基于网格存储系统的自适应数据分配策略

Method of self-adaptability data assignment on grid storage system

在网格存储系统中通常包含各种异构的存储设备节点。基于同构系统的传统数据分配和放置策略并不能针对网格存储系统中异构存储设备的性能差异来进行数据分配,降低了网格存储系统的性能。提出一种自适应的数据分配策略(AD)。通过运用基于虚拟磁盘性能的自适应分配策略和自适应的数据副本创建策略,AD能够根据存储设备节点的性能差异有效的进行数据分配。实验证明,自适应的数据分配策略能够充分发挥异构存储设备的性能,有效解决网格存储系统的数据放置不平衡问题,提高网格存储系统的利用率。

There are usually many heterogeneous storage nodes in the grid storage system. Methods of data assignment on homogeneous storage system do not adapt to heterogeneous system any more. A new self-adaptability method （AD） of data assignment on grid storage system is proposed. It can obtain the optimal data assignment and efficiently utilize both the I/O bandwidth and storage capacity of all storage nodes. Experimental results show that this method can fully utilize the heterogeneous storage nodes＇ performance, resolve the imbalance problem of data placement of grid storage system and increase the utility ratio of the grid storage system effectively.