Metadata server and disk volume selecting method thereof
AssigneeElectronics and Telecommunications Research Institute
InventorsSang Min LEE, Young Kyun KIM, Han NAMGOONG
Life of this patent
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Abstract
A metadata server in an asymmetric cluster file system detects the used capacity and the free capacity of a disk volume in a data server to allocate chucks. The method for selecting a disk volume includes receiving status information from a data server periodically and adjusting the standby command number of a disk volume in the disk server on the basis of the status information, and selecting a disk volume for chunk allocation on the basis of the standby command number in response to a chunk allocation request from a client.
Claims18
A method for selecting a disk volume by a metadata server in an asymmetric cluster file system, comprising:
- receiving status information from a data server periodically and adjusting a standby command number of a disk volume in the data server on the basis of the status information;
- and
- selecting a disk volume for chunk allocation on the basis of the standby command number in response to a chunk allocation request from a client.
A method for selecting a disk volume by a metadata server in an asymmetric cluster file system, comprising:
- receiving status information from a data server periodically, calculating a variation in used capacity of a disk volume in the data server, converting the variation to the chunk number, and subtracting the chunk number from a standby command number for the disk volume;
- and
- receiving a chunk allocation request from a client, selecting a disk volume for chunk allocation among the disk volumes with the standby command number smaller than or equal to a predetermined number, and increasing the standby command number of the selected disk volume.
A metadata server of an asymmetric cluster file system, comprising:
- a data transceiver unit receiving status information from a data server periodically;
- a data storage unit storing/managing the received status information;
- a controller unit adjusting a standby command number for a disk volume on the basis of the status information;
- and
- a disk volume selector unit selecting a disk volume for chunk allocation on the basis of the standby command number.
Dependencies are inferred from the claim text.