AWS SQS (Simple Queue Service)Standard Queue/FIFO Queue

Attributes:
• Unlimited throughput, unlimited number of messages in queue
• Default retention of messages: 4 days, maximum of 14 days

SQS – Producing Messages
• Produced to SQS using the SDK (SendMessage API)
• The message is persisted in SQS until a consumer deletes it
• Message retention: default 4 days, up to 14 days

SQS – Message Visibility Timeout
• After a message is polled by a consumer, it becomes invisible to other consumers
• By default, the “message visibility timeout” is 30 seconds
• That means the message has 30 seconds to be processed
• After the message visibility timeout is over, the message is “visible” in SQS