CAJ | 학술논문

针对传统云存储平台的敏感数据的安全问题，将元数据管理分成客户端元数据管理与云端元数据管理两部分，元数据子服务器自主提取、维护、读写和存储敏感信息的元数据，在映射关系方面采用基于文件与数据块之间冗余随机映射算法提高文件存储的安全性，同时采用按需询问同步策略保障元数据子服务器与云端元数据服务器之间的数据块到数据存储中心映射关系的一致性，确保整个存储系统的稳定性与可靠性。在多用户并发访问下，对不同规模数据集的读、写性能的实验测试表明，该存储系统在自主管理敏感信息元数据的前提下，与HDFS、GFS相比仍具有较好读写性能和稳定的数据持久化能力。
침대전통운존저평태적민감수거적안전문제，장원수거관리분성객호단원수거관리여운단원수거관리량부분，원수거자복무기자주제취、유호、독사화존저민감신식적원수거，재영사관계방면채용기우문건여수거괴지간용여수궤영사산법제고문건존저적안전성，동시채용안수순문동보책략보장원수거자복무기여운단원수거복무기지간적수거괴도수거존저중심영사관계적일치성，학보정개존저계통적은정성여가고성。재다용호병발방문하，대불동규모수거집적독、사성능적실험측시표명，해존저계통재자주관리민감신식원수거적전제하，여HDFS、GFS상비잉구유교호독사성능화은정적수거지구화능력。
Considering the sensitive information security issue on the traditional cloud storage platform, It divided metadata management into two parts , the client side metadata management-Sub-Metadata Server ( Sub-MS) and the cloud side metadata management-Core Metadata Server( CMS) .Sub-MS aimed to ex-tract independently ,maintain,read and write and store the metadata with sensitive information, which used the random redundancy algorithm in maintaining mapping relations, based on the redundancy be-tween files and data blocks, to improve the files storage security.At the same time, Sub-MS used the re-quest synchronism strategy to keep the consistency of mapping relations from data blocks to Data Server ( DS) between Sub-MS and CMS, to insure the stability and reliability of the whole storage system.With multi-user concurrent access, the experiment about performance of reading and writing for the data sets of different sizes indicates that compared with HDFS and GFS, SISM still has good reading and writing per-formance and data persistence capabilities in managing metadata of sensitive information by itself.