Shulou(Shulou.com)06/03 Report--

What is the method of backing up data on CVM? Many people don't know much about it. Today, in order to give you a better understanding of the method of data backup on CVM, let's summarize the following content. Let's take a look at it.

At present, the mainstream cloud server products mainly provide two ways to back up cloud data, one is cloud snapshot, the other is cloud image.

Taking CVM as an example, there are not only mirrored content used to create fault-tolerant and redundant server computing infrastructure, but also cloud snapshot feature for independent storage of backup data, forming a backup strategy to cover software and hardware failures and ensuring the security of user data in an all-round way.

As an important server data backup mechanism, the difference between mirroring and cloud snapshot functions:

To put it simply, cloud 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.

The difference is that in CVM leasing, snapshots are only copied for data at a specific time, and the data changes after that cannot be recorded. Mirrors need to ensure the consistency of target data and copied data at all times.

The goal of cloud 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 snapshot rollback will lose the newly modified data, and the mirror can recover it completely to ensure the continuity of the business.

On the one hand, all CVM products support custom image feature, which allows users to make images of existing CVMs and use them when business expansion needs to purchase new hosts, avoiding the hassle of repeatedly configuring the host environment.

On the other hand, four copies of CVM data are written in real time. Combined with multiple snapshot backups, snapshot mount is suitable for replacing only part of the disk files. Snapshot rollback applies to all files on the recovery disk as a whole. Effectively solve the data hidden dangers caused by various physical / logical security threats.

As a senior professional cloud computing service provider and cloud security service provider in the industry, it is committed to providing cloud servers for Internet enterprise users and enterprise users in traditional industries. Its products have the characteristics and advantages of "security and stability, easy to use, high service availability, high performance-to-price ratio" and are designed to be customized for enterprises to meet the needs of rich and diversified application scenarios.

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