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平方千米阵列(Square Kilometre Array, SKA)望远镜建成后将具有超高的灵敏度、超快的巡天速度以及宽视场,进而产生超海量的观测数据。SKA天文台与各国区域数据中心间的海量数据同步传输是当前SKA建设中的一个难点。SKA先导项目使用的下一代归档存储系统(Next Generation Archive System, NGAS)在应用测试中存在效率低下,性能不足等问题。提出了一种基于ZeroMQ的数据存储与同步方法,通过采用更加高效的异步消息机制实现同步传输数据,回避了NGAS原有的采用HTTP协议的局限。实验结果表明,新方法在平均数据归档存储效率方面比原有方法快了近40倍,能够基本满足10 GB带宽的全速传输需要,取得了较好的使用效果。 

The Square Kilometre Array (SKA) will have ultra-high sensitivity, ultra-fast survey speed and wide field of view, resulting in super-massive raw observation data. Massive data synchronization/delivery between the SKA observatories and regional data centers in various countries is a difficult problem in the current SKA construction. The Next Generation Archive System (NGAS) used by SKA precursor is inefficient and has insufficient performance in the application measurement. In this paper, we proposed a ZeroMQ-based data storage and synchronization method. By adopting more efficient asynchronous messaging mechanism to realize synchronous data delivery, it can avoid the limitations of the HTTP protocol adopted by the NGAS.Experimental results show that the new method is nearly 40 times faster than the original method used by NGAS in terms of average data archival/storage efficiency, which can basically meet the requirements of the full-speed transmission of 10GB bandwidth and has achieved a better use effect.