7-Application Services Flashcards
1
Q
How does SQS manage retries?
A
With the visibility threshold
2
Q
What are the types of SQS queue?
A
Standard and FIFO (up to 300 TPS)
3
Q
How large can SQS messages be?
A
256 KB
4
Q
How long are SQS messages retained?
A
Up to 14 days but the maximum visibility timeout is 12 hours
5
Q
How does SWF work?
A
It has Domains that group Flows. Workers do tasks and Deciders coordinate tasks.
It ensures tasks are assigned once and never duplicated. Unlike SQS, tasks can take longer than 12 hours
6
Q
How does SNS work?
A
it’s push based.
Messages are stored redundantly in multiple AZs
Topics allow multiple recipients to be grouped
7
Q
What are the Kinesis services?
A
Streams, Firehose and Analytics
