基于数据块级迁移策略的设计与实现

摘要

To optimize the performance of data migration strategy in hierarchical storage system,and further improve the per-formance of the storage system,the data valuation model based on chunk was studied.The chunk-level data characteristics were taken into consideration and the chunk size,write read frequency,the association between chunks,and historical value coefficient were quantized.A dual threshold migration strategy based on active migration threshold and passive threshold was proposed. According to the experimental results,the valuation model is feasible and the algorithm is practical.%为优化分层存储系统中数据迁移策略性能，进一步提高整个存储系统的存储性能，提出一个基于数据块级别的价值评价模型。综合考虑块级数据特点，分别量化块级数据大小、读写频次、数据块间关联度、历史价值系数得出数据块价值；在此模型的基础上，提出基于主动迁移阈值和被动迁移阈值的双阈值迁移策略。通过实验验证了评价模型的可行性和算法的有效性。