6.4 KiB
6.4 KiB
What is Cloud-Computing?
- A model that enables businesses to acquire resources for their IT infrastructure needs on demand
- Cloud resources: Servers, storage, databases, netwroks, software applications, and so on
- Ensures the instantaneous availability of resources with lower cost and operational overhead
Benefits
- Cost Savings
- Helps you reduce capital investment
- Reduces hardare and software procurement, which further eliminates the need for power and cooling systems
- Provides cloud services on demand and you are only charged when you use the service
- Data Loss Prevention
- Cloud computing allows you to store your organizations' valuable data in the cloud rather your own data center storage hardware
- The cloud provider's data storage solutions typically offer better access, redundancy, and availability than enterprise data centers
- These solutions help prevent data loss through malfunction, viruses, user errors, or theft
- Scalability
- Cloud computing enables you to increase or decrease IT infra resources according to your business needs
- Both manual and automatic scaling options are available with most cloud providers
- Flexibility
- IT organiztions traditionally focus on various responsibilities, from procuring, hosting, and maintaining IT infra to custumer support and security
- 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
- Security
- Cloud providers offer data protection services like data encryption and policy-based user management, making cloud security equivalent to conventional systems
- Data Analytics
- Cloud computing technology generally includes analytics and reporting, which helps track usage
- This feature allows you to indentify areas of improvement, meet your business goals, and increase organizational efficiency
- Collaboration
- Cloud computing allows users from different geographic locations to work as a team and collaborate easily and effectively
- This speeds delivery of applications to market
- Data Recovery
- Cloud computing provides features and technologies that help companies recover data lost during natural disasters, power outages, and other unforeseen emergencies.
- Mobile Access
- Cloud applications can provide mobile access to corporate resources
- This feature is beneficial for employees and customers, allowing them to access a cloud application from anywhere
Use Cases
- Faster Testing and Deployment
- Remote Working
- Cloud Communication
What is a Cloud Application?
A cloud application is a software program that runs in the cloud and is accessed remotely over the network. It has all the functionality of a non cloud based application with the added advantage of being delivered over the network.
Cloud Economics
Cloud computing reduces capital expenditures ( CapEx ) by eliminating the need to run and maintain your own infrastructure Your costs shift to operating expenses ( OpEx ), which are generally lower as you only pay for the resources you consume
Operational Efficiencies
- Reduces Capital Expenses
- Reduces Staffing Costs
- Improves Productivity
What is a Distributed System?
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 Note - Cloud computing is based on the distributed systems model
Types of Distributed Systems
- Peer-to-Peer -> in the peer-to-peer architectural model, responsibilities are uniformly distributed among machines in the system.
- Client-Server -> In the client-server model, data on the server is accessed by clients.
- Three-tier -> The three-tier architectural model enables information about the client to be stored in the middle tier.
- N-tier -> The n-tier architecture allows an application or server to forward requests to additional enterprise services on the network.
Centralized v/s Distributed Systems
Workloads
- The amount of work allocated to a defined computing task at any given time
- An isolated computing task that is executed indepenedently without any support from external programs or applications
Edge Computing :
- Is a distributed computing model that brings compute and storage workloads closer to the user
- Decreases latency and saves bandwidth
- Processes information close to the edge and decentralizes a network
Workloads in distributed systems :
- Are distributed among the available IT resources based on the utilization of each resource
- Uses an algorithm that consumes runtime logic and distributes the workload among the available IT resouces evenly
Bare Metal Server
- A physical server assigned to a single tenant
- Can be modified based on the need for performance and security
- Isolates resources from other tenants and provides security to your business
- Can be configured for different cloud setups
Cloud Implementations
Types of Cloud
Public Clouds
- Public Clouds are environments where network infra and resources are made accessible to the public
- Resources are partitioned and distributed amongst multiple customers or tenants
Private Clouds
- Private Clouds environments are privately owned and hosted by an enterprise.
- Resources are genrally made accessible to a private organization and their customers and partners
- Managed private clouds are deployed and fully managed by a third-party, reducing the IT staffing needs for the enterprise
- Dedicated private clouds are hosted on a public or private cloud to server a particular department within an enterprise
Hybrid Clouds
- 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 )
- Offer flexibilty in deployment options by enabling workloads to move between private and public clouds based on computing needs
Multi Clouds
- Multiclouds are cloud envirenments that offer more than one cloud service from more than one public cloud service provider
- Resources are deployed accross different cloud availabilty zones and regions
- All Hybrid Clouds are Multi Clouds