Shulou(Shulou.com)06/02 Report--

Today, I will talk to you about what is an official image of a CVM. Many people may not know much about it. In order to make you understand better, the editor has summarized the following for you. I hope you can get something from this article.

Cloud server image is a technology for business continuity, disaster recovery and backup. The image content can be a system, CD, software, website or even a server. A cloud image is a copy of server data created in the cloud, mainly used to create a fault-tolerant and redundant server computing infrastructure.

In the past, after users started the CVM, they had to configure the environment and install the software themselves, which was tedious and time-consuming. Now, by activating the CVM through the image, you can obtain a system environment or software consistent with the instance, thus avoiding complex cloud configuration problems and realizing the instant use of the CVM ESC. In addition to backup and disaster recovery, cloud mirrors can also be used for load balancing by providing the same data for quick download to remotely connected users.

So, as an important server data backup mechanism, what is the difference between mirroring and traditional cloud snapshot?

To put it simply, snapshot is a point-in-time-based data copying technology, which mainly records and saves the data information at a particular time. Snapshot technology is divided into physical copy and logical copy, in which physical copy snapshot and mirror work in the same way, copying the contents of a target data source to other places.

But the difference is that the snapshot only copies the data at a specific time, and cannot record the data changes after that, while the mirror needs to ensure the consistency of the target data and the copied data at all times. The goal of a snapshot is to restore system data to a certain time before the error occurs, while the purpose of mirroring is to ensure data redundancy and recover quickly in the event of a data source failure.

When the user's target data source is damaged, the CVM snapshot rolls back to the previously modified data, and the mirror can restore it completely to ensure the continuity of the business.

In practical application, because the cloud image integrates the server instance system environment and various pre-installed software functions, and the cloud image is used with the server lease, users only need to carry out a simple operation to easily realize the business on the cloud. Typical application scenarios of cloud images, such as native system installation, software packaging and deployment, service batch customization, and so on.

The CVM has powerful cloud snapshot and cloud mirroring services. Four copies of CVM data are written in real time. Combined with multiple snapshot backups, a backup strategy covering software and hardware failures is formed, subverting the traditional operation and maintenance mode and ensuring data security in an all-round way.

After reading the above, do you have any further understanding of what is the official image of a CVM? If you want to know more knowledge or related content, please follow the industry information channel, thank you for your support.

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