VPS hosting (Virtual Private Server virtual private server), a server will be divided into a number of virtual private server quality services. Each VPS can be assigned an independent public IP address, an independent operating system, an independent oversized space, an independent memory, an independent CPU resource, an independent executive program and an independent system configuration. In addition to the allocation of multiple virtual hosts and unlimited enterprise mailboxes, users have the function of independent servers, which can install their own programs and restart their servers individually. "Cloud hosting" (Cloud hosting) can be seen as a new generation of **** enjoy hosting. First of all, the hosting company will be its hardware and network lines, made into a "cloud", and then provide some access to this "cloud" network interface API, for customers to use. At this point, each customer **** enjoy is no longer a particular server, but all the servers in the cloud. For example, suppose you want to back up your local files to the Internet, you can use the **** enjoy host to transfer the files to a particular server; you can also use the cloud host, through some form of interface, to transfer them to the cloud. In other words, *** enjoy hosting users are directly facing a specific server, while cloud hosting users are directly facing the web interface and can't see inside the server. A common analogy is that you can rent a safe deposit box with the number "8888" from a bank (****hosting), or you can give your valuables directly to a custodial company (cloud hosting) and leave them in their hands. Products such as Gmail, FaceBook, Twitter, Flickr, etc. can be considered as services based on "cloud hosting". Cloud hosts can actually get root access, and users can reinstall and upgrade the operating system, while VPS hosts do not have root access and cannot reinstall and upgrade the operating system. Second, the difference between web hosting, VPS, cloud hosting (1) Provisioning and deployment time Web hosting - days to weeks VPS - instant, no need to install the operating system Cloud hosting --VPS - instant, no need to install the operating system Cloud hosting - instant, can be completed in a few minutes, can be deployed with one click, you can also install the operating system on your own (2) Security and reliability Web hosting - general: rent a white label server failure rate, basically no ARP, Trojan horse and DDOS prevention capabilities, basically no backup machine and data backup services VPS - poor: program defects, ARP spoofing, viruses, resource crowding, etc. installed on other VPS on the same physical server will seriously affect itself; basically no ARP, Trojan horse and DDOS prevention capabilities Cloud hosting -High: built-in ARP prevention, scale up DDOS anti-attack capability; share the performance and reliability of brand-name enterprise-class servers and hardware virtualization, built-in HA; provide standby, snapshots, data backup and other kinds of rapid recovery measures (3) performance and security Web hosting - -Good and guaranteed VPS - Poor: average performance, only for small-scale concurrent access; performance is not guaranteed, easy to suffer from the same physical server on the other VPS squeeze Cloud hosting - - Good and guaranteed: the same physical server
(4) Flexibility and scalability Web hosting - expansion requires re-rental of new servers, but also need to pay for the original rented resources VPS - fast expansion, subject to the limitations of the physical server. -VPS - fast expansion, subject to the configuration of a single server Cloud hosting - instant supply, on-demand expansion, no need to pay for the original rented resources (5) Cost of ownership Web hosting - quarterly and yearly high cost, the need to pass on the deposit for the service provider CapEx expenses; the need to pay a deposit for the service provider to pay for the cost of the service provider. CapEx expenses to pay deposits; need to maintain their own rented servers resulting in higher Opex VPS - the lowest price of low configuration VPS rental; but low security, reliability and unprotected performance leads to unprotected quality of service, operating costs are difficult to control and high Cloud hosting --Cloud hosting - the lowest overall cost: monthly payment without deposit, on-demand use of pay-as-you-go, basically zero maintenance, but also to share the scale, green energy saving, best IT practices to bring the cost advantage (6) easy to use, easy to manage Web hosting - the need for remote control card and only the brand-name machine rental is possible. Virtual host - requires a remote control card and is only possible by renting a brand-name machine, unable to realize centralized and unified management VPS - provides a single stand-alone management interface, no root or super administrator operating system privileges, management flexibility is limited by the management interface Cloud host - built-in KVM, the customer through the KVM, zero maintenance, sharing the cost advantages of scale, green energy, best IT practices Built-in KVM, the customer through the self-service system can be centralized and unified management of cloud hosts distributed around the world; fully owned root or super administrator operating system privileges Three, the advantages of cloud hosting Cloud hosting has three main advantages. (1) Cheap. Because the service can be decentralized to multiple servers, it can make full use of resources, which reduces hardware, power and maintenance costs. Moreover, cloud hosting is billed according to the amount of use, pay more for more use, pay less for less use, so it is especially favorable for small websites. (2) Reliable. Because the service is distributed over multiple servers, or even multiple server rooms, it is not easy to go down completely, has strong disaster tolerance, and can guarantee a long time online. (3) good scalability (scalability).