Two-Machine hot-standby (or high-availability) is based on the high-availability system, the two servers in the hot spare (or highly available), because both high-availability in the domestic use more, so the name of the dual-machine heat preparation, Dual-machine high-availability by work switching mode is divided into: master-Standby mode (Active-standby mode) and dual-host mode (active-active mode), primary-standby means that a server is in a certain kind of business activation state (that is, the active state), The other server is in the standby state of the business (that is, the standby state). The dual-host approach means that two different services are in the primary standby state (that is, the Active-standby and Standby-active states) on two servers respectively. Http://baike.baidu.com/link?url=Phsggq_ i-who1r-ckbctdiyefvydl8bizuqoclb5j68ysr38ordg29vfbxmo4krkt1tnn1ivxx2lsh2b-vc43k
Dual-Machine Hot standby
