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This article introduces the knowledge of "what's the difference between CVM and vps?". In the operation of actual cases, many people will encounter such a dilemma. Next, let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

VPS:VPS is the abbreviation of Virtual Private Server, which translates to "virtual private server". It means that virtual server software (such as Hyper-v, VMware, XenServer, Virtuozzo, etc.) creates multiple small servers isolated from each other on a physical server. These small servers (VPS) have their own operating system, which runs and manages exactly the same as stand-alone servers.

CVM: CVM is an IT infrastructure capacity leasing service that integrates computing, storage and network resources, and can provide server leasing services based on cloud computing model for on-demand use and on-demand payment. A CVM is a virtual part similar to an independent host on a cluster composed of several servers. it has the characteristics of high reliability and flexibility.

As you can see, it is still not clear what the difference is. In fact, a CVM is an upgraded alternative to VPS. The difference between the two is mainly reflected in the following aspects:

First, infrastructure determines performance differently: first of all, we need to understand the concept that the performance of VPS is limited by its own physical server. If there is a problem with the server, VPS will go wrong, and the above website will also be affected. On the other hand, the CVM is established on the cluster server, and the failure of one server does not affect the operation of the CVM.

Second, the storage mode is different: because the CVM is based on cluster servers, it uses network distributed storage. On the other hand, VPS stores the data on the hard disk of the local physical server, and only one copy of the data is stored. Once it is damaged, it will not work properly. This is the essential difference between a CVM and a VPS.

Third, the reliability is different: the CVM is supported by multiple servers, which can achieve hot spot migration and automatic switching of failed nodes, and the reliability is much higher than that of VPS. VPS cannot do this because it is limited to a single server. When the server needs to be upgraded or restarted, the operation of the CVM will not be affected, which can ensure the normal operation of the website. On the other hand, VPS needs to be interrupted and can not continue to run until the server is restored, which is a waste of time. When a computing node fails, the CVM can automatically switch to another node without impact, but VPS can only be interrupted, which may also cause data corruption.

Fourth, the support for private network and image is different: the CVM naturally supports the private network, and the data is transferred very fast in the private network, which is conducive to the implementation of load balancing, and the CVM can also quickly clone multiple system images. Due to architectural differences, it is difficult for VPS to support private network, let alone custom images.

5. Different upgrade methods: because the CVM is virtualized and exists in the network, it is easy to expand the capacity in place and upgrade the configuration of bandwidth, hard disk, CPU and so on. However, the expansion capacity of VPS is limited due to the limitation of the parent machine. In terms of upgrade time, the CVM can be fully automated within a few minutes online, while VPS takes longer.

Apart from these aspects, the difference between CVM and VPS is that CVM is better than VPS in terms of hard disk I IP O read speed, configuration time and addition of independent CVM, which is more advantageous for website access.

We can think of the CVM as a well-trained department and VPS as a single soldier. In combat, a well-trained army, comrades-in-arms can support each other, which is more effective than the sum of the whole. On the other hand, individual soldiers can only rely on themselves, and the implementation effect is limited by their own quality, and it is certainly not as good as an army. This is the image of the difference between a CVM and a VPS.

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