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Guide to NoSQL with Azure Cosmos DB

You're reading from   Guide to NoSQL with Azure Cosmos DB Work with the massively scalable Azure database service with JSON, C#, LINQ, and .NET Core 2

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Product type Paperback
Published in Sep 2018
Publisher Packt
ISBN-13 9781789612899
Length 214 pages
Edition 1st Edition
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Authors (2):
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Gaston C. Hillar Gaston C. Hillar
Author Profile Icon Gaston C. Hillar
Gaston C. Hillar
Daron Yöndem Daron Yöndem
Author Profile Icon Daron Yöndem
Daron Yöndem
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Table of Contents (9) Chapters Close

Preface 1. Introduction to NoSQL in Cosmos DB 2. Getting Started with Cosmos DB Development and NoSQL Document Databases FREE CHAPTER 3. Writing and Running Queries on NoSQL Document Databases 4. Building an Application with C#, Cosmos DB, a NoSQL Document Database, and the SQL API 5. Working with POCOs, LINQ, and a NoSQL Document Database 6. Tuning and Managing Scalability with Cosmos DB 7. Answers 8. Other Books You May Enjoy

Understanding rate limiting and throttling


If we hit the provisioned RU/s rate limit for any operation or query, the Cosmos DB service won't execute this operation and the API will throw a DocumentClientException exception with the HttpStatusCode property set to 429. This HTTP status code means that the request made to Azure Cosmos DB has exceeded the provisioned throughput and it couldn't be executed.

In some cases, the only way to execute the request would be to increase the provisioned throughput. For example, if we have a single operation that requires more than 1,000 RU/s but we have provisioned only 1,000 RU/s, there will be no way to execute the operation unless we increase the provisioned throughput. No matter the number of times we retry, the operation will always fail. Of course, we should avoid operations that require a huge amount of RU/s.

If we have two operations that require 501 RU/s each and we have provisioned only 1,000 RU/s, neither operation would be able to be executed...

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