一种分布式存储系统用户磁盘配额的实现

用户磁盘配额可实现集群系统中分布式文件系统资源的管理和控制.在分布式文件系统中常使用多数据服务器来扩充文件系统的存储空间、提高并行数据IO的能力.结合NFS,Lustre中分布式配额实现方式,提出了一种适合对等存储模式下的用户磁盘配额策略.该策略使用静态设置和动态调整相结合的方式,能够很好地解决多数据服务器用户配额使用空间不均匀的问题;它可以运行在全局文件系统的所有客户端,避免了单客户端节点失效的问题,且对文件系统性能影响较小.

Implementation of User Disk Quota in Distributed Storage System

User disk quota is a useful tool for the management and control of resources in distributed file system. Multi-server model is a common pattern in distributed storage systems, which is able to provide high scalability and high performance of Parallel IO. We analyzed the implement of user disk quota in NFS and Lustre filesystem, and proposed a policy of user disk quota under symmetric-server model. This policy, which combines the static set and dynamic adjustment method, addressed the problem of uneven use of file system space under multi-server model. It runs at every client of distributed file system, avoids the problem of single node failure, and also has little side effect on the performance of the file system.