When is it appropriate to replace a virtual machine with a virtual machine?

　　 For webmasters who have just entered the construction industry , In order to reduce operating costs , They often choose relatively cheap virtual hosts at the beginning . Shared virtual hosts do provide some great features , But its business model also has some limitations . With the development of website business ( The demand for elastic expansion of enterprise website resources ), Virtual hosts have become increasingly difficult to meet , You may need to replace it with a virtual machine later . What is the difference between virtual host and virtual machine , When is it suitable to replace virtual machine with virtual machine ?

　　 Virtual host vs Virtual machine

　　 One 、 Network resources

　　 Generally speaking , Virtual hosts are shared resources ( Storage 、 Memory 、 Processor, etc ), Users need to share with other users of the server , Resources will certainly be more limited .

　　 The virtual machine enjoys exclusive resources ( The software and hardware resources of the entire server ), Independent IP, Network resources can also be expanded elastically .

　　 Two 、 Safety and stability

　　 Use virtual hosts to share resources with others , Especially sharing IP when , It may lead to joint attack , Suffer all losses , There is no guarantee that the website will always run stably .

　　 In contrast, the virtual machine is more stable , For example, the system detects that the underlying physical machine where the ECS is located has failed , It will automatically trigger protective migration , Automatically taken over by other available clusters .

　　 Moreover, the anti attack capability of virtual machine is also higher than that of virtual machine ( Virtual machine redundant storage , Multi point backup , Eliminates single point of storage failure ). In addition, at present, many service providers , For example, HENGCHUANG Technology , Also provide DDOS High prevention IP, It can provide simple and fast large flow DDoS Attack protection services . Even non HENGCHUANG products can be used .

　　 3、 ... and 、 Dominate the right of definition

　　 Using virtual hosts has common settings , Without the right to control the definition , Make configuration changes to the server 、 There are great restrictions on installing additional tools, etc . And use virtual machine , Have complete root jurisdiction , Users can also flexibly select the corresponding configuration according to the website scaling requirements , Pay as you go , It greatly reduces the waste of cost .

　　 When is it appropriate to change to a virtual machine ?

　　1. As your website continues to grow , When the traffic resources required at ordinary times exceed the traffic resources of the virtual host .

　　 Every website visitor consumes resources , However, the limited shared host resources are not enough to support a large number of users' access , At this time, the virtual machine needs to be replaced , Get exclusive resources , Without having to share CPU、 Server resources such as memory or any data . And if it is a foreign trade e-commerce platform , We should also consider the sharp increase in traffic caused by the peak period of future promotional activities .

　　2. When the website needs stronger security and reliability .

　　 From the difference between the security and stability of virtual machines and virtual machines mentioned above, we can also see that the security and reliability of virtual machines is higher than that of virtual machines , It can provide a better running environment for the website .

　　3. When you need complete control over your server performance and configuration , The virtual machine can be replaced , Enjoy full administrative privileges .

　　 summary ： When the situation described above occurs on the website , It indicates that the website is very suitable for replacing virtual hosts with virtual hosts , The flexible scalability of the virtual machine is also a good way to follow the website to develop and scale resources .