面向海量空间数据存储的元数据管理机制

Metadata management mechanism of massive spatial data storage

为了有效管理海量空间数据存储的元数据,引入了一种基于一致性哈希的分布式元数据服务器管理架构,并在此基础上提出了一种元数据轮式备份策略,将经过一致性哈希算法散列后存储元数据的节点按轮转方式进行数据备份,有效缓解了元数据管理的单点问题与访问瓶颈。最后对轮式备份策略进行测试,得出最佳元数据节点个数备份方案,与单点元数据服务器相比提高了元数据的安全性,降低了访问延迟,并结合虚拟节点改善了分布式元数据服务器的负载均衡。

In order to manage the metadata of massive spatial data storage effectively, a distributed metadata server management structure based on consistent hashing was introduced, and on this basis, a metadata wheeled backup strategy was proposed in this paper, which stored Hash metadata node after excuting a consistent Hash algorithm according to the method of data backup, and it effectively alleviated the single point of metadata management and access bottleneck problems. Finally testing wheel backup strategy, it obtained the optimum number of metadata node backup solution. Compared with the single point of metadata servers, the proposed strategy improves the metadata safety, reduces the access delay, and improves the load balance of distributed metadata server combined with virtual nodes.