Scope

Region

Features

Apps PUSH messages to a topic.

You can subscribe a queue (SQS) or Lambda to a topic cross-region, cross-account. When doing so it is important to use the global condition key SourceArn or SourceAccount in queue resource policy to restrict which topic can publish to the queue.

Often the first building block of a fan out architectural pattern.

graph LR
src(source) --> sns
sns(sns use1) --> q1(sqs1 usw1) --> app1
sns --> q2(sqs2 use1) --> app2
sns --> q3(sqs3 euw1) --> app3