Azure Cosmos DB

Technical Article

Introduction to Continuation tokens in Azure CosmosDB

  • DatabaseWeekly

To understand what Continuation does in Azure CosmosDB, Let's look at how SQL Server handles query results first and try to compare SQL Server to CosmosDB. If you will run the following select statement in SQL Server. You will end up with all the data Orders table has. If there are 1 million rows, SQL Server will try to deliver 1 million rows to you like a warrior.

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2019-04-26

Technical Article

Why Partitioning is very important in Azure CosmosDB

  • DatabaseWeekly

In any Introduction level CosmosDB talk, Presenter will suggest you pay more attention to the Partitioning part of the talk. Microsoft wants you to create great solution by using Azure CosmosDB and there are a lot of resources out there for developers. The challenge in Azure CosmosDB is, you don't need a DBA in CosmosDB and developers may not pay attention to details like Partitioning when they create databases in Azure CosmosDB.

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2019-04-12

External Article

Introduction to Azure Cosmos DB Global Distribution

  • Article

Global distribution of updatable data stores is one of the more challenging goals that software designers and architects have been struggling with over the years. Addressing this challenge has become increasingly pressing as the rapid growth of cloud technologies increased the need for deployments capable of spanning multiple geographical areas. In this article, we will provide an introduction to global distribution-related functionality in Cosmos DB.

2018-07-31

3,325 reads

External Article

Introduction to Azure Cosmos DB Emulator for Creating Applications

  • Article

Azure Cosmos DB is Microsoft’s NoSQL database platform running in the cloud. In this article, Suhas Pande explains many of the core concepts in Cosmos DB. Additionally, he goes over how to set up a local Cosmos DB emulator to create collections and documents. Using a local emulator is free and allows development with Cosmos DB without being connected to Azure.

2018-07-26

3,673 reads

External Article

Controlling Access to Azure Cosmos DB

  • Article

Azure Cosmos DB offers features that facilitate data availability and resiliency. However, there is also a different, very important aspect of facilitating access to distributed data sources in the most optimal manner, which focuses on access control mechanisms. Read on to learn the specifics of this aspect, as it applies to Azure Cosmos DB.

2018-04-04

2,223 reads

External Article

Azure Cosmos DB Partitioning

  • Article

One of the most important design decisions that must be made when planning deployment of Azure Cosmos DB involves logical partitioning of data that will populate target collections, graphs, or tables. Selecting the optimal partitioning model has both performance and pricing implications. In this article, we will explore the rationale behind these implications and review the partitioning options.

2018-03-08

2,357 reads

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Question of the Day

The Read Committed Snapshot Isolation behaviour

I am currently working with Sql Server 2022 and AdventureWorks database. First of all, let's set the "Read Committed Snapshot" to ON: 

use master;
go

alter database AdventureWorks set read_committed_snapshot on with no_wait;
go
Then, from Session 1, I execute the following code: 
--Session 1
use AdventureWorks;
go

create table ##t1 (id int, f1 varchar(10));
go

insert into ##t1 values (1, 'A');
From another session, called Session 2, I open a transaction and execute the following update: 
--Session 2
use AdventureWorks;
go

begin tran;
update ##t1 
set f1 = 'B'
where id = 1;
Now, going back to Session 1, what happens if I execute this statement? 
--Session 1
select f1
from ##t1
where id = 1;
 

See possible answers