 35. DYNAMODB – USEFUL RESOURCES .................................................................................131
DynamoDB 7 DynamoDB allows users to create databases capable of storing and retrieving any amount of data, and serving any amount of traffic. It automatically distributes data and traffic over servers to dynamically manage each customer's requests, and also maintains fast performance. DynamoDBvs.RDBMS DynamoDB uses a NoSQL model, which means it uses a non-relational system. The following table highlights the differences between DynamoDB and RDBMS: Common Tasks RDBMS DynamoDB Connect to the Source It uses a persistent connection and SQL commands. It uses HTTP requests and API operations. Create a Table Its fundamental structures are tables, and must be defined. It only uses primary keys, and no schema on creation. It uses various data sources. Get Table Info All table info remains accessible. Only primary keys are revealed. Load Table Data It uses rows made of columns. In tables, it uses items made of attributes. Read Table Data It uses SELECT statements and filtering statements. It uses GetItem, Query, and Scan. Manage Indexes It uses standard indexes created through SQL statements. Modifications to it occur automatically on table changes. It uses a secondary index to achieve the same function. It requires specifications (partition key and sort key). Modify Table Data It uses an UPDATE statement. It uses an UpdateItem operation. Delete Table Data It uses a DELETE statement. It uses a DeleteItem operation. Delete a Table It uses a DROP TABLE statement. It uses a DeleteTable operation. Advantages 1. DynamoDB – Overview
DynamoDB 8 The two main advantages of DynamoDB are scalability and flexibility. It does not force the use of a particular data source and structure, allowing users to work with virtually anything, but in a uniform way. Its design also supports a wide range of use from lighter tasks and operations to demanding enterprise functionality. It also allows simple use of multiple languages: Ruby, Java, Python, C#, Erlang, PHP, and Perl. Limitations DynamoDB does suffer from certain limitations, however, these limitations do not necessarily create huge problems or hinder solid development. You can review them from the following points:  Capacity Unit Sizes – A read capacity unit is a single consistent read per second for items no larger than 4KB. A write capacity unit is a single write per second for items no bigger than 1KB.  Provisioned Throughput Min/Max – All tables and global secondary indices have a minimum of one read and one write capacity unit. Maximums depend on region. In the US, 40K read and write remains the cap per table (80K per account), and other regions have a cap of 10K per table with a 20K account cap.  Provisioned Throughput Increase and Decrease – You can increase this as often as needed, but decreases remain limited to no more than four times daily per table.  Table Size and Quantity Per Account – Table sizes have no limits, but accounts have a 256 table limit unless you request a higher cap.  Secondary Indexes Per Table – Five local and five global are permitted.  Projected Secondary Index Attributes Per Table – DynamoDB allows 20 attributes.  Partition Key Length and Values – Their minimum length sits at 1 byte, and maximum at 2048 bytes, however, DynamoDB places no limit on values.  Sort Key Length and Values – Its minimum length stands at 1 byte, and maximum at 1024 bytes, with no limit for values unless its table uses a local secondary index.  Table and Secondary Index Names – Names must conform to a minimum of 3 characters in length, and a maximum of 255. They use the following characters: A-Z, a-z, 0-9, “_”, “-”, and “.”.  Attribute Names – One character remains the minimum, and 64KB the maximum, with exceptions for keys and certain attributes.  Reserved Words – DynamoDB does not prevent the use of reserved words as names.  Expression Length – Expression strings have a 4KB limit. Attribute expressions have a 255-byte limit. Substitution variables of an expression have a 2MB limit.
DynamoDB 9 Before using DynamoDB, you must familiarize yourself with its basic components and ecosystem. In the DynamoDB ecosystem, you work with tables, attributes, and items. A table holds sets of items, and items hold sets of attributes. An attribute is a fundamental element of data requiring no further decomposition, i.e., a field. PrimaryKey The Primary Keys serve as the means of unique identification for table items, and secondary indexes provide query flexibility. DynamoDB streams record events by modifying the table data. The Table Creation requires not only setting a name, but also the primary key; which identifies table items. No two items share a key. DynamoDB uses two types of primary keys:  Partition Key – This simple primary key consists of a single attribute referred to as the “partition key.” Internally, DynamoDB uses the key value as input for a hash function to determine storage.  Partition Key and Sort Key – This key, known as the “Composite Primary Key”, consists of two attributes: o The partition key and o The sort key. DynamoDB applies the first attribute to a hash function, and stores items with the same partition key together; with their order determined by the sort key. Items can share partition keys, but not sort keys. The Primary Key attributes only allow scalar (single) values; and string, number, or binary data types. The non-key attributes do not have these constraints. SecondaryIndexes These indexes allow you to query table data with an alternate key. Though DynamoDB does not force their use, they optimize querying. DynamoDB uses two types of secondary indexes:  Global Secondary Index – This index possesses partition and sort keys, which can differ from table keys.  Local Secondary Index – This index possesses a partition key identical to the table, however, its sort key differs. 2. DynamoDB – Basic Concepts
DynamoDB 10 API The API operations offered by DynamoDB include those of the control plane, data plane (e.g., creation, reading, updating, and deleting), and streams. In control plane operations, you create and manage tables with the following tools:  CreateTable  DescribeTable  ListTables  UpdateTable  DeleteTable In the data plane, you perform CRUD operations with the following tools: Create Read Update Delete PutItem BatchWriteItem GetItem BatchGetItem Query Scan UpdateItem DeleteItem BatchWriteItem The stream operations control table streams. You can review the following stream tools:  ListStreams  DescribeStream  GetShardIterator  GetRecords ProvisionedThroughput In table creation, you specify provisioned throughput, which reserves resources for reads and writes. You use capacity units to measure and set throughput. When applications exceed the set throughput, requests fail. The DynamoDB GUI console allows monitoring of set and used throughput for better and dynamic provisioning. ReadConsistency DynamoDB uses eventually consistent and strongly consistent reads to support dynamic application needs. Eventually consistent reads do not always deliver current data. The strongly consistent reads always deliver current data (with the exception of equipment failure or network problems). Eventually consistent reads serve as the default setting, requiring a setting of true in the ConsistentRead parameter to change it.
DynamoDB 11 Partitions DynamoDB uses partitions for data storage. These storage allocations for tables have SSD backing and automatically replicate across zones. DynamoDB manages all the partition tasks, requiring no user involvement. In table creation, the table enters the CREATING state, which allocates partitions. When it reaches ACTIVE state, you can perform operations. The system alters partitions when its capacity reaches maximum or when you change throughput.
DynamoDB 12 The DynamoDB Environment only consists of using your Amazon Web Services account to access the DynamoDB GUI console, however, you can also perform a local install. Navigate to the following website: https://aws.amazon.com/dynamodb/ Click the “Get Started with Amazon DynamoDB” button, or the “Create an AWS Account” button if you do not have an Amazon Web Services account. The simple, guided process will inform you of all the related fees and requirements. After performing all the necessary steps of the process, you will have the access. Simply sign in to the AWS console, and then navigate to the DynamoDB console. Be sure to delete unused or unnecessary material to avoid associated fees. LocalInstall The AWS (Amazon Web Service) provides a version of DynamoDB for local installations. It supports creating applications without the web service or a connection. It also reduces provisioned throughput, data storage, and transfer fees by allowing a local database. This guide assumes a local install. When ready for deployment, you can make a few small adjustments to your application to convert it to AWS use. The install file is a .jar executable. It runs in Linux, Unix, Windows, and any other OS with Java support. Download the file by using one of the following links:  Tarball – http://dynamodb-local.s3-website-us-west- 2.amazonaws.com/dynamodb_local_latest.tar.gz  Zip archive – http://dynamodb-local.s3-website-us-west- 2.amazonaws.com/dynamodb_local_latest.zip Note: Other repositories offer the file, but not necessarily the latest version. Use the links above for up-to-date install files. Also, ensure you have Java Runtime Engine (JRE) version 6.x or a newer version. DynamoDB cannot run with older versions. After downloading the appropriate archive, extract its directory (DynamoDBLocal.jar) and place it in the desired location. You can then start DynamoDB by opening a command prompt, navigating to the directory containing DynamoDBLocal.jar, and entering the following command: java -Djava.library.path=./DynamoDBLocal_lib -jar DynamoDBLocal.jar -sharedDb You can also stop the DynamoDB by closing the command prompt used to start it. 3. DynamoDB – Environment
DynamoDB 13 WorkingEnvironment You can use a JavaScript shell, a GUI console, and multiple languages to work with DynamoDB. The languages available include Ruby, Java, Python, C#, Erlang, PHP, and Perl. In this tutorial, we use Java and GUI console examples for conceptual and code clarity. Install a Java IDE, the AWS SDK for Java, and setup AWS security credentials for the Java SDK in order to utilize Java. Conversion from Local to Web Service Code When ready for deployment, you will need to alter your code. The adjustments depend on code language and other factors. The main change merely consists of changing the endpoint from a local point to an AWS region. Other changes require deeper analysis of your application. A local install differs from the web service in many ways including, but not limited to the following key differences:  The local install creates tables immediately, but the service takes much longer.  The local install ignores throughput.  The deletion occurs immediately in a local install.  The reads/writes occur quickly in local installs due to the absence of network overhead.
DynamoDB 14 DynamoDB provides three options for performing operations: a web-based GUI console, a JavaScript shell, and a programming language of your choice. In this tutorial, we will focus on using the GUI console and Java language for clarity and conceptual understanding. GUIConsole The GUI console or the AWS Management Console for Amazon DynamoDB can be found at the following address: https://console.aws.amazon.com/dynamodb/home It allows you to perform the following tasks:  CRUD  View Table Items  Perform Table Queries  Set Alarms for Table Capacity Monitoring  View Table Metrics in Real-Time  View Table Alarms 4. DynamoDB – Operations Tools
DynamoDB 15 If your DynamoDB account has no tables, on access, it guides you through creating a table. Its main screen offers three shortcuts for performing common operations:  Create Tables  Add and Query Tables  Monitor and Manage Tables TheJavaScriptShell DynamoDB includes an interactive JavaScript shell. The shell runs inside a web browser, and the recommended browsers include Firefox and Chrome.
DynamoDB 16 Note: Using other browsers may result in errors. Access the shell by opening a web browser and entering the following address: http://localhost:8000/shell Use the shell by entering JavaScript in the left pane, and clicking the “Play” icon button in the top right corner of the left pane, which runs the code. The code results display in the right pane. DynamoDB and Java Use Java with DynamoDB by utilizing your Java development environment. Operations confirm to normal Java syntax and structure.
DynamoDB 17 Data types supported by DynamoDB include those specific to attributes, actions, and your coding language of choice. AttributeDataTypes DynamoDB supports a large set of data types for table attributes. Each data type falls into one of the three following categories:  Scalar – These types represent a single value, and include number, string, binary, Boolean, and null.  Document – These types represent a complex structure possessing nested attributes, and include lists and maps.  Set – These types represent multiple scalars, and include string sets, number sets, and binary sets. Remember DynamoDB as a schemaless, NoSQL database that does not need attribute or data type definitions when creating a table. It only requires a primary key attribute data types in contrast to RDBMS, which require column data types on table creation. Scalars  Numbers – They are limited to 38 digits, and are either positive, negative, or zero.  String – They are Unicode using UTF-8, with a minimum length of >0 and maximum of 400KB.  Binary – They store any binary data, e.g., encrypted data, images, and compressed text. DynamoDB views its bytes as unsigned.  Boolean – They store true or false.  Null – They represent an unknown or undefined state. Document  List – It stores ordered value collections, and uses square ([...]) brackets.  Map – It stores unordered name-value pair collections, and uses curly ({...}) braces. 5. DynamoDB – Data Types
DynamoDB 18 Set Sets must contain elements of the same type whether number, string, or binary. The only limits placed on sets consist of the 400KB item size limit, and each element being unique. Action Data Types DynamoDB API holds various data types used by actions. You can review a selection of the following key types:  AttributeDefinition – It represents key table and index schema.  Capacity – It represents the quantity of throughput consumed by a table or index.  CreateGlobalSecondaryIndexAction – It represents a new global secondary index added to a table.  LocalSecondaryIndex – It represents local secondary index properties.  ProvisionedThroughput – It represents the provisioned throughput for an index or table.  PutRequest – It represents PutItem requests.  TableDescription – It represents table properties. Supported Java Datatypes DynamoDB provides support for primitive data types, Set collections, and arbitrary types for Java.
DynamoDB 19 End of ebook preview If you liked what you saw… Buy it from our store @ https://store.tutorialspoint.com

More Related Content

Similar to Dynamodb tutorial (20)

PDF
Amazon DynamoDB
Kriti Katyayan
 
PPTX
Dynamo db
Parag Patil
 
PPTX
MongoDB Database With Docker.pptx MongoDB Database With Docker.pptx
pateljeel24
 
PPTX
DynamoDB Database Integration.pptx it's dynamodb databse related stufs
yashconestoga
 
PPTX
Dynamo vs Mongo
Amar Das
 
PPTX
Compare DynamoDB vs. MongoDB
Amar Das
 
PDF
AWS DYNAMODB TWO CASE STUDIES.pdf
hayhadiabbas
 
PDF
AWS DynamoDB
Suman Debnath
 
PDF
Deep Dive into DynamoDB
AWS Germany
 
PDF
DynamoDB Deep Dive
Amazon Web Services LATAM
 
PPSX
Dynamo DB
Mohit Sorde
 
PPTX
Introduction to aws dynamo db
Omid Vahdaty
 
PDF
Amazon DynamoDB by Aswin
Agate Studio
 
PPTX
The Rise Of Scanamo: Async Access For DynamoDB In Scala
Knoldus Inc.
 
PPT
CO3-Session-6(AmazonDynamoDB).ppt
AbhignaReddy30
 
PDF
Amazon DynamoDB - Use Cases and Cost Optimization - 발표자: 이혁, DynamoDB Special...
Amazon Web Services Korea
 
PDF
DynamoDB Cost Optimization Considerations and Strategies by Alex DeBrie
ScyllaDB
 
PDF
DynamoDB Cost Optimization Masterclass: Deep Dive on DynamoDB Pricing
ScyllaDB
 
PDF
2017 AWS DB Day | Amazon DynamoDB 서비스, 개요 및 신규 기능 소개
Amazon Web Services Korea
 
ODP
The Rise of Scanamo: Async Access for DynamoDB in Scala
Knoldus Inc.
 
Amazon DynamoDB
Kriti Katyayan
 
Dynamo db
Parag Patil
 
MongoDB Database With Docker.pptx MongoDB Database With Docker.pptx
pateljeel24
 
DynamoDB Database Integration.pptx it's dynamodb databse related stufs
yashconestoga
 
Dynamo vs Mongo
Amar Das
 
Compare DynamoDB vs. MongoDB
Amar Das
 
AWS DYNAMODB TWO CASE STUDIES.pdf
hayhadiabbas
 
AWS DynamoDB
Suman Debnath
 
Deep Dive into DynamoDB
AWS Germany
 
DynamoDB Deep Dive
Amazon Web Services LATAM
 
Dynamo DB
Mohit Sorde
 
Introduction to aws dynamo db
Omid Vahdaty
 
Amazon DynamoDB by Aswin
Agate Studio
 
The Rise Of Scanamo: Async Access For DynamoDB In Scala
Knoldus Inc.
 
CO3-Session-6(AmazonDynamoDB).ppt
AbhignaReddy30
 
Amazon DynamoDB - Use Cases and Cost Optimization - 발표자: 이혁, DynamoDB Special...
Amazon Web Services Korea
 
DynamoDB Cost Optimization Considerations and Strategies by Alex DeBrie
ScyllaDB
 
DynamoDB Cost Optimization Masterclass: Deep Dive on DynamoDB Pricing
ScyllaDB
 
2017 AWS DB Day | Amazon DynamoDB 서비스, 개요 및 신규 기능 소개
Amazon Web Services Korea
 
The Rise of Scanamo: Async Access for DynamoDB in Scala
Knoldus Inc.
 

More from HarikaReddy115 (20)

PDF
Dbms tutorial
HarikaReddy115
 
PDF
Data structures algorithms_tutorial
HarikaReddy115
 
PDF
Wireless communication tutorial
HarikaReddy115
 
PDF
Cryptography tutorial
HarikaReddy115
 
PDF
Cosmology tutorial
HarikaReddy115
 
PDF
Control systems tutorial
HarikaReddy115
 
PDF
Computer logical organization_tutorial
HarikaReddy115
 
PDF
Computer fundamentals tutorial
HarikaReddy115
 
PDF
Compiler design tutorial
HarikaReddy115
 
PDF
Communication technologies tutorial
HarikaReddy115
 
PDF
Biometrics tutorial
HarikaReddy115
 
PDF
Behavior driven development_tutorial
HarikaReddy115
 
PDF
Basics of computers_tutorial
HarikaReddy115
 
PDF
Basics of computer_science_tutorial
HarikaReddy115
 
PDF
Basic electronics tutorial
HarikaReddy115
 
PDF
Auditing tutorial
HarikaReddy115
 
PDF
Artificial neural network_tutorial
HarikaReddy115
 
PDF
Artificial intelligence tutorial
HarikaReddy115
 
PDF
Antenna theory tutorial
HarikaReddy115
 
PDF
Analog communication tutorial
HarikaReddy115
 
Dbms tutorial
HarikaReddy115
 
Data structures algorithms_tutorial
HarikaReddy115
 
Wireless communication tutorial
HarikaReddy115
 
Cryptography tutorial
HarikaReddy115
 
Cosmology tutorial
HarikaReddy115
 
Control systems tutorial
HarikaReddy115
 
Computer logical organization_tutorial
HarikaReddy115
 
Computer fundamentals tutorial
HarikaReddy115
 
Compiler design tutorial
HarikaReddy115
 
Communication technologies tutorial
HarikaReddy115
 
Biometrics tutorial
HarikaReddy115
 
Behavior driven development_tutorial
HarikaReddy115
 
Basics of computers_tutorial
HarikaReddy115
 
Basics of computer_science_tutorial
HarikaReddy115
 
Basic electronics tutorial
HarikaReddy115
 
Auditing tutorial
HarikaReddy115
 
Artificial neural network_tutorial
HarikaReddy115
 
Artificial intelligence tutorial
HarikaReddy115
 
Antenna theory tutorial
HarikaReddy115
 
Analog communication tutorial
HarikaReddy115
 
Ad

Recently uploaded (20)

PPTX
How to Define Translation to Custom Module And Add a new language in Odoo 18
Celine George
 
PPTX
A PPT on Alfred Lord Tennyson's Ulysses.
Beena E S
 
PPTX
Optimizing Cancer Screening With MCED Technologies: From Science to Practical...
i3 Health
 
PPTX
Latest Features in Odoo 18 - Odoo slides
Celine George
 
PDF
DIGESTION OF CARBOHYDRATES,PROTEINS,LIPIDS
raviralanaresh2
 
PPTX
How to Configure Storno Accounting in Odoo 18 Accounting
Celine George
 
PDF
IMP NAAC-Reforms-Stakeholder-Consultation-Presentation-on-Draft-Metrics-Unive...
BHARTIWADEKAR
 
PPTX
Optimizing Cancer Screening With MCED Technologies: From Science to Practical...
i3 Health
 
PPTX
Pyhton with Mysql to perform CRUD operations.pptx
Ramakrishna Reddy Bijjam
 
PDF
community health nursing question paper 2.pdf
Prince kumar
 
PPTX
HEAD INJURY IN CHILDREN: NURSING MANAGEMENGT.pptx
PRADEEP ABOTHU
 
PDF
1, 2, 3… E MAIS UM CICLO CHEGA AO FIM!.pdf
Colégio Santa Teresinha
 
PPTX
Explorando Recursos do Summer '25: Dicas Essenciais - 02
Mauricio Alexandre Silva
 
PPTX
How to Create Rental Orders in Odoo 18 Rental
Celine George
 
PPSX
Health Planning in india - Unit 03 - CHN 2 - GNM 3RD YEAR.ppsx
Priyanshu Anand
 
PPTX
Nutri-QUIZ-Bee-Elementary.pptx...................
ferdinandsanbuenaven
 
PDF
CEREBRAL PALSY: NURSING MANAGEMENT .pdf
PRADEEP ABOTHU
 
PPTX
2025 Winter SWAYAM NPTEL & A Student.pptx
Utsav Yagnik
 
PPTX
Unit 2 COMMERCIAL BANKING, Corporate banking.pptx
AnubalaSuresh1
 
PDF
CONCURSO DE POESIA “POETUFAS – PASSOS SUAVES PELO VERSO.pdf
Colégio Santa Teresinha
 
How to Define Translation to Custom Module And Add a new language in Odoo 18
Celine George
 
A PPT on Alfred Lord Tennyson's Ulysses.
Beena E S
 
Optimizing Cancer Screening With MCED Technologies: From Science to Practical...
i3 Health
 
Latest Features in Odoo 18 - Odoo slides
Celine George
 
DIGESTION OF CARBOHYDRATES,PROTEINS,LIPIDS
raviralanaresh2
 
How to Configure Storno Accounting in Odoo 18 Accounting
Celine George
 
IMP NAAC-Reforms-Stakeholder-Consultation-Presentation-on-Draft-Metrics-Unive...
BHARTIWADEKAR
 
Optimizing Cancer Screening With MCED Technologies: From Science to Practical...
i3 Health
 
Pyhton with Mysql to perform CRUD operations.pptx
Ramakrishna Reddy Bijjam
 
community health nursing question paper 2.pdf
Prince kumar
 
HEAD INJURY IN CHILDREN: NURSING MANAGEMENGT.pptx
PRADEEP ABOTHU
 
1, 2, 3… E MAIS UM CICLO CHEGA AO FIM!.pdf
Colégio Santa Teresinha
 
Explorando Recursos do Summer '25: Dicas Essenciais - 02
Mauricio Alexandre Silva
 
How to Create Rental Orders in Odoo 18 Rental
Celine George
 
Health Planning in india - Unit 03 - CHN 2 - GNM 3RD YEAR.ppsx
Priyanshu Anand
 
Nutri-QUIZ-Bee-Elementary.pptx...................
ferdinandsanbuenaven
 
CEREBRAL PALSY: NURSING MANAGEMENT .pdf
PRADEEP ABOTHU
 
2025 Winter SWAYAM NPTEL & A Student.pptx
Utsav Yagnik
 
Unit 2 COMMERCIAL BANKING, Corporate banking.pptx
AnubalaSuresh1
 
CONCURSO DE POESIA “POETUFAS – PASSOS SUAVES PELO VERSO.pdf
Colégio Santa Teresinha
 
Ad

Dynamodb tutorial

  • 2. DynamoDB i AbouttheTutorial DynamoDB is a fully-managed NoSQL database service designed to deliver fast and predictable performance. It uses the Dynamo model in the essence of its design, and improves those features. It began as a way to manage website scalability challenges presented by the holiday season load. This tutorial introduces you to key DynamoDB concepts necessary for creating and deploying a highly-scalable and performance-focused database. Audience This tutorial targets IT professionals, students, and management professionals who want a solid grasp of essential DynamoDB concepts. After completing this tutorial, you will achieve intermediate expertise in DynamoDB, and easily build on your knowledge to solve more challenging problems. Prerequisites This tutorial assumes general knowledge of database technology, programming, Java or Java-like programming languages, and querying languages. It also assumes familiarity with typical database operations in an application. CopyrightandDisclaimer  Copyright 2016 by Tutorials Point (I) Pvt. Ltd. All the content and graphics published in this e-book are the property of Tutorials Point (I) Pvt. Ltd. The user of this e-book is prohibited to reuse, retain, copy, distribute or republish any contents or a part of contents of this e-book in any manner without written consent of the publisher. We strive to update the contents of our website and tutorials as timely and as precisely as possible, however, the contents may contain inaccuracies or errors. Tutorials Point (I) Pvt. Ltd. provides no guarantee regarding the accuracy, timeliness or completeness of our website or its contents including this tutorial. If you discover any errors on our website or in this tutorial, do notify us at [email protected]
  • 3. DynamoDB ii TableofContents About the Tutorial....................................................................................................................................i Audience..................................................................................................................................................i Prerequisites............................................................................................................................................i Copyright and Disclaimer .........................................................................................................................i Table of Contents....................................................................................................................................ii 1. DYNAMODB – OVERVIEW....................................................................................................1 DynamoDB vs. RDBMS ............................................................................................................................1 2. DYNAMODB – BASIC CONCEPTS..........................................................................................3 Primary Key.............................................................................................................................................3 Secondary Indexes ..................................................................................................................................3 Provisioned Throughput..........................................................................................................................4 Read Consistency ....................................................................................................................................4 Partitions ................................................................................................................................................5 3. DYNAMODB – ENVIRONMENT.............................................................................................6 Local Install .............................................................................................................................................6 Working Environment.............................................................................................................................7 4. DYNAMODB – OPERATIONS TOOLS.....................................................................................8 GUI Console ............................................................................................................................................8 The JavaScript Shell.................................................................................................................................9 5. DYNAMODB – DATA TYPES................................................................................................10 Attribute Data Types.............................................................................................................................10 6. DYNAMODB – CREATE TABLE ............................................................................................12 Create Table using.................................................................................................................................12 the GUI Console ....................................................................................................................................12
  • 4. DynamoDB iii Create Table using.................................................................................................................................13 Java.......................................................................................................................................................13 7. DYNAMODB – LOAD TABLE ...............................................................................................16 Load Table using....................................................................................................................................16 GUI Console ..........................................................................................................................................16 Load Table using....................................................................................................................................16 Java.......................................................................................................................................................16 8. DYNAMODB – QUERY TABLE .............................................................................................20 Query Table using .................................................................................................................................20 the GUI Console ....................................................................................................................................20 Query Table using .................................................................................................................................21 Java.......................................................................................................................................................21 9. DYNAMODB – DELETE TABLE.............................................................................................25 Delete Table using.................................................................................................................................25 the GUI Console ....................................................................................................................................25 Delete Table using.................................................................................................................................26 Java.......................................................................................................................................................26 10. DYNAMODB – API INTERFACE ...........................................................................................27 Manipulate Tables ................................................................................................................................27 Read Data .............................................................................................................................................27 Modify Data ..........................................................................................................................................28 11. DYNAMODB – CREATING ITEMS........................................................................................29 How to Create an Item Using the GUI Console?.....................................................................................29 How to Use Java in Item Creation?........................................................................................................32
  • 5. DynamoDB iv 12. DYNAMODB – GETTING ITEMS..........................................................................................36 Retrieve an Item....................................................................................................................................36 Item Retrieval Using Java ......................................................................................................................36 13. DYNAMODB – UPDATE ITEMS ...........................................................................................40 How to Update Items Using GUI Tools?.................................................................................................40 Update Items Using Java .......................................................................................................................41 Update Items Using Counters................................................................................................................42 14. DYNAMODB – DELETE ITEMS.............................................................................................46 Delete Items Using the GUI Console......................................................................................................46 How to Delete Items Using Java? ..........................................................................................................47 15. DYNAMODB – BATCH WRITING.........................................................................................52 What is Batch Writing?..........................................................................................................................52 Batch Writes with Java..........................................................................................................................52 16. DYNAMODB – BATCH RETRIEVE ........................................................................................56 Batch Retrievals with Java.....................................................................................................................56 17. DYNAMODB – QUERYING..................................................................................................60 Querying with Java................................................................................................................................61 18. DYNAMODB – SCAN ..........................................................................................................64 Types of Scan Operations......................................................................................................................64 Parallel Scan..........................................................................................................................................65 19. DYNAMODB – INDEXES......................................................................................................67
  • 6. DynamoDB v 20. DYNAMODB – GLOBAL SECONDARY INDEXES....................................................................70 Attribute Projections.............................................................................................................................70 Global Secondary Index Queries and Scans ...........................................................................................71 Global Secondary Index Storage............................................................................................................72 Using Java to Work with Global Secondary Indexes ..............................................................................73 21. DYNAMODB – LOCAL SECONDARY INDEXES ......................................................................82 Projecting an Attribute..........................................................................................................................82 Local Secondary Index Creation.............................................................................................................83 Using Java to Work with Local Secondary Indexes.................................................................................84 22. DYNAMODB – AGGREGATION ...........................................................................................95 23. DYNAMODB – ACCESS CONTROL.......................................................................................96 Types of Permissions.............................................................................................................................96 Granting Privileges: Using The Shell ......................................................................................................99 24. DYNAMODB – PERMISSIONS API .....................................................................................102 Permissions and API Actions ...............................................................................................................102 25. DYNAMODB – CONDITIONS.............................................................................................105 Detailed Control..................................................................................................................................105 26. DYNAMODB – WEB IDENTITY FEDERATION.....................................................................107 27. DYNAMODB – DATA PIPELINE .........................................................................................108 Using Data Pipeline .............................................................................................................................108 28. DYNAMODB – DATA BACKUP ..........................................................................................109 Exporting and Importing Data .............................................................................................................109 Importing Data....................................................................................................................................109 Errors ..................................................................................................................................................110
  • 7. DynamoDB vi 29. DYNAMODB – MONITORING...........................................................................................111 Cloudwatch Console............................................................................................................................111 API Integration....................................................................................................................................111 30. DYNAMODB – CLOUDTRAIL.............................................................................................113 31. DYNAMODB – MAPREDUCE.............................................................................................116 Hive Setup...........................................................................................................................................116 Activate SSH Session ...........................................................................................................................117 32. DYNAMODB – TABLE ACTIVITY ........................................................................................119 Managing Streams ..............................................................................................................................119 33. DYNAMODB – ERROR HANDLING ....................................................................................126 Codes and Messages ...........................................................................................................................126 34. DYNAMODB – BEST PRACTICES .......................................................................................129 Tables..................................................................................................................................................129 Items...................................................................................................................................................129 Queries and Scans...............................................................................................................................129 Local Secondary Indices.......................................................................................................................130 Global Secondary Indices ....................................................................................................................130 35. DYNAMODB – USEFUL RESOURCES .................................................................................131
  • 8. DynamoDB 7 DynamoDB allows users to create databases capable of storing and retrieving any amount of data, and serving any amount of traffic. It automatically distributes data and traffic over servers to dynamically manage each customer's requests, and also maintains fast performance. DynamoDBvs.RDBMS DynamoDB uses a NoSQL model, which means it uses a non-relational system. The following table highlights the differences between DynamoDB and RDBMS: Common Tasks RDBMS DynamoDB Connect to the Source It uses a persistent connection and SQL commands. It uses HTTP requests and API operations. Create a Table Its fundamental structures are tables, and must be defined. It only uses primary keys, and no schema on creation. It uses various data sources. Get Table Info All table info remains accessible. Only primary keys are revealed. Load Table Data It uses rows made of columns. In tables, it uses items made of attributes. Read Table Data It uses SELECT statements and filtering statements. It uses GetItem, Query, and Scan. Manage Indexes It uses standard indexes created through SQL statements. Modifications to it occur automatically on table changes. It uses a secondary index to achieve the same function. It requires specifications (partition key and sort key). Modify Table Data It uses an UPDATE statement. It uses an UpdateItem operation. Delete Table Data It uses a DELETE statement. It uses a DeleteItem operation. Delete a Table It uses a DROP TABLE statement. It uses a DeleteTable operation. Advantages 1. DynamoDB – Overview
  • 9. DynamoDB 8 The two main advantages of DynamoDB are scalability and flexibility. It does not force the use of a particular data source and structure, allowing users to work with virtually anything, but in a uniform way. Its design also supports a wide range of use from lighter tasks and operations to demanding enterprise functionality. It also allows simple use of multiple languages: Ruby, Java, Python, C#, Erlang, PHP, and Perl. Limitations DynamoDB does suffer from certain limitations, however, these limitations do not necessarily create huge problems or hinder solid development. You can review them from the following points:  Capacity Unit Sizes – A read capacity unit is a single consistent read per second for items no larger than 4KB. A write capacity unit is a single write per second for items no bigger than 1KB.  Provisioned Throughput Min/Max – All tables and global secondary indices have a minimum of one read and one write capacity unit. Maximums depend on region. In the US, 40K read and write remains the cap per table (80K per account), and other regions have a cap of 10K per table with a 20K account cap.  Provisioned Throughput Increase and Decrease – You can increase this as often as needed, but decreases remain limited to no more than four times daily per table.  Table Size and Quantity Per Account – Table sizes have no limits, but accounts have a 256 table limit unless you request a higher cap.  Secondary Indexes Per Table – Five local and five global are permitted.  Projected Secondary Index Attributes Per Table – DynamoDB allows 20 attributes.  Partition Key Length and Values – Their minimum length sits at 1 byte, and maximum at 2048 bytes, however, DynamoDB places no limit on values.  Sort Key Length and Values – Its minimum length stands at 1 byte, and maximum at 1024 bytes, with no limit for values unless its table uses a local secondary index.  Table and Secondary Index Names – Names must conform to a minimum of 3 characters in length, and a maximum of 255. They use the following characters: A-Z, a-z, 0-9, “_”, “-”, and “.”.  Attribute Names – One character remains the minimum, and 64KB the maximum, with exceptions for keys and certain attributes.  Reserved Words – DynamoDB does not prevent the use of reserved words as names.  Expression Length – Expression strings have a 4KB limit. Attribute expressions have a 255-byte limit. Substitution variables of an expression have a 2MB limit.
  • 10. DynamoDB 9 Before using DynamoDB, you must familiarize yourself with its basic components and ecosystem. In the DynamoDB ecosystem, you work with tables, attributes, and items. A table holds sets of items, and items hold sets of attributes. An attribute is a fundamental element of data requiring no further decomposition, i.e., a field. PrimaryKey The Primary Keys serve as the means of unique identification for table items, and secondary indexes provide query flexibility. DynamoDB streams record events by modifying the table data. The Table Creation requires not only setting a name, but also the primary key; which identifies table items. No two items share a key. DynamoDB uses two types of primary keys:  Partition Key – This simple primary key consists of a single attribute referred to as the “partition key.” Internally, DynamoDB uses the key value as input for a hash function to determine storage.  Partition Key and Sort Key – This key, known as the “Composite Primary Key”, consists of two attributes: o The partition key and o The sort key. DynamoDB applies the first attribute to a hash function, and stores items with the same partition key together; with their order determined by the sort key. Items can share partition keys, but not sort keys. The Primary Key attributes only allow scalar (single) values; and string, number, or binary data types. The non-key attributes do not have these constraints. SecondaryIndexes These indexes allow you to query table data with an alternate key. Though DynamoDB does not force their use, they optimize querying. DynamoDB uses two types of secondary indexes:  Global Secondary Index – This index possesses partition and sort keys, which can differ from table keys.  Local Secondary Index – This index possesses a partition key identical to the table, however, its sort key differs. 2. DynamoDB – Basic Concepts
  • 11. DynamoDB 10 API The API operations offered by DynamoDB include those of the control plane, data plane (e.g., creation, reading, updating, and deleting), and streams. In control plane operations, you create and manage tables with the following tools:  CreateTable  DescribeTable  ListTables  UpdateTable  DeleteTable In the data plane, you perform CRUD operations with the following tools: Create Read Update Delete PutItem BatchWriteItem GetItem BatchGetItem Query Scan UpdateItem DeleteItem BatchWriteItem The stream operations control table streams. You can review the following stream tools:  ListStreams  DescribeStream  GetShardIterator  GetRecords ProvisionedThroughput In table creation, you specify provisioned throughput, which reserves resources for reads and writes. You use capacity units to measure and set throughput. When applications exceed the set throughput, requests fail. The DynamoDB GUI console allows monitoring of set and used throughput for better and dynamic provisioning. ReadConsistency DynamoDB uses eventually consistent and strongly consistent reads to support dynamic application needs. Eventually consistent reads do not always deliver current data. The strongly consistent reads always deliver current data (with the exception of equipment failure or network problems). Eventually consistent reads serve as the default setting, requiring a setting of true in the ConsistentRead parameter to change it.
  • 12. DynamoDB 11 Partitions DynamoDB uses partitions for data storage. These storage allocations for tables have SSD backing and automatically replicate across zones. DynamoDB manages all the partition tasks, requiring no user involvement. In table creation, the table enters the CREATING state, which allocates partitions. When it reaches ACTIVE state, you can perform operations. The system alters partitions when its capacity reaches maximum or when you change throughput.
  • 13. DynamoDB 12 The DynamoDB Environment only consists of using your Amazon Web Services account to access the DynamoDB GUI console, however, you can also perform a local install. Navigate to the following website: https://aws.amazon.com/dynamodb/ Click the “Get Started with Amazon DynamoDB” button, or the “Create an AWS Account” button if you do not have an Amazon Web Services account. The simple, guided process will inform you of all the related fees and requirements. After performing all the necessary steps of the process, you will have the access. Simply sign in to the AWS console, and then navigate to the DynamoDB console. Be sure to delete unused or unnecessary material to avoid associated fees. LocalInstall The AWS (Amazon Web Service) provides a version of DynamoDB for local installations. It supports creating applications without the web service or a connection. It also reduces provisioned throughput, data storage, and transfer fees by allowing a local database. This guide assumes a local install. When ready for deployment, you can make a few small adjustments to your application to convert it to AWS use. The install file is a .jar executable. It runs in Linux, Unix, Windows, and any other OS with Java support. Download the file by using one of the following links:  Tarball – http://dynamodb-local.s3-website-us-west- 2.amazonaws.com/dynamodb_local_latest.tar.gz  Zip archive – http://dynamodb-local.s3-website-us-west- 2.amazonaws.com/dynamodb_local_latest.zip Note: Other repositories offer the file, but not necessarily the latest version. Use the links above for up-to-date install files. Also, ensure you have Java Runtime Engine (JRE) version 6.x or a newer version. DynamoDB cannot run with older versions. After downloading the appropriate archive, extract its directory (DynamoDBLocal.jar) and place it in the desired location. You can then start DynamoDB by opening a command prompt, navigating to the directory containing DynamoDBLocal.jar, and entering the following command: java -Djava.library.path=./DynamoDBLocal_lib -jar DynamoDBLocal.jar -sharedDb You can also stop the DynamoDB by closing the command prompt used to start it. 3. DynamoDB – Environment
  • 14. DynamoDB 13 WorkingEnvironment You can use a JavaScript shell, a GUI console, and multiple languages to work with DynamoDB. The languages available include Ruby, Java, Python, C#, Erlang, PHP, and Perl. In this tutorial, we use Java and GUI console examples for conceptual and code clarity. Install a Java IDE, the AWS SDK for Java, and setup AWS security credentials for the Java SDK in order to utilize Java. Conversion from Local to Web Service Code When ready for deployment, you will need to alter your code. The adjustments depend on code language and other factors. The main change merely consists of changing the endpoint from a local point to an AWS region. Other changes require deeper analysis of your application. A local install differs from the web service in many ways including, but not limited to the following key differences:  The local install creates tables immediately, but the service takes much longer.  The local install ignores throughput.  The deletion occurs immediately in a local install.  The reads/writes occur quickly in local installs due to the absence of network overhead.
  • 15. DynamoDB 14 DynamoDB provides three options for performing operations: a web-based GUI console, a JavaScript shell, and a programming language of your choice. In this tutorial, we will focus on using the GUI console and Java language for clarity and conceptual understanding. GUIConsole The GUI console or the AWS Management Console for Amazon DynamoDB can be found at the following address: https://console.aws.amazon.com/dynamodb/home It allows you to perform the following tasks:  CRUD  View Table Items  Perform Table Queries  Set Alarms for Table Capacity Monitoring  View Table Metrics in Real-Time  View Table Alarms 4. DynamoDB – Operations Tools
  • 16. DynamoDB 15 If your DynamoDB account has no tables, on access, it guides you through creating a table. Its main screen offers three shortcuts for performing common operations:  Create Tables  Add and Query Tables  Monitor and Manage Tables TheJavaScriptShell DynamoDB includes an interactive JavaScript shell. The shell runs inside a web browser, and the recommended browsers include Firefox and Chrome.
  • 17. DynamoDB 16 Note: Using other browsers may result in errors. Access the shell by opening a web browser and entering the following address: http://localhost:8000/shell Use the shell by entering JavaScript in the left pane, and clicking the “Play” icon button in the top right corner of the left pane, which runs the code. The code results display in the right pane. DynamoDB and Java Use Java with DynamoDB by utilizing your Java development environment. Operations confirm to normal Java syntax and structure.
  • 18. DynamoDB 17 Data types supported by DynamoDB include those specific to attributes, actions, and your coding language of choice. AttributeDataTypes DynamoDB supports a large set of data types for table attributes. Each data type falls into one of the three following categories:  Scalar – These types represent a single value, and include number, string, binary, Boolean, and null.  Document – These types represent a complex structure possessing nested attributes, and include lists and maps.  Set – These types represent multiple scalars, and include string sets, number sets, and binary sets. Remember DynamoDB as a schemaless, NoSQL database that does not need attribute or data type definitions when creating a table. It only requires a primary key attribute data types in contrast to RDBMS, which require column data types on table creation. Scalars  Numbers – They are limited to 38 digits, and are either positive, negative, or zero.  String – They are Unicode using UTF-8, with a minimum length of >0 and maximum of 400KB.  Binary – They store any binary data, e.g., encrypted data, images, and compressed text. DynamoDB views its bytes as unsigned.  Boolean – They store true or false.  Null – They represent an unknown or undefined state. Document  List – It stores ordered value collections, and uses square ([...]) brackets.  Map – It stores unordered name-value pair collections, and uses curly ({...}) braces. 5. DynamoDB – Data Types
  • 19. DynamoDB 18 Set Sets must contain elements of the same type whether number, string, or binary. The only limits placed on sets consist of the 400KB item size limit, and each element being unique. Action Data Types DynamoDB API holds various data types used by actions. You can review a selection of the following key types:  AttributeDefinition – It represents key table and index schema.  Capacity – It represents the quantity of throughput consumed by a table or index.  CreateGlobalSecondaryIndexAction – It represents a new global secondary index added to a table.  LocalSecondaryIndex – It represents local secondary index properties.  ProvisionedThroughput – It represents the provisioned throughput for an index or table.  PutRequest – It represents PutItem requests.  TableDescription – It represents table properties. Supported Java Datatypes DynamoDB provides support for primitive data types, Set collections, and arbitrary types for Java.
  • 20. DynamoDB 19 End of ebook preview If you liked what you saw… Buy it from our store @ https://store.tutorialspoint.com