arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2006.09188astro-ph.IM
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天文观测数据长期归档的再分发工具

A Redistribution Tool for Long-Term Archive of Astronomical Observation Data

Chao Sun, Ce Yu, Chenzhou Cui, Boliang He, Jian Xiao, Zhen Li, Shanjiang Tang, Jizhou Sun

摘要:

天文观测数据需要长期保存,观测数据的快速积累使得需要考虑长期档案保管的成本。除了基于低速磁盘的在线存储之外,还可以使用基于光盘或磁带的离线存储来节省成本。然而,对于需要历史数据的天文学研究(特别是时域天文学),数据访问技术的性能和能耗会导致问题,因为所请求的数据(根据观测时间组织)可能位于多个存储设备上。在这项研究中,我们设计和开发了一个工具,称为AstroLayout重新分布的观测数据使用空间聚合。核心算法根据原始观测数据统计量和目标存储系统,采用图划分的方法生成优化的数据布局。对于给定的观测数据,AstroLayout可以根据此放置将长期存档复制到目标存储系统中。效率评估表明,AstroLayout可以减少响应时域天文学研究中的数据访问请求时激活的设备数量。除了提高数据访问技术的性能外,AstroLayout还可以降低存储系统的功耗。为了增强适应性,它支持任何介质的存储系统,包括光盘、磁带和硬盘。

英文摘要:

Astronomical observation data require long-term preservation, and the rapid accumulation of observation data makes it necessary to consider the cost of long-term archive storage. In addition to low-speed disk-based online storage, optical disk or tape-based offline storage can be used to save costs. However, for astronomical research that requires historical data (particularly time-domain astronomy), the performance and energy consumption of data-accessing techniques cause problems because the requested data (which are organized according to observation time) may be located across multiple storage devices. In this study, we design and develop a tool referred to as AstroLayout to redistribute the observation data using spatial aggregation. The core algorithm uses graph partitioning to generate an optimized data placement according to the original observation data statistics and the target storage system. For the given observation data, AstroLayout can copy the long-term archive in the target storage system in accordance with this placement. An efficiency evaluation shows that AstroLayout can reduce the number of devices activated when responding to data-access requests in time-domain astronomy research. In addition to improving the performance of data-accessing techniques, AstroLayout can also reduce the storage systems power consumption. For enhanced adaptability, it supports storage systems of any media, including optical disks, tapes, and hard disks.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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