AWS Certification

AWS Certified Solutions Architect Associate exam: numbers and key things to remember

  • Maximum item size is 400KB
  • 25 unique items per transaction
  • Maximum 4MB per transaction
  • gp2 has 16,000 iops max. Size can range from 1GiB to 15 TiB.
  • io1 has 64,000 iops max
  • io1 or io2 type EBS volumes can be shared on up to 16 Nitro EC2 instances
  • Spread placement group: max 7 instance per AZ
  • Partition placement group: max 7 partition per AZ
  • A partition placement group with Dedicated Instances can have a maximum of 2 partitions
  • Cluster placement group: 1AZ only
  • Public IP address change after hibernate or stop, retained if reboot
  • Private IP address stays the same all the time
  • Region bound
  • Performance mode options: General purpose or Max IO
  • Throughput mode options: Bursting Throughput or Provisioned Throughput
  • Idle timeout: 60s default. Allowable range is 1s to 3600s
  • Connection draining: 300s default. Allowable range is 1s to 3600s
  • Retention: 24h by default, but can be configured up to 7 days
  • Maximum size is 1MB per record
  • Maximum 1000 PUT per second per shard
  • Maximum 2MB per second per shard for consumption
  • The total unzipped size of the function and all layers can’t exceed the unzipped deployment package size limit of 250 MB
  • Can have up to 5 layers
  • Maximum execution time is15 mins
  • Max memory 3008 MB, mininum is 128MB
  • Multi thread only start if you allocate 1536MB of memory of above
  • Typically other services can trigger Lambda (push to Lambda model), except for DynamoDB streams & Kinesis. With DynamoDB Streams and Kinesis, you have to configure Lambda to poll the stream (pull from Lambda model)
  • Multi AZ read replica is only for mySQL
  • No Read replica functionality available for MS SQL
  • Auto backup read replica or enable writes only for mySQL and MariaDB
  • Snapshots are not auto deleted on S3
Source: https://docs.aws.amazon.com/AmazonS3/latest/userguide/lifecycle-transition-general-considerations.html
  • Transition down only for objects that have been in previous tier for minimum of 30 days and minimum of128KB in size
  • Glacier retrieval times: Expedited 1–5min, standard 3–5hrs, bulk 5–12hrs
  • Deep archive retrieval times: standard 12hr, bulk 48hr
  • Deep archive: minimum storage duration is 189 days
  • Snowball: 80 TB
  • Snowcone: 8TB
  • Snowmobile is for 10PB or more
  • Queue name maximum length is 80 chars
  • FIFO with no batching: up to 300 msg per second without high throughput mode
  • FIFO batching: up to 3000 msg per second without high throughput mode
  • No api limit for standard queue
  • Retention: 4 days default, configurable from 1min to 14 days
  • Delay: 0 by default, configurable from 0 to 15 min
  • Message timer: 0 by default, configurable from 0 to 15 min
  • Visibility timeout: 30s by default, configurable from 0 to 12hrs
  • Message maximum size is 256kb
  • Long polling (receiveMessageWaitTime) maximum is 20s
  • Standard queue can have up to 120,000 in flight messages
  • FIFO queue can have up to 20,000 in flight messages
  • NAT Gateway is at AZ level (always in public subnet), 45 Gps bandwidth limit
  • NACL is at subnet level
  • NACL default rules: allow all in/out, custom one deny all in/out
  • Default & custom security group: allow all outbound
  • Default security group allows inbound from itself
  • Custom security group has no inbound rules (i.e. implicit deny all)

--

--

--

I.T. Solutions Architecture, Cloud Architecture, Data Architecture

Love podcasts or audiobooks? Learn on the go with our new app.

Recommended from Medium

Configuring Test Suite Separately By The Test Scopes

Flutter Beginner guide

Consider This Historical Flights API For Your Business

Comparing Open Source BGP Stacks

Kubernetes Operators… getting down to business (logic)

At Least I Tried. — Web Development Envelopment

DeFi Lending Protocols: TVL, Rates & Metrics Launching on Amberdata.io

Something brewing on Solana

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store
Adi Simon

Adi Simon

I.T. Solutions Architecture, Cloud Architecture, Data Architecture

More from Medium

Advantage of AWS benefits.

Prepare for AWS Solutions Architect Associate Certification(SAA-C02) in 2022

Embarking on a cloud data migration program — Don’t forget these 3 things!

NACL — Study Notes — SAA-C02