As for the information processing of important information system in large data quantity, hard real-time and high-reliability, in order to minimize the switch-over duration and maintain the data integrity, research on the technology of time synchronism. Design the method of switch-in based on double-buffers, the method has high precision time synchronism based on the FTP standard. The result of performance testing shows that the switch-over duration is limited to tens millisecond level and the data is keep available without lost or duplication, which efficiently improve the reliability of important information system. The achievement of research can also be applied to other similar mission-critical systems.%论文针对重要信息系统信息处理数据量大、实时性强、可靠性高的特点,为确保双工切换时间短、数据完整的目标,重点研究服务器高精度时间同步技术,设计了基于PTP规范的双缓冲机制的切入高精度时间同步方法.试验表明,该设计达到双工切换时间在十毫秒量级和数据完整性的目标,有效提高了专业领域数据处理平台的可靠性.该研究成果可进一步推广应用到其它类似的关键任务系统中.
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