Chapter Three studies how to aggregate Grid node storage resources, including node organization mechanism, node join and leaving, storage resource scheduling and allocation, resource node searching, node unallocated storage space management, and storage resource allocation and reclaim. And the stochastic fluid model is adopted to analyze the performance of the whole Grid Storage system.
第三章研究如何汇聚网格节点的存储资源，包括存储节点的组织机制、节点的加入和离开、存储资源的调度与分配、资源节点的查找、节点未分配的存储空间管理、存储资源的分配与回收等问题：最后针对动态网格节点构成的网格存储系统，采用了随机流模型的方法分析了存储空间分配与网格节点数目的关系。
参考来源 - 基于网格的存储系统关键技术研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Vgreduce removes unallocated PVs from a volume group, reducing the vg.
vgreduce：从卷组中删除未分配的PV，这会减小vg。
Initially, all memory is red, which represents unallocated and uninitialized memory.
最初，所有的内存都是红色，这表示内存还没有被分配也没有初始化。
When that process is completed, the partition will be classified as an unallocated physical volume.
当该过程完成时，分区将分类为未分配的物理卷。
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