Metadata distribution algorithm based on directory hash in mass storage system

Wei Wu; Dong-jian Luo; Can-hao Pei

doi:10.1117/12.822635

19 March 2009 Metadata distribution algorithm based on directory hash in mass storage system

Wei Wu, Dong-jian Luo, Can-hao Pei

Proceedings Volume 7125, Eighth International Symposium on Optical Storage and 2008 International Workshop on Information Data Storage; 71251Q (2009) https://doi.org/10.1117/12.822635
Event: Eighth International Symposium on Optical Storage and 2008 International Workshop on Information Data Storage, 2008, Wuhan, China

Abstract

The distribution of metadata is very important in mass storage system. Many storage systems use subtree partition or hash algorithm to distribute the metadata among metadata server cluster. Although the system access performance is improved, the scalability problem is remarkable in most of these algorithms. This paper proposes a new directory hash (DH) algorithm. It treats directory as hash key value, implements a concentrated storage of metadata, and take a dynamic load balance strategy. It improves the efficiency of metadata distribution and access in mass storage system by hashing to directory and placing metadata together with directory granularity. DH algorithm has solved the scalable problems existing in file hash algorithm such as changing directory name or permission, adding or removing MDS from the cluster, and so on. DH algorithm reduces the additional request amount and the scale of each data migration in scalable operations. It enhances the scalability of mass storage system remarkably.

Citation Download Citation

Wei Wu, Dong-jian Luo, and Can-hao Pei "Metadata distribution algorithm based on directory hash in mass storage system", Proc. SPIE 7125, Eighth International Symposium on Optical Storage and 2008 International Workshop on Information Data Storage, 71251Q (19 March 2009); https://doi.org/10.1117/12.822635

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