135 lines
6.4 KiB
Markdown
135 lines
6.4 KiB
Markdown
# What is Cloud-Computing?
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- A model that enables businesses to acquire resources for their IT infrastructure needs on demand
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- Cloud resources: Servers, storage, databases, netwroks, software applications, and so on
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- Ensures the instantaneous availability of resources with lower cost and operational overhead
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## Benefits
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1. Cost Savings
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- Helps you reduce capital investment
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- Reduces hardare and software procurement, which further eliminates the need for power and cooling systems
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- Provides cloud services on demand and you are only charged when you use the service
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2. Data Loss Prevention
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- Cloud computing allows you to store your organizations' valuable data in the cloud rather your own data center storage hardware
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- The cloud provider's data storage solutions typically offer better access, redundancy, and availability than enterprise data centers
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- These solutions help prevent data loss through malfunction, viruses, user errors, or theft
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3. Scalability
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- Cloud computing enables you to increase or decrease IT infra resources according to your business needs
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- Both manual and automatic scaling options are available with most cloud providers
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4. Flexibility
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- IT organiztions traditionally focus on various responsibilities, from procuring, hosting, and maintaining IT infra to custumer support and security
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- Because these services are made available as managed services by the cloud provider, organizations can focus on their actual business and not IT management issues
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5. Security
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- Cloud providers offer data protection services like data encryption and policy-based user management, making cloud security equivalent to conventional systems
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6. Data Analytics
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- Cloud computing technology generally includes analytics and reporting, which helps track usage
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- This feature allows you to indentify areas of improvement, meet your business goals, and increase organizational efficiency
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7. Collaboration
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- Cloud computing allows users from different geographic locations to work as a team and collaborate easily and effectively
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- This speeds delivery of applications to market
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8. Data Recovery
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- Cloud computing provides features and technologies that help companies recover data lost during natural disasters, power outages, and other unforeseen emergencies.
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9. Mobile Access
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- Cloud applications can provide mobile access to corporate resources
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- This feature is beneficial for employees and customers, allowing them to access a cloud application from anywhere
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## Use Cases
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- Faster Testing and Deployment
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- Remote Working
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- Cloud Communication
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# What is a Cloud Application?
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A cloud application is a software program that runs in the cloud and is accessed remotely over the network.
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It has all the functionality of a non cloud based application with the added advantage of being delivered over the network.
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# Cloud Economics
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Cloud computing reduces capital expenditures ( CapEx ) by eliminating the need to run and maintain your own infrastructure
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Your costs shift to operating expenses ( OpEx ), which are generally lower as you only pay for the resources you consume
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# Operational Efficiencies
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- Reduces Capital Expenses
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- Reduces Staffing Costs
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- Improves Productivity
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# What is a Distributed System?
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A distriuted computing system consists of multiple independent software components. These independent software components are located on different systems that communicate in such a way that they appear as a single system to the end user
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Note - Cloud computing is based on the distributed systems model
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### Types of Distributed Systems
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1. Peer-to-Peer -> in the peer-to-peer architectural model, responsibilities are uniformly distributed among machines in the system.
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2. Client-Server -> In the client-server model, data on the server is accessed by clients.
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3. Three-tier -> The three-tier architectural model enables information about the client to be stored in the middle tier.
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4. N-tier -> The n-tier architecture allows an application or server to forward requests to additional enterprise services on the network.
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# Centralized v/s Distributed Systems
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# Workloads
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- The amount of work allocated to a defined computing task at any given time
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- An isolated computing task that is executed indepenedently without any support from external programs or applications
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### Edge Computing :
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- Is a distributed computing model that brings compute and storage workloads closer to the user
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- Decreases latency and saves bandwidth
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- Processes information close to the edge and decentralizes a network
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### Workloads in distributed systems :
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- Are distributed among the available IT resources based on the utilization of each resource
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- Uses an algorithm that consumes runtime logic and distributes the workload among the available IT resouces evenly
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# Bare Metal Server
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- A physical server assigned to a single tenant
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- Can be modified based on the need for performance and security
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- Isolates resources from other tenants and provides security to your business
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- Can be configured for different cloud setups
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# Cloud Implementations
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# Types of Cloud
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## Public Clouds
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- Public Clouds are environments where network infra and resources are made accessible to the public
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- Resources are partitioned and distributed amongst multiple customers or tenants
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## Private Clouds
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- Private Clouds environments are privately owned and hosted by an enterprise.
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- Resources are genrally made accessible to a private organization and their customers and partners
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- Managed private clouds are deployed and fully managed by a third-party, reducing the IT staffing needs for the enterprise
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- Dedicated private clouds are hosted on a public or private cloud to server a particular department within an enterprise
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## Hybrid Clouds
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- Hybrid Clouds are cloud environments that appear as a single cloud although they are built from multiple clouds ( connected through LANs, WANs, VPNs and/or APIs )
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- Offer flexibilty in deployment options by enabling workloads to move between private and public clouds based on computing needs
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## Multi Clouds
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- Multiclouds are cloud envirenments that offer more than one cloud service from more than one public cloud service provider
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- Resources are deployed accross different cloud availabilty zones and regions
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- All Hybrid Clouds are Multi Clouds
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# Top Public Cloud Providers
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## Microsoft Azure
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## Amazon Web Services
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## Google Cloud
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## Others Public Cloud Providers
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## Cloud Connectors
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