What is Amazon Aurora in AWS: RDS Grown Up, When Plain RDS Wins
Amazon Aurora is AWS’s high-performance relational database — a fully managed engine compatible with MySQL and PostgreSQL that delivers up t...
Category: AWS
What is Amazon Cognito in AWS - login without building login
Amazon Cognito is AWS’s identity platform for web and mobile apps — a user directory, an authentication server, and an authorization service...
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Fix AWS CLI Error: Could Not Connect to Endpoint URL (DNS & Region)
If the AWS CLI is throwing Could not connect to the endpoint URL , the cause is almost always one of three things: the region your command i...
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What is an AWS Lambda Cold Start? (Causes & 5 Fast Fixes)
A cold start is the extra bit of time AWS Lambda needs the first time your function runs on a brand-new copy of its environment — it has to...
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What is AWS Auto Scaling? (EC2 Auto Scaling Groups Explained)
Auto scaling is a cloud feature that automatically adds or removes servers to match the traffic your application is actually getting, right ...
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Fix AWS CLI ExpiredToken Error: Session Credentials Guide
The AWS CLI throws ExpiredToken — "The security token included in the request is expired" when the temporary session credentials ...
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AWS Bedrock AccessDeniedException on Claude: Every Fix
AccessDeniedException when invoking Claude models on AWS Bedrock almost always traces back to one of three separate gates that all have to o...
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What Is Amazon AWS SES? Email Your App Can Afford
Amazon SES (the full form is Simple Email Service) is AWS's email-sending platform — your application calls an API or connects over SMT...
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What is TTL in DNS - why your change is not showing
TTL stands for Time To Live, and in DNS it's a number, in seconds, attached to every DNS record that tells any computer or server that l...
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What is a hosted zone in AWS - DNS ownership explained
A hosted zone is the container Amazon Route 53 uses to hold every DNS record for one domain name — it's not the domain itself, and it...
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What is a AWS container vs a VM - decided in one page
A container is not a small VM — it is just a normal process on your computer wearing a disguise. There is no virtual hardware inside it, no ...
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What is serverless in AWS - the honest definition and its limits
Serverless doesn't mean nobody is running a server. It means Amazon Web Services runs it, patches it, and hides it from you completely ...
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What is a managed service - what AWS runs so you do not
A managed service is any AWS offering where Amazon runs the operational layer underneath your workload — provisioning the servers, patching ...
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What is a CloudFormation stack - one folder, many resources
A CloudFormation stack is a single named unit AWS creates from one template file — instead of clicking around the console building a server ...
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What is IaC in AWS - why you stop clicking in the console
Infrastructure as code (IaC) means writing down what you want your servers, databases, and networks to look like in a text file, then having...
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What Is Amazon CloudFront? The Copy of Your Site Everywhere
Amazon CloudFront is AWS's content delivery network — it copies your website's files to hundreds of data centers around the world, s...
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What is a presigned URL in AWS - sharing a private file safely
A presigned URL is a normal-looking web link that lets someone download or upload one specific file in a private Amazon S3 bucket, for a lim...
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What is eventual consistency - the S3 promise, honestly
No — Amazon S3 has not been "eventually consistent" since December 1, 2020. Every PUT, GET, DELETE, and LIST against an S3 object ...
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What is object storage vs block vs file in AWS - S3/EBS/EFS in plain terms
Object, block, and file storage are three different ways of handing your data to a computer, and on AWS they map to three specific services:...
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What is snapshot in AWS - and how incremental saves you money
A snapshot is a point-in-time copy of your data — but on Amazon EBS, only the very first one is a full copy. Every snapshot after that is in...
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