Concurrent maintenance support allows fixes to be applied without taking the systems down.
并发维护支持允许我们在保持系统在线的情况下应用修复补丁。
With midrange and high end POWER7 systems, concurrent maintenance support enables continuous application availability.
在中高端POWER 7系统中，并发维护支持使持续应用程序可用性成为可能。
Meanwhile, data update and schema change are possible to coexist under the concurrent environment which brings about many problems to view maintenance.
在并发环境下，数据更新和模式更新极有可能同时存在，这对视图维护工作带来极大的困难。
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