Amazon Simple Queue Service (SQS) is a fully managed messaging service offered by AWS (Amazon Web Services). It enables applications to communicate asynchronously by sending and receiving messages through queues. SQS is particularly useful for decoupling components of a distributed system, thereby improving the scalability and resiliency of the application.
Key Features:
1. Standard Queues: Provides at-least-once delivery with no strict ordering guarantees.
2. FIFO (First-In-First-Out) Queues: Ensures messages are delivered in the exact order they were sent, eliminating duplicates.
3. Automated Management: SQS handles infrastructure, scaling, and redundancy, ensuring high availability.
4. Durability and Security: Messages are stored securely with encryption at rest, guaranteeing confidentiality and integrity.
SQS is commonly used in cloud architectures to transmit messages between services such as microservices or Lambda functions. It helps to balance loads, handle traffic spikes, and prevent system failures.
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