Cloud disaster tolerance, as its name implies, is a cloud-based Disaster Tolerance System, which can be either in a remote location or local location.
The cloud disaster recovery system integrates the advantages of a local ha (High Available) system and a remote disaster recovery system, coupled with cloud-based centralized management, centralized data analysis, and other functions, A powerful cloud application is created.
Analysis of traditional disaster recovery Solutions
1. Local ha (local high available)
It is an excellent solution based on local LAN with high availability to ensure local business continuity. Generally, there are two or more nodes, which are divided into active nodes and standby nodes. Generally, an active node is called an active node, while a backup of an active node is called a standby node. When an active node encounters a problem, the Standby node uses the HA policy to take over the task of the active node, ensuring the continuity of local business.
2. Traditional Remote Disaster Recovery
As the name suggests, one or more identical applications or databases are built in different regions to take over the disaster within a certain period of time. Remote Disaster Tolerance plays a role in security and business continuity for enterprise applications and databases. Therefore, it has completely different Disaster Tolerance results from private or public clouds.
3. advantage and disadvantage Analysis
Local ha can solve the high availability of local application disaster tolerance, but the Network Disaster Tolerance is not implemented. If the public network is interrupted, for the HA server in the LAN, it makes little sense and cannot meet the business continuity and high availability.
Traditional Remote Disaster Tolerance is basically based on the LAN ha. You can build a virtual VPN channel in the two locations, or purchase a point-to-point leased line through the ISP for intranet connection between the two locations, and data synchronization. For this disaster tolerance solution, because of the existence of the leased line, the price of the leased line, the bandwidth of the leased line, or the stability of the virtual VPN, this solution is good and bad, and the more stable the VPN, the faster data synchronization between two locations, the higher the price, and the deployment of the same set of hardware equipment in the remote data center. Therefore, the Network stability, investment and maintenance prices have become the biggest obstacle to traditional remote disaster recovery.
Cloud disaster recovery
Analysis of cloud disaster recovery Solutions
It is a set of IT systems with the same functions on the cloud. It can monitor the health status and switch functions between local servers. When a system accident (such as fire or earthquake) stops working, the entire application system can be switched to the backup system on the cloud, so that the customer's system functions and services can continue to work normally.
In terms of the cost of remote construction, all cloud hosts or private cloud solutions are used. The cost of equipment procurement is greatly reduced, which is about 30% of the cost of hardware procurement ~ 40%, or even lower;
In terms of data synchronization, data synchronization is based on the data resumable data transfer technology and direct analysis of database logs and memory, which is converted into SQL statements for data synchronization. This way, network dependence is achieved, this greatly reduces bandwidth costs;
Due to cloud-based centralized management, fast domain name switching can theoretically be achieved in seconds. Later maintenance costs can be ignored;
The cost of software procurement, most of the market's Disaster Tolerance software is about 100,000 to several millions, the cost of software procurement limits most of the projects of customers in need, because cloud Disaster Tolerance uses cloud control, this part of the cost will be greatly reduced.
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Cloud Disaster Recovery Solution