Data center four disaster preparation technology decryption

Today's data center-hosted business is becoming more and more important, and introducing effective disaster preparedness technologies is essential to effectively reduce the loss of data center failures. Data center overall disaster recovery technology can be divided into the following four kinds:

1. Cold Standby
Cold standby technology is a frequently used disaster recovery technology for small and medium sized data centers or ringtones that carry business. The use of cold standby technology site is usually empty site, generally used for emergency situations, or simply wiring, power-on equipment. In this way data center business recovery time is difficult to guarantee, sometimes the temporary platform can also be caused by the instability of the interruption. However, this approach does not need to prepare a large number of idle equipment, maintenance costs can be negligible. But at present, cold standby technology has become more and more unable to adapt to the development of high data center requirements, and gradually became a phased out technology. ITU 15914136975

2. Warm standby
The warm-up technology is based on the primary and standby data center, provided that there are two primary and standby data centers. Standby Data Center is a warm standby deployment, the application business is the main data center response, when the main data center failure caused the business is not available, need within the specified RTO time to achieve the overall data center switching. When implementing a primary and standby datacenter switchover, you need to disconnect the primary datacenter routing link and connect the alternate Datacenter Routing link to ensure that only one data center is online at the same time. Warm standby technology or manual way, the operation requires someone 24 hours on duty to complete, the work effect is low.

3. Hot standby
Compared to warm standby, the most important feature of the hot standby is to achieve the overall automatic switching, the other warm and ready to achieve the basic consistency, to achieve a hot standby data center is only more than the warm standby data center to deploy a software, software can automatically perceive data center failure and ensure that the application business automatically switch. The business is responded by the main data center, and when a data center failure causes the business to become unavailable, it needs to be automatically switched to the standby data center within the specified RTO time.

4. Double Live/multi-Live

Through the dual-live technology can realize the primary and standby data center are external services, the normal operation of the two data center business can be load-sharing according to the weight, there is no main preparation of the points, respectively, response to a subset of users, weights can be divided by geographical, or data center service capacity or external bandwidth. When one of the data centers fails, the other data center will assume all the business. In addition to the dual-live technology and the multi-live technology, multi-Live is the business in multiple data centers running concurrently, when there is one or more data center failure, other data centers will automatically take over all applications business. In particular, the multi-live technology deploys many kinds of fault detection methods, also can detect the running state of the server, server load balance in real-time, even if there is no fault, it can be adjusted between the multi-live data center according to the application traffic. The greatest feature of multi-activity is that the data center is not wasting resources, and the data center is carrying the application business operation. But the cost of inputs will be high, the technology is more complex, now in the financial industry, the Internet industry data centers are happy to adopt the multi-live technology.

Data center four disaster preparation technology decryption