BOSS内存数据库高可用性研究和应用

现有的MDB程序高可用机制主要采用内存数据镜像文件和Redo(重做)日志恢复的方式进行异常情况的恢复处理，此方式存在处理耗时长和可能导致部分数据丢失的问题，无法满足电信级业务运营的要求。通过基于网络的MDB主备双机高可用解决方案，在现有系统基础上增加MDB监视进程和MDB守护进程，可实现MDB双机的交易事务的实时同步处理和异常情况下的主备切换。实际测试和应用证明，MDB双机高可用方案可实现在主用MDB异常情况下无缝切换到备用MDB，且数据完整无丢失，主备MDB交互对业务处理效率无明显影响，在提高MDB高可用和业务连续性上取得了较好的效果。

Research and application of memory database high availability on business operating support system

MDB high availability is realized by adopting MDB mirror data and redo log to recover. It is time-consuming and possibly losing some data. Therefore, it can’t meet the needs of telecommunication service. Based on current processing procedure in the BOSS, it adds MDB monitor and MDB daemon. And it is implemented by MDB active standby two-machine high availability based on network to process transaction synchronously in real time and switch in abnormity. The data of measure and application shows that it is switched seamlessly to standby MDB when the active MDB is abnormal. It ensures data integrity without drop out and process efficiency without obvious decrease. And it is effective in MDB high availability and service continuity.