Metadata server and metadata management method
AssigneeElectronics and Telecommunications Research Institute
InventorsMyung Hoon CHA, Hong Yeon KIM, Ki Sung JIN, Young Kyun KIM, Han NAMGOONG
Life of this patent
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Abstract
Provided are a metadata server cluster and a metadata management method thereof, which distribute metadata for a file to a cluster including a plurality of metadata servers to replicate the metadata. The metadata server includes a directory hierarchy storage unit, a metadata storage unit, and a search unit. The directory hierarchy storage unit stores all directory hierarchies which are stored in the metadata server cluster. The metadata storage unit stores metadata for a data file. The search unit searches the directory hierarchies and the metadata.
Claims20
A metadata server in a metadata server cluster including a plurality of metadata servers sharing a directory hierarchy, the metadata server comprising:
- a directory hierarchy storage unit storing all directory hierarchies which are stored in the metadata server cluster;
- a metadata storage unit storing metadata for a data file;
- and
- a search unit searching the directory hierarchies and the metadata.
A metadata management method in a metadata server cluster including a plurality of metadata servers, the metadata management method comprising:
- checking a metadata server storing metadata for a data file on which a client requests an inquiry;
- providing information of the checked metadata server to the client;
- searching, by the checked metadata server, the metadata for the requested data file in response to the inquiry request of the client;
- and
- providing the searched metadata to the client.
A metadata management method in a metadata server cluster including a plurality of metadata servers, the metadata management method comprising:
- receiving a making request of a directory;
- selecting a metadata sever to make the directory;
- making a directory in a metadata storage unit of the selected metadata server;
- and
- reflecting the directory making to update a directory hierarchy.
A metadata management method in a metadata server cluster including a plurality of metadata servers, the metadata management method comprising:
- receiving a metadata file generation request from a client;
- checking a metadata server with a directory to which the data file will belong;
- notifying the client of information on the checked metadata server;
- and
- receiving, by the checked metadata server, the metadata file generation request from the client, and generating a metadata file in the metadata server in response to the generation request.
Dependencies are inferred from the claim text.