What is a dual live data center

For the purpose of disaster preparedness (disaster Recovery), 2 (or more) data centers are generally built. One is the primary data center for the user's business, one is the backup data center used to back up the primary data center data, configuration, business, and so on. There are typically three backup methods between primary and standby data centers. Case, only the primary data center assumes the user's business, at this time the data center in the primary data center for real-time backup, when the primary data center is hung, the data center can automatically take over the main data center of the business, the user's business will not be interrupted, so also do not feel the data center switch. , it is only the primary datacenter that assumes the business, but the standby datacenter does not make a real-time backup of the primary datacenter, which can be backed up periodically or not at all, and if the primary data center is hung up, the user's business is interrupted. Is that the backup data center is too wasteful to do backups, so that the main two data centers are responsible for the user's business at the same time, the primary and standby two data centers for each other backup, and real-time backup. In general, there may be more load on the primary data center, such as sharing 60~70% business, and the data center only shares 40%~30% 's business. Hardware facilities + software systems, hardware, such as the words of manufacturers, disaster preparedness software system more professional there are also disaster preparedness software system. Two places: Same city, offsite. Three centers: Production center, the same city disaster Tolerance Center, Remote Disaster Recovery Center.

What is a dual live data center