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Developer's Guide to Amazon SimpleDB, A

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    ePub EPUB The open industry format known for its reflowable content and usability on supported mobile devices.

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  • Copyright 2011
  • Dimensions: 7 X 9
  • Pages: 288
  • Edition: 1st
  • Book
  • ISBN-10: 0-321-62363-0
  • ISBN-13: 978-0-321-62363-8

The Complete Guide to Building Cloud Computing Solutions with Amazon SimpleDB

 

Using SimpleDB, any organization can leverage Amazon Web Services (AWS), Amazon’s powerful cloud-based computing platform–and dramatically reduce the cost and resources associated with application infrastructure. Now, for the first time, there’s a complete developer’s guide to building production solutions with Amazon SimpleDB.

 

Pioneering SimpleDB developer Mocky Habeeb brings together all the hard-to-find information you need to succeed. Mocky tours the SimpleDB platform and APIs, explains their essential characteristics and tradeoffs, and helps you determine whether your applications are appropriate for SimpleDB. Next, he walks you through all aspects of writing, deploying, querying, optimizing, and securing Amazon SimpleDB applications–from the basics through advanced techniques.

 

Throughout, Mocky draws on his unsurpassed experience supporting developers on SimpleDB’s official Web forums. He offers practical tips and answers that can’t be found anywhere else, and presents extensive working sample code–from snippets to complete applications.

 

With A Developer’s Guide to Amazon SimpleDB you will be able to

  • Evaluate whether a project is suited for Amazon SimpleDB
  • Write SimpleDB applications that take full advantage of SimpleDB’s availability, scalability, and flexibility
  • Effectively manage the entire SimpleDB application lifecycle
  • Deploy cloud computing applications faster and more easily
  • Work with SELECT and bulk data operations
  • Fine tune queries to optimize performance
  • Integrate SimpleDB security into existing organizational security plans
  • Write and enhance runtime SimpleDB clients
  • Build complete applications using AJAX and SimpleDB
  • Understand low-level issues involved in writing clients and frameworks
  • Solve common SimpleDB usage problems and avoid hidden pitfalls

 

This book will be an indispensable resource for every IT professional evaluating or using SimpleDB to build cloud-computing applications, clients, or frameworks.

 

Online Sample Chapter

Introducing Amazon SimpleDB

Sample Pages

Download the sample pages (includes Chapter 1 and Index)

Table of Contents

Preface    xvi

Acknowledgments    xviii

1    Introducing Amazon SimpleDB    1

What Is SimpleDB?    1

What SimpleDB Is Not    1

Schema-Less Data    2

Stored Securely in the Cloud    2

Billed Only for Actual Usage    3

Domains, Items, and Attribute Pairs    3

Multi-Valued Attributes    3

Queries    4

High Availability    4

Database Consistency    5

Sizing Up the SimpleDB Feature Set    6

Benefits of Using SimpleDB    6

Database Features SimpleDB Doesn’t Have    7

Higher-Level Framework Functionality    7

Service Limits    8

Abandoning the Relational Model?    8

A Database Without a Schema    9

Areas Where Relational Databases Struggle    10

Scalability Isn’t Your Problem    11

Avoiding the SimpleDB Hype    11

Putting the DBA Out of Work    12

Dodging Copies of C.J. Date    13

Other Pieces of the Puzzle    14

Adding Compute Power with Amazon EC2    14

Storing Large Objects with Amazon S3    14

Queuing Up Tasks with Amazon SQS    15

Comparing SimpleDB to Other Products and Services    15

Windows Azure Platform    15

Google App Engine    17

Apache CouchDB    17

Dynamo-Like Products    18

Compelling Use Cases for SimpleDB    18

Web Services for Connected Systems    18

Low-Usage Application    19

Clustered Databases Without the Time Sink    19

Dynamic Data Application    19

Amazon S3 Content Search    20

Empowering the Power Users    20

Existing AWS Customers    20

Summary    21

2    Getting Started with SimpleDB    23

Gaining Access to SimpleDB    23

Creating an AWS Account    23

Signing Up for SimpleDB    24

Managing Account Keys    24

Finding a Client for SimpleDB    24

Building a SimpleDB Domain Administration Tool    25

Administration Tool Features    25

Key Storage    25

Implementing the Base Application    26

Displaying a Domain List    28

Adding Domain Creation    28

Supporting Domain Deletion    29

Listing Domain Metadata    29

Running the Tool    31

Packaging the Tool as a Jar File    31

Building a User Authentication Service    31

Integrating with the Spring Security Framework    32

Representing User Data    32

Fetching User Data with SimpleDBUserService    34

Salting and Encoding Passwords    36

Creating a User Update Tool    37

Summary    39

3    A Code-Snippet Tour of the SimpleDB API    41

Selecting a SimpleDB Client    41

Typica Setup in Java    42

C# Library for Amazon SimpleDB Setup    43

Tarzan Setup in PHP    45

Common Concepts    45

The Language Gap    45

SimpleDB Endpoints    45

SimpleDB Service Versions    47

Common Response Elements    47

CreateDomain    48

CreateDomain Parameters    49

CreateDomain Response Data    49

CreateDomain Snippet in Java    49

CreateDomain Snippet in C#    50

CreateDomain Snippet in PHP    50

ListDomains    51

ListDomains Parameters    51

ListDomains Response Data    51

ListDomains Snippet in Java    52

ListDomains Snippet in C#    52

ListDomains Snippet in PHP    53

DeleteDomain    54

DeleteDomain Parameters    54

DeleteDomain Response Data    54

DeleteDomain Snippet in Java    55

DeleteDomain Snippet in C#    55

DeleteDomain Snippet in PHP    55

DomainMetadata    56

DomainMetadata Parameters    56

DomainMetadata Response Data    56

DomainMetadata Snippet in Java    57

DomainMetadata Snippet in C#    58

DomainMetadata Snippet in PHP    58

PutAttributes    59

PutAttributes Parameters    60

PutAttributes Response Data    62

PutAttributes Snippet in Java    63

PutAttributes Snippet in C#    64

PutAttributes Snippet in PHP    65

GetAttributes    65

GetAttributes Parameters    65

GetAttributes Response Data    66

GetAttributes Snippet in Java    67

GetAttributes Snippet in C#    68

GetAttributes Snippet in PHP    69

DeleteAttributes    70

DeleteAttributes Parameters    70

DeleteAttributes Response Data    71

DeleteAttributes Snippet in Java    72

DeleteAttributes Snippet in C#    72

DeleteAttributes Snippet in PHP    73

BatchPutAttributes    73

BatchPutAttributes Parameters    74

BatchPutAttributes Response Data    75

BatchPutAttributes Snippet in Java    76

BatchPutAttributes Snippet in C#    77

BatchPutAttributes Snippet in PHP    78

Select    79

Select Parameters    79

Select Response Data    80

Select Snippet in Java    81

Select Snippet in C#    83

Select Snippet in PHP    85

Summary    86

4    A Closer Look at Select    87

Select Syntax    87

Required Clauses    88

Select Quoting Rule for Names    88

Output Selection Clause    89

WHERE Clause    90

Select Quoting Rules for Values    90

Sort Clause    91

LIMIT Clause    92

Formatting Attribute Data for Select    93

Integer Formatting    94

Floating Point Formatting    95

Date and Time Formatting    95

Case Sensitivity    97

Expressions and Predicates    97

Simple Comparison Operators    98

Range Operators    98

IN() Queries    99

Prefix Queries with LIKE and NOT LIKE    99

IS NULL and IS NOT NULL    100

Multi-Valued Attribute Queries    100

Multiple Predicate Queries with the INTERSECTION

Operator    101

Selection with EVERY()    102

Query Results with the Same Item Multiple Times    102

Improving Query Performance    103

Attribute Indexes    103

Composite Attributes    104

Judicious Use of LIKE    105

Running on EC2    106

Skipping Pages with count() and LIMIT    106

Measuring Select Performance    107

Automating Performance Measurements    109

Summary    110

5    Bulk Data Operations    111

Importing Data with BatchPutAttributes    112

Calling BatchPutAttributes    112

Mapping the Import File to SimpleDB Attributes    112

Supporting Multiple File Formats    113

Storing the Mapping Data    113

Reporting Import Progress    113

Creating Right-Sized Batches    114

Managing Concurrency    114

Resuming a Stopped Import    115

Verifying Progress and Completion    115

Properly Handling Character Encodings    116

Backup and Data Export    116

Using Third-Party Backup Services    117

Writing Your Own Backup Tool    118

Restoring from Backup    119

Summary    119

6    Working Beyond the Boundaries    121

Availability: The Final Frontier    121

Boundaries of Eventual Consistency    123

Item-Level Atomicity    123

Looking into the Eventual Consistency Window    124

Read-Your-Writes    125

Implementing a Consistent View    125

Handling Text Larger Than    1K    128

Storing Text in S3    128

Storing Overflow in Different Attributes    129

Storing Overflow as a Multi-Valued Attribute    130

Entities with More than    256 Attributes    131

Paging to Arbitrary Query Depth    131

Exact Counting Without Locks or Transactions    133

Using One Item Per Count    134

Storing the Count in a Multi-Valued Attribute    136

Testing Strategies    138

Designing for Testability    138

Alternatives to Live Service Calls    139

Summary    139

7    Planning for the Application Lifecycle    141

Capacity Planning    141

Estimating Initial Costs    141

Keeping Tabs on SimpleDB Usage with AWS Usage

Reports    142

Creating More Finely Detailed Usage Reports    145

Tracking Usage over Time    146

Storage Requirements    146

Computing Storage Costs    147

Understanding the Cost of Slack Space    147

Evaluating Attribute Concatenation    148

Scalability: Increasing the Load    148

Planning Maintenance    150

Using Read-Repair to Apply Formatting Changes    150

Using Read-Repair to Update Item Layout    152

Using a Batch Process to Apply Updates    152

Summary    153

8    Security in SimpleDB-Based Applications    155

Account Security    155

Managing Access Within the Organization    155

Limiting Amazon Access from AWS Credentials    157

Boosting Security with Multi-Factor Authentication    158

Access Key Security    159

Key Management    159

Secret Key Rotation    160

Data Security    161

Storing Clean Data    161

SSL and Data in Transmission    162

Data Storage and Encryption    164

Storing Data in Multiple Locations    165

Summary    165

9    Increasing Performance    167

Determining If SimpleDB Is Fast Enough    167

Targeting Moderate Performance in Small Projects    167

Exploiting Advanced Features in Small Projects    168

Speeding Up SimpleDB    169

Taking Detailed Performance Measurements    169

Accessing SimpleDB from EC2    169

Caching    170

Concurrency    172

Keeping Requests and Responses Small    173

Operation-Specific Performance    174

Optimizing GetAttributes    174

Optimizing PutAttributes    178

Optimizing BatchPutAttributes    179

Optimizing Select    180

Data Sharding    181

Partitioning Data    181

Multiplexing Queries    181

Accessing SimpleDB Outside the Amazon Cloud    182

Working Around Latency    182

Ignoring Latency    183

Summary    183

10    Writing a SimpleDB Client: A Language-Independent

Guide    185

Client Design Overview    185

Public Interface    186

Attribute Class    188

Item Class    190

Client Design Considerations    191

High-Level Design Issues    191

Operation-Specific Considerations    193

Implementing the Client Code    196

Safe Handling of the Secret Key    196

Implementing the Constructor    197

Implementing the Remaining Methods    198

Making Requests    200

Computing the Signature    208

Making the Connections    210

Parsing the Response    214

Summary    216

11    Improving the SimpleDB Client    217

Convenience Methods    217

Convenient Count Methods    217

Select with a Real Limit    219

Custom Metadata and Building a Smarter Client    219

Justifying a Schema for Numeric Data    220

Database Tools    221

Coordinating Concurrent Clients    221

Storing Custom Metadata within SimpleDB    221

Storing Custom Metadata in S3    222

Automatically Optimizing for Box Usage Cost    222

The Exponential Cost of Write Operations    223

QueryTimeout: The Most Expensive Way to Get Nothing    225

Automated Domain Sharding    228

Domain Sharding Overview    228

Put/Get Delete Routing    228

Query Multiplexing    231

Summary    232

12    Building a Web-Based Task List    233

Application Overview    233

Requirements    233

The Data Model    234

Implementing User Authentication    235

Implementing a Task Workspace    238

Implementing a Task Service    241

Adding the Login Servlet    244

Adding the Logout Servlet    249

Displaying the Tasks    249

Adding New Tasks    252

Deployment    252

Summary    254

Index    255

 

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