![]() ![]() ![]() SSE encrypts messages as soon as SQS receives them and decrypts messages only when they are sent to an authorized consumer. SQS supports HTTP over SSL (HTTPS) and Transport Layer Security (TLS) protocols.SQS stores all message queues and messages within a single, highly-available AWS region with multiple redundant Availability Zones (AZs).Working together, automatic batching and prefetching increase the throughput and reduce the latency of the application while reducing the costs by making fewer SQS requests.Prefetching of messages into a local buffer that allows the application to immediately process messages from SQS without waiting for the messages to be retrieved.Automatic batching of multiple SendMessage, DeleteMessage, or ChangeMessageVisibility requests without any required changes to the application.Amazon SQS Buffered Async Client for Java provides an implementation of the AmazonSQSAsyncClient interface and adds several important features:.SQS Short and Long polling control how the queues would be polled and Long polling help reduce empty responses.DLQ Redrive policy specifies the source queue, the dead-letter queue, and the conditions under which SQS moves messages from the former to the latter if the consumer of the source queue fails to process a message a specified number of times.SQS Dead-letter queues – DLQ helps source queues ( Standard and FIFO) target messages that can’t be processed (consumed) successfully.Visibility timeout defines the period where SQS blocks the visibility of the message and prevents other consuming components from receiving and processing that message.SQS allows the deletion of the queue with messages in it.SQS can delete a queue without notification if any action hasn’t been performed on it for 30 consecutive days.Queues can be configured to retain messages for 1 minute to 14 days after the message has been sent.SQS queue retains messages for four days, by default.SQS allows queues to be created, deleted and messages can be sent and received from it.SQS queues can be used to determine the load on an application, and combined with Auto Scaling, the EC2 instances can be scaled in or out, depending on the volume of traffic.Combine SQS with SNS to send identical copies of a message to multiple queues in parallel for simultaneous processing.Move slow operations off of interactive request paths by enqueueing the request.Add scalability and reliability to the architecture and smooth out temporary volume spikes without losing messages or increasing latency.Decouple components of a distributed application that may not all process the same amount of work simultaneously.Refer SQS FIFO Queue for detailed information SQS Standard Queues vs SQS FIFO Queues FIFO queues have all the capabilities of the standard queues but are designed to enhance messaging between applications when the order of operations and events is critical, or where duplicates can’t be tolerated.FIFO (First-In-First-Out) queues provide messages in order and exactly once delivery.Refer SQS Standard Queue for detailed information SQS FIFO Queue Standard queues provide best-effort ordering which ensures that messages are generally delivered in the same order as they’re sent.Standard queues support a nearly unlimited number of API calls per second, per API action ( SendMessage, ReceiveMessage, or DeleteMessage).However, occasionally (because of the highly distributed architecture that allows nearly unlimited throughput), more than one copy of a message might be delivered out of order. Standard queues support at-least-once message delivery.Standard queues are the default queue type.supports encryption at rest and encryption in transit using the HTTP over SSL (HTTPS) and Transport Layer Security (TLS) protocols for security.helps build distributed applications with decoupled components.provides fault-tolerant, loosely coupled, flexibility of distributed components of applications to send & receive without requiring each component to be concurrently available.offers a reliable, highly-scalable, hosted queue for storing messages in transit between applications.is fully managed and requires no administrative overhead and little configuration.is a message queue service used by distributed applications to exchange messages through a polling model, and can be used to decouple sending and receiving components.A queue is a temporary repository for messages awaiting processing and acts as a buffer between the component producer and the consumer.Simple Queue Service – SQS is a highly available distributed queue system.AWS Certification Exam Practice Questions AWS Simple Queue Service – SQS ![]()
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