How to Solve: Help the Bookseller Challenge in Python
A bookseller has lots of books classified in 26 categories labeled A, B, … Z. Each book has a code c of 3, 4, 5 or more characters. The 1st …
Read Article →Technical Articles
In-depth guides, insights, and best practices for modern software engineering
How to solve AWS MediaPackage PackagingGroup Quota Limit
If you are using AWS Elemental MediaPackage and hit the following error, then you need to either do one of the following:
Read Article →
Error: error waiting for …
How to Run Cdk Bootstrap
To bootstrap an AWS CDK environment, you simply need to do the following:
npx aws-cdk bootstrap
…for each environment that you would like the …
Read Article →How to Get Account Number from AWS Lambda
If you need to get the current Account Number, or Account ID from within a Lambda execution, then you can access invoked_function_arn from the context …
Building Resilient Distributed Systems
Learn fault tolerance patterns.
Understanding Distributed Systems Failures
Failure Modes and Models
Recognizing what can go wrong:
Common Failure …
Read Article →Summary of the Frequently Used AWS STS API calls
AssumeRole – is useful for allowing existing IAM users to access AWS resources that they don’t already have access to. For example, the user might …
Read Article →Understanding Locking and Conditional Writes in AWS DynamoDB
Optimistic locking is a strategy to ensure that the client-side item that you are updating (or deleting) is the same as the item in DynamoDB. …
Read Article →AWS CodeDeploy Deployment Type Options
CodeDeploy provides two (2) deployment type options:
Option 1 – In-place Deployment
In-place deployment: The application on each instance in the …
Read Article →Defining Amazon ECS Task Placement Strategies
Amazon ECS supports the following task placement strategies:
binpack – Place tasks based on the least available amount of CPU or memory. This …
Read Article →Deployment methods in AWS Elastic Beanstalk
– All at once – Deploy the new version to all instances simultaneously. All instances in your environment are out of service for a short time while …
Read Article →How to update NTP to sync clock on Linux
If you need to sync the clock on Linux using the central NTP clock service, you can do the following:
sudo service ntp stop
sudo ntpd -gq
sudo service …Data Partitioning Strategies for Distributed Systems
Master data partitioning techniques including sharding.
Understanding Data Partitioning
Data partitioning (also known as sharding) is the process of …
Read Article →