Public cloud advantage
(1) Convenience. Cloud computing has the lowest requirements on the user's device and is the most convenient to use.
Maintain a wide variety of applications on your PC. In order to use some of the latest operating systems, or to use the latest version of a software, we must constantly upgrade our computer hardware. In order to open a document in a format sent by a friend, we had to frantically search for and download an application. In order to prevent the introduction of viruses during download, we have to repeatedly install anti-virus and firewall software. All these troubles add up to a nightmare for a newcomer who is new to the computer and just new to the Internet! If you can't stand this computer experience anymore, cloud computing may be your best choice. You only need to have a computer with internet access and a browser you like. All you have to do is type the URL in your browser and enjoy the fun of cloud computing.
(2) Data sharing. Cloud computing makes it easy to share data and applications across devices
In the cloud computing network application mode, only one copy of the data is stored on the other end of the "cloud". All your electronic devices only need to be connected to the Internet to access and use the same data at the same time. You can use any computer or mobile phone to access your data from anywhere, and then share it with others.
(3) Unlimited possibilities. Cloud computing offers almost unlimited possibilities for us to use the web.
It provides almost unlimited space for storing and managing data, and it provides almost unlimited computing power for all kinds of applications. As a computing model that best reflects the spirit of the Internet, cloud computing will surely show strong vitality in the near future, and will change our work and life in many ways.
Public cloud shortcomings
(1) Security
We will verify that the company's proprietary data viewing and control is truly owned by the enterprise. In order to prevent the supplier from facing certain uncertainties and causing data loss, we will still back up on our own computer. This is a waste of resources.
(2) Performance
If you use a public cloud, then the vendor is not serving a certain enterprise, so that multiple companies are running, and the application system performance will be as expected at the peak time? This is another issue worth exploring.
(3) Data data ownership
Is the ownership of the "cloud" the ownership of the data on the system platform?
(4) Reliability
An enterprise can deploy many data centers and redundant systems to meet the needs of uptime. Will companies offering "cloud" services offer the same services?
(5) Consistency
More and more companies in the public enterprise, financial services, and health sectors are faced with strict regulations; they need to be able to prove who accessed the data, when and where it was processed, and when processing the data, What software and hardware are needed. In the internal database of the enterprise, it is very difficult to do this. Can they allow the same work in the cloud? More likely, for important applications, companies will deploy web-based access mechanisms to run these applications in the current hosted location. As for application updates, companies may create an enterprise internal cloud. Only after they fully experience this kind of real-time demand resource service and pay-per-use work environment, they may assign some work to the external cloud. If it is necessary to deploy part of the workload on the external cloud, they will consider this. do. Before these companies take the next step in this direction, they will try their best to find the right tools to create their own internal cloud.
Private cloud advantage
(1) Security
A private cloud is built for a single customer, and the private cloud's servers are still behind an external firewall, and your database server stays behind another firewall, giving them double security. For large enterprises, business-related data is their lifeline, so in the short-term, large enterprises will not put some related applications on the public cloud. Private clouds are very advantageous in this regard.
(2) Quality of service
Because private clouds are usually behind a firewall, not in a remote data center, when a company employee accesses a private cloud-based application, its SLA should be very stable and unaffected by network instability, such as The last "storm video" incident led to massive disconnection.
(3) Make full use of existing hardware resources and software resources
Everyone knows that every company, especially large companies, has a lot of legacy applications, and most of the legacy is its core application. Although public cloud technology is very advanced, it does not support legacy applications, because many are written in static languages, mainly Cobol, C, C++ and Java, while existing public clouds support these languages ​​very much. general. But private clouds are good in this regard, such as the cloudburst launched by IBM, through cloudburst, it is very convenient to build a Java-based private cloud. And some private cloud tools can use the company's existing hardware resources to build the cloud, which will greatly reduce the cost of the enterprise.
(4) Process that does not affect existing IT management
For large enterprises, the process is the core of its management. If there is no perfect process, the enterprise will become a loose sand. Not only are business-related processes very numerous, but there are also many processes in the IT department, such as those related to Sarbanes-Oxley, and these processes are critical to the IT department. In this regard, the public cloud is very disadvantageous, because if you use the public cloud, it will have a lot of impact on the IT department process, such as data management and security regulations. In the private cloud, because it is generally inside the firewall, it has little impact on the IT department process.
Private cloud shortcomings
(1) high cost
Establishing a private cloud may include upfront costs, usage fees, and maintenance and management resources. Therefore, the cost is relatively high.
(2) poor social sharing
Private cloud means that users are connected to local resources, local connections or through remote connections, so there are fewer connections with the community.
Hybrid cloud advantages
(1) Flexible operation
A hybrid cloud is a combination of public, private, or public clouds in a target architecture. So you can run critical business on a private cloud and develop and test it on a public cloud. High operational flexibility.
(2) Flexibility
High-peak and high-load work tasks can be run on public clouds.
Hybrid cloud disadvantage
(1) Less available products and services
The development process of hybrid cloud is not very long, and there are not many products and services available for practical use.
(2) Security is not strong
Security control between the private cloud and the public cloud; some of the concerns are the same as the public cloud.
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