Cloud Computing

Description:

• Holori - Cross Cloud Management Platform

Vertical scaling vs horizontal scaling:

• Scale up vs scale out
• Bigger machine vs more machines

Public vs Private Cloud

Factors	Public Cloud	Private cloud
Resources	Resources are shared among multiple customers	Resources are shared with a single organization
Tenancy	Data of multiple organizations is stored in the public cloud
Pay Model	Pay what you used	Have a variety of pricing models
Operated by	Third-party service provider	Specific  organization
Scalability and Flexibility	It has more scalability and flexibility
Expensive	less expensive	More expensive
Availability	The general public (over the internet)

Cloud computing categories:

• Comparision:

	Traditional	IaaS	CaaS	PaaS	FaaS	SaaS
Data & config	✅	✅	✅	✅	✅	✅
Application code	✅	✅	✅	✅	✅	🛑
Scaling	✅	✅	✅	✅	🛑	🛑
Runtime	✅	✅	✅	🛑	🛑	🛑
OS	✅	✅	🛑	🛑	🛑	🛑
Virtualization	✅	🛑	🛑	🛑	🛑	🛑
Hardware	✅	🛑	🛑	🛑	🛑	🛑

	Amazon Web Service	Microsoft Azure	GCP
Compute	Amazon EC2, Amazon ECS, AWS Lambda	Azure Virtual Machines, Azure Container Instances, Azure Functions	Compute Engine, Kubernetes Engine, Cloud Functions
Storage	Amazon S3, Amazon EBS, Amazon EFS	Azure Blob Storage, Azure Disks, Azure Files	Cloud Storage, Cloud Bigtable, Cloud Filestore
Databases	Amazon RDS, Amazon DynamoDB, Amazon Aurora	Azure SQL Database, Azure Cosmos DB, Azure PostgreSQL	Cloud SQL, Cloud Spanner, Cloud Firestore
Networking	Amazon VPC, Amazon Route 53, AWS Transit Gateway	Azure Virtual Network, Azure DNS, Azure ExpressRoute	Cloud Networking, Cloud DNS, Cloud VPN
Machine Learning & AI	Amazon SageMaker, Amazon Rekognition, Amazon Comprehend	Azure Machine Learning, Azure Cognitive Services, Azure Databricks	AI Platform, Vertex AI, Cloud AutoML
Serverless Computing	AWS Lambda, Amazon API Gateway, AWS Step Functions	Azure Functions, Azure Logic Apps, Azure Durable Functions	Cloud Functions, Cloud Run, Cloud Workflows
Containers	Amazon ECS, Elastic Container Service for Kubernetes (EKS)	Azure Container Instances (ACI), Azure Kubernetes Service (AKS)	Kubernetes Engine (GKE), Cloud Run
Identity & Access Management (IAM)	AWS IAM, Amazon Cognito	Azure Entra ID, Policies, RBAC (allows for more specific conditions like VM location)	Cloud IAM, Google Cloud Identity
Webapp		App Service	AppEngine

• Viettel Cloud

Ansible vs Terraform