efdsCOCA¹⁹³⁰²⁸ 基本例句 abbr.无差错分秒;无误码分秒;十分之一无误码秒error-free decisecond The testing that is described demonstrated that EFDs provide a substantial improvement approximately9X in I/ O performance when used in an OLTP database environment. 所讨论的这个测试说明了 EFD用在一个 OLTP数据库环境时能大大提高 I/ O性能约为9 倍。 ibm