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Fine grit document and catalogs version management method based on snapshot

InactiveCN101162469AShort execution timeFlexible configuration version generation strategySpecial data processing applicationsGranularityUsability
The present invention relates to a fine-granularity files and directory edition management method based on snapshots, belonging to the multi-version document system field. The present invention separates a name space consisting of files and dirnames in a whole file system from an edition space representing the generating periods of different editions, and adopts relatively independent strategies to execute management, forming a hierarchical two-dimensional structure, i.e. forming a hierarchical structure from a root directory to a file in the name space; in the edition space, the editions of files and directory are organized through an index structure chronologically, forming a hierarchical structure in the edition space. The retrieval of the name space adopts an index strategy based on dynamic hash. The retrieval of the edition space adopts an index strategy based on a red-black tree. The directory edition and file edition respectively adopt a red-black tree structure variant aiming at the respective characteristics. The present invention can greatly improve the usability and the performance of the system, and controls the amount of consumption of time and space resulting from the maintenance of historical editions in an acceptable scope.
Owner:TSINGHUA UNIV

Data management system and method based on composite blockchain network

The invention relates to a data management system and method based on a composite blockchain network, wherein the system comprises a first-level blockchain network and at least one second-level blockchain network; the second-level blockchain network comprises multiple mutually connected slave node servers; the second-level blockchain network sets a master node server in all the slave node servers; and the master node servers in all the second-level blockchain networks are mutually connected, so that the first-level blockchain network is formed. By means of the data management system and method disclosed by the invention, the integrity, the authenticity and the standardization of data can be ensured through audit signature verification of the composite multi-level blockchain network; the security of the data is ensured in a hierarchical encryption and multiple authorization mode; structural design of hierarchical storage of detailed data and classified index data is carried out through a blockchain technology and the composite multi-level network; therefore, the data is relatively smooth to interconnect, intercommunicate and exchange; furthermore, audit tracing can be realized; and the data retrieving, applying and sharing efficiency can be increased.
Owner:黑龙江卓亚科技有限公司
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