Section 19: Serverless overview Flashcards by Marcello Amente

Lambda pricing model

Per request and compute time

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With Lambda how can you improve CPU and network

increase ram

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AWS lambda supports these two languages

Node.js
Python

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Main Lambda integrations

API Gateway
Kinesis
DynamoDB
S3
CloudFront
CloudWatch events
CloudWatch logs
SNS
SQS
Cognito

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Lambda limits per region for memory allocation

128mb-10gb(1mb increments)

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Lambda execution limits per region for max execution time

900 seconds(15 minutes)

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Lambda execution limits per region for variables

4kb

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Lambda execution limits per region for temp disk capacity

512mb to 10gb

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Lambda execution limits per region for concurrent executions

1000(can be increased)

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Lambda deployment limits per region for compressed deployment size

50mb

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Lambda deployment limits per region for uncompressed deployment size

250mb

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With lambda throttling synchronous invocation throttle will return this error

429

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With lambda throttling asynchronous invocation throttle will return this error

retry automatically and then go to DLQ

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With aws lambda this type of concurency can cause latency with new requests

cold start

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With aws lambda you can use this concurrency to avoid cold starts

provisioned concurrency

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A feature that improves your lambda functions performance to to 10x at no extra cost for java, python & .net

SnapStart

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Two types of edge functions that cloudfront provides

cloudfront functions
Lamda@Edge

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What type of requests from a client does cloudfront functions support?

Viewer request
Viewer response

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What type of requests from a client does Lambda@Edge support?

Viewer request
Viewer response
Origin Request
Origin Response

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Runtimes supported by CloudFront functions

Javascript

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Runtimes supported by Lamda@Edge

Node.js
Python

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Difference between CloudFront functions and Lamda@Edge in terms of # of requests per second

Cloudfront Functions = millions
Lambda@Edge = thousands

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Cloudfront functions use cases

Cache Key normalization

Header manipulation

URL rewrites

Request authentication

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Lamda2Edge use cases

Study These Flashcards

Adjustable CPU or memory

3rd party code libraries

Network access to use external services for processing

Three benefits of an RDS proxy

Improves scalability by polling and sharing database connections Improves availability by reducing the failover time and preserving connections Improves security by enforcing IAM authentication

In regards to lambda working with RDS proxy, where do lambda functions need to be deployed?

In your own VPC. RDS proxies aren't publicy accessible

Invoking lambda functions from within your DB instance is supported by these two sql databases

RDS for PostgreSQL Aurora MySQL

To allow invoking of lambda functions from within your DB you must allow this and have this.

outbound traffic to your lambda function Required permissions to invoke the lambda function

RDS event notifications only give details about this but not this

Event about the database itself Not the data itself

Is a dynamo db SQL?

Dynamo DB peformance

single-digit millisecond

Dynamo is made of these?

Tables

Each dynamo db has this key

Primary

Max size of a Dynamo DB item?

400kb

Dynamo DB supported data types

Scalar Document Set Types

If using Dynamo DB you can rapidly evolve this

Schemas

Dynamo DB R/W capacity mode for predictable workloads

Provisioned mode

Dynamo DB R/W capacity mode for unpredictable workloads

On-Demand mode

With DynamoDB you can use this to solve read congestion

DynamoDB accelerator(DAX)

Dynamo DB streams retention

24 hours

Kinesis Data Streams retention

1 year

With dynamo DB this table is replicated across regions

Global

Dynamo DB Time to Live use cases

Web Session handling regulatory

DynamoDB PITR recovery time window range

1-35 days

DynamoDB backup for long-term retention

On-Demand backups

With this Dynamo DB backup you can have it configured and managed in AWS backup

On-Demand

To export a dynamo db data to S3 you must enable this

PITR(Point in time recovery)

API Gateway integrations

Lambda Functions HTTP AWS Services

This type of API gateway deployment is for global clients

edge optimized

This type of API gateway deployment is for clients expected to be in the same region

Regional

This type of API gateway deployment is for non public access only to your vpc

Private

This authentication service for API gateway can be used to authenticate external users

Cognito

A way to build a serverless visual workflow to orchestrate lambda functions

Step Functions

cognito user pools

Cognito identity pools(Federated)

A serverless database of users for your web and mobile apps

Cognito user pool

Cognito users pools integrate with these two services

API Gateway Application Load Balancer

Section 19: Serverless overview Flashcards

(58 cards)