What is SQS(Simple Queue Service) How does it works?

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Introduction:-

SQS(Simple Queue Service) is a pull notification platform. SQS is a fast, reliable, fully managed message queue service as it is a web service that gives you access to a message queue that store messages waiting to be processed as it offers a reliable highly scalable hosted queue for storing message between servers.

It allows for the decoupling of application components such that failure in one component does not cause a bigger problem to application functionality.

Using an SQS you no longer need a highly available message cluster or the burden of running it.

You can delete all the messages in the SQS queue without deleting the SQS queue itself.

Types of Queue:- There are two types of Queue

Standard Queue:-

High (Unlimited ) Throughput.
At least one delivery.
Duplicacy is possible.
Best effort ordering.

FIFO Queue:-

Limited Throughput (300 TPS)
Exactly one processing
Duplicacy is not possible
Strict ordering -> First in – First Out
FIFO Queues is limited to 300 Transaction per second (TPS)

Types of Polling:-

Short Polling:–

A request is returned instantly even if the queue is empty.
it does not wait for the message to appear in the queue.
It queries only a subset of available servers for message
Default by SQS
Receive wait time is set to 0.

Long Polling:-

Is referred to as regular/short polling. it uses fewer requests and request costs by:-

Eliminating false empty responses Quering all other servers
Reduce the number of empty responses by aligning amazon SQS to wait until the message is unavailable in the queue before sending the response unless the connection timeout (20 seconds).
Receive message wait time is set to a non-zero value (Max 20 Seconds).
Billing is the same for Both Polling.

SQS Pricing:-

The first 1 Million monthly requests are free after the pricing is according to the region

For eg ->

Standard queue – $040/million request

FIFO queue – $050/million request

_{How Amazon SQS Charges:}

API Action:- Every amazon SQS action count as a request.
FIFO Request:- Api action for sending receiving, deleting, and changing the visibility of messages from FIFO queues are charged at FIFO rates.
Content of Request:- A single request can have from 1 to 10 messages.
Size of Payload:– Each 64 kb chunk of a payload is billed as 1 resource.

How does it work?

Go To console
Search For SIMPLE QUEUE SERVICES
Create queue -> For eg-> Test queue
Remains all things to Default
Create a message and send a message and there should be no delay time in the message.
Again go To service -> Search Compute -> SEARCH LAMBDA
Create Function -> USE A Blueprint Feature
Search SQS poller and select it.
SQS trigger -> Testqueqe ( Name of the queue)
Select batch size to 5
After all, these steps just scroll down and click on Create Function
A message will be displayed Congratulation it has been created
SQS should be enabled.