How to explain cloud computing in layman s terms: public cloud, private cloud, hybrid cloud

Infrastructure as a Service (IaaS): IaaS (Infrastructure as a Service), consumers can obtain services from a well-established computer infrastructure through the Internet, this kind of service is called Infrastructure as a Service. Internet-based services, such as storage and databases, are part of IaaS.

For example: Yimai Cloud).

Platform-as-a-Service (PaaS) :p AAS is an abbreviation for Platform-as-a-Service, which means Platform-as-a-Service. A business model that provides a server platform as a service.

The service provided by the program through the network is called SaaS (Software as a Service), and the corresponding server platform or development environment provided as a service in the cloud computing era is called PaaS (Platform as a Service).

Software as a Service (SaaS): SaaS is the abbreviation of Software-as-a-Service (Software as a Service), with the development of Internet technology and the maturity of application software, a completely innovative software application model that began to emerge in the 21st century. It has a similar meaning to "on-demand software", "ASP", "hosted software".

It is a mode of providing software through the Internet, the manufacturer deploys the application software on its own server, and the customer can order the required application software services from the manufacturer through the Internet according to their actual needs, pay the fee to the manufacturer according to the number and length of time of the ordered service, and obtain the services provided by the manufacturer through the Internet.

Public cloud. The public cloud is built for the public, and all users are called tenants, not only there are many tenants at the same time, but also when a tenant leaves, its resources can be immediately released to the next tenant, just as a table of customers in a hotel will welcome the next table of customers when they leave. The public cloud is the most thorough division of labor in society, enabling resource optimization on a large scale, so the future is always bright, no matter how tortuous the road may be.

Of course, the public cloud, especially the underlying public cloud construction, is not something that ordinary people can play, just like anyone can open a restaurant with three or five tables, and opening a restaurant with three or five thousand tables depends on funds and ability. Many customers are worried about the security of the public cloud, and sensitive industries and large customers can consider it, but the general small and medium-sized customers, whether it is the risk of data leakage or the risk of stopping services, the public cloud is far smaller than setting up their own computer room.

What are the benefits of cloud hosting.

The advantages of cloud servers are based on cloud computing technology, and compared with independent servers, they have the following characteristics:

For example, Yimai Cloud launched a permanent activity for enterprises to purchase cloud servers for 0 yuan).

1. From the technical aspect: cloud computing technology is used in cloud computing technology, and cloud computing technology integrates various software and hardware technologies such as computing, network, and storage. Dedicated servers, that is, independent, do not integrate these resources.

2. From the security aspect: the cloud server has natural anti-ARP attacks and MAC spoofing, snapshot backup, and data will not be lost permanently. Dedicated servers, on the other hand, don't have this feature;

3. In terms of reliability: cloud servers are based on server clusters, so the hardware redundancy is high and the failure rate is low; Dedicated servers, on the other hand, have less hardware redundancy and a higher failure rate.

4. In terms of flexibility: users can increase their own configuration in real time, and there is a large space for expansion; Dedicated servers, on the other hand, have limitations in this regard, and if you have a new application, you have to buy another one.

5. From the perspective of performance: the cloud server is 4 times the computing power of the same configuration of independent servers, which can meet the requirements of high-performance computing;

6. From the perspective of stability, cloud servers can be automatically migrated due to failures, which means that if a cloud server fails, the applications on it will be automatically migrated to other cloud servers. Dedicated servers don't have this function, and if they do, they will go down.

7. From the perspective of energy saving, the automatic migration technology of cloud servers based on cloud computing means that at night, the utilization rate of physical servers is not high, and the automatic migration technology will concentrate the application on several physical servers, and other physical servers can be dormant, so as to save energy.

Public and private clouds are two ways in which cloud services exist (and hybrid clouds). A public cloud is a service provided by a third party, while a private cloud is a cloud service built into an enterprise for its own use. For example, the public cloud is a bus, and the private cloud is a private car, and the distinction between public and private is mainly reflected in the following points:

1.Server.

Just like a bus, the public cloud serves many businesses and individuals, as long as you buy a ticket, you can get on the bus. You can buy cloud services provided by third parties for money. Private cloud, on the other hand, only serves business owners.

2.Build location.

The construction of the public cloud is determined by the third party, and the third-party enterprise that provides you with services builds the cloud service, and if necessary, you can obtain it through the Internet. A private cloud is built behind an enterprise's firewall. Similar to a garage for private cars.

3.Confidentiality.

Because of 2, if you don't want to put your privacy in a place where you can't control it, a private cloud provides such a viable solution. The private cloud is completely under the control of the enterprise itself. At this point, the public cloud is a public place, you spend money, I serve, the party providing the service builds the infrastructure, the service provider only uses it, and the maintenance and other work are the responsibility of the service provider.

Private clouds, on the other hand, require enterprises to hire professional O&M teams to maintain them.

The analogy to a private car is that it can be casual in a private car, ensuring basically absolute confidentiality; At the same time, refueling and maintenance have to come by yourself. As for the bus, the confidentiality is definitely poor, but it is very convenient to buy a ticket and get on the bus, and you don't have to refuel and wash the car yourself. The subheading of practicality may be misunderstood, but I can't think of a better name.

What I want to mean is that the question of how much public and private clouds use their performance is a matter of utilization. The public cloud has a wide range of users, but the demand is not concentrated, and the private cloud will face problems such as expansion. An example that I can think of for the time being is Alibaba Cloud Service, where the performance required by the server in the face of the impact of Double 11 must be multiplied by the performance required by the usual one, so there is a server performance selection problem, which probably leads to the direction I want to express.

There are three deployment models for cloud computing:Public, private, and hybrid clouds。When migrating to the cloud, there are different aspects to consider for each deployment model.

Public cloud.

The service is available through the public Internet and can be used by anyone who wants to make a purchase. Cloud resources, such as servers and storage, are owned and operated by third-party cloud service providers and are made available over the Internet.

Private cloud

A private cloud is made up of computing resources that are dedicated to the users of an enterprise or organization. A private cloud can be physically located in an organization's on-site (on-premises) data center or it can be hosted by a third-party service provider.

Hybrid cloud

A hybrid cloud is a computing stool environment that allows data and applications to be shared with each other, bridging public and private clouds.

Public cloud.

Summary. Public cloud.

Cloud service providers deploy IT infrastructure and operate and maintain it, and provide standardized and undifferentiated IT resources carried by the infrastructure to public customers.

The core feature of public cloud is that the ownership of infrastructure belongs to the cloud service provider, and cloud resources are open to the public, and any qualified individual or organization can lease and use cloud resources without the operation and maintenance of underlying facilities. The advantages of public cloud are low cost, no maintenance, easy to use and easy to expand, which can meet the needs of most customers such as individual users and Internet enterprises.

Public clouds, private clouds, and hybrid clouds are the same and different.

The public cloud cloud service provider deploys the IT infrastructure and operates and maintains it, and provides the standardized and undifferentiated IT resources carried by the infrastructure to the public customers. The core feature of public cloud is that the ownership of infrastructure belongs to the cloud service provider, and cloud resources are open to the public, and any qualified individual or organization can lease and use cloud resources without the operation and maintenance of underlying facilities. The advantages of public cloud are low cost, no maintenance, easy to use and easy to expand, which can meet the needs of most customers such as individual users and Internet enterprises.

A product delivery model in which a private cloud service provider builds an IT infrastructure for a single customer, and the corresponding IT resources are only available to the customer's internal employees. The core feature of a private cloud is that cloud resources are available only to one customer and are not accessible to other customers. Because the infrastructure in the private cloud mode is separated from the outside, the security and privacy of data are stronger than those of the public cloud, which meets the needs of government agencies, financial institutions and other customers with high requirements for data security.

Hybrid cloud users use both public and private cloud models. On the one hand, users build a private cloud in a local data center to process most of their business and store core data. On the other hand, users obtain public cloud services through the network to meet the demand for IT resources during peak periods. Hybrid cloud is widely welcomed by large enterprises with complex requirements because it can deploy Internet-based applications and deliver the best performance, take into account the security and reliability of private cloud on-premises data centers, and have more flexibility to choose cloud deployment models based on the workloads of various departments.

1. The public cloud is placed on the Internet, as long as it is a registered user or a paid user, it can be used;

2. The private cloud is placed in a private environment, such as enterprises, organizations, etc., which are established in the computer room, or built by the operator, but rented to a certain organization as a whole. Users other than the enterprise, organization, **, etc., cannot access or use it;

3. Hybrid cloud is a mixture of public cloud and private cloud, most of which means that the private cloud has been built, but many resources (computing power or storage space) are insufficient, so you have to dynamically apply for public cloud on the public network as a supplement to your own private cloud.

Public cloud, private cloud, and hybrid cloud are all ways of cloud deployment, and there are several main differences.

Public cloud: The public cloud is to put the built cloud resource pool on the Internet, and all users (or free users or paid users) who have the right to use it can use it on demand.

Private cloud: Enterprises such as enterprises, enterprises, organizations, etc. are built separately in their own data centers, or built by cloud service providers through user needs, and then rented to an organization as a whole, and cannot be used by users other than the owner;

Hybrid cloud: refers to the hybrid of public cloud and private cloud, most of which refers to the fact that after the private cloud is built, due to business development and other reasons, many resources (computing power or storage space) are insufficient, and it is necessary to apply for the use of public cloud as a supplement to the private cloud.

To put it simply, a public cloud is an open space, a private cloud is a private space, and a hybrid cloud is a solution that combines public and private clouds. The better ones in China, such as Babel Bird Enterprise Network Disk, will provide suitable cloud deployment solutions according to the needs of enterprises.

Public cloud.

Public cloud usually refers to the cloud that third-party providers provide users with that can be used, public clouds are generally available through the Internet, may be free or low-cost, and the core attribute of public cloud is shared resource services. There are many instances of this cloud that can be served across today's entire open public network.

Private cloud: A private cloud is built for individual use by a single customer, thus providing the most effective control over data, security, and quality of service. The company owns the infrastructure and can control how applications are deployed on this infrastructure. Private clouds can be deployed within the firewall of a corporate data center or in a secure colocation location, and the core attribute of a private cloud is dedicated resources.

Hybrid cloud: Hybrid cloud is a blend of public and private clouds. We already know that private enterprises are mainly for enterprise users, for security reasons, enterprises prefer to store data in the private cloud, but at the same time want to have access to the computing resources of the public cloud, in this case hybrid cloud is more and more adopted, it will mix and match public cloud and private cloud to get the best results, this personalized solution, to achieve the purpose of both saving money and security.