Metadata hierarchy management method and system of storage virtualization system

Abstract

The invention discloses a metadata layer management method of a storage virtualization system and a system thereof. The method manages the logical tree of metadata hierarchically, introduces a matching table to reduce the pressure on the root directory server, not only can quickly and accurately direct to the directory requested by the user, but also enables the system to achieve better scalability. The matching table is resident in memory, because it only records the root entry address of each directory server, so it occupies a very small space and is easy to manage. Since the match table does not have many entries, searching the match table to match the user request directory is also very efficient. The system includes a metadata server and a directory server provided with a matching table and a matching table management module; the matching table at least includes the name of the directory server and the root directory of the metadata sub-logic tree stored on the directory server. The invention has the characteristics of high efficiency, good expansibility, easy management and the like.

Description

Technical field [0001] The invention belongs to the field of computer storage, and specifically relates to a metadata hierarchy management method and system for a storage virtualization system. Background technique [0002] In modern high-performance computing, scientific computing and military applications have increasingly higher requirements for storage, including large-capacity, distributed, high-performance, and high-reliability. The virtual storage management method of the WAN integrates various geographically distributed high-performance storage systems into one, forming a huge distributed storage space, fully realizing resource sharing, improving resource utilization, and effectively solving the explosive growth of stored data and storage management capabilities The contradiction between relative deficiencies. [0003] In a wide-area storage system, these massive storage resources must be effectively managed to introduce the concept of metadata. Metadata is data describin...

AI Technical Summary

Problems solved by technology

When the metadata becomes huge, the system will enable multiple metadata servers at the same time, which will lead to the following problems: on the one hand, the logical tree must be distributed on these metadata servers, and on the other hand, the directory servers must be Collaborative operation, because the metadata to be returned may be distributed on different metadata servers, which puts pressure on the root directory server of metadata

Third, if the root directory server fails, the entire directory service system will no longer be able to function normally, and it is difficult to achieve high availability of the system

Finally, this structure makes it difficult to scale the metadata server

Images