> For the complete documentation index, see [llms.txt](https://huy312100.gitbook.io/software-development/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://huy312100.gitbook.io/software-development/cloud-service/aws/certificate/clf-c02/cloud-technology-and-services/cloud-integration/sns.md).

# SNS

Simple Notification Service

• What if you want to send one message to many receivers?

<figure><img src="https://1722711354-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FwNXdoUkfmcozr29fRrfb%2Fuploads%2FsdDjVekClvMcEFIww1Ep%2FScreenshot%202023-12-24%20at%2000.16.51.png?alt=media&amp;token=b0a76219-09bf-4532-a11a-3bc625cf9579" alt=""><figcaption></figcaption></figure>

• The “event publishers” only send messages to one SNS topic

• As many “event subscribers” as we want to listen to the SNS topic notifications

• Each subscriber to the topic will get all the messages

• Up to 12,500,000 subscriptions per topic, 100,000 topics limit

<figure><img src="https://1722711354-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FwNXdoUkfmcozr29fRrfb%2Fuploads%2F0oqHhvuQIvKineH1R0J8%2FScreenshot%202023-12-24%20at%2000.18.29.png?alt=media&amp;token=51bb5b10-c080-42d2-861f-d2c301f69447" alt=""><figcaption></figcaption></figure>