Message Queue

SQS

• Default retention of message is 4 days, maximum 14 days

• Maximum message size is 256 Kb

• Message visibility timeout that become invisible to other customers default is 30 seconds, maximum is 900 seconds

• FIFO should be used if ordering of the message is important

Dead letter queue

• To capture all messages that can't be processed, the message failed will be falled into dead-letter-queue

SNS

• The message can be received by multiple services

• 100,000 topics limit

• Can be send to the specific service by using message filtering based on the message content