DIRECTED PLACEMENT OF DATA IN A REDUNDANT DATA STORAGE SYSTEM

• US 20120191710A1
• Filed: 01/24/2012
• Published: 07/26/2012
• Est. Priority Date: 04/09/2008
• Status: Active Grant

• Current Assignee: Alexander Mitaru, Charles Morris, Don Harschadath Wanigasekara-Mohotti, John Howe
• Original Assignee: Alexander Mitaru, Charles Morris, Don Harschadath Wanigasekara-Mohotti, John Howe
• Inventors: HOWE, John, MITARU, Alexander, MORRIS, Charles, WANIGASEKARA-MOHOTTI, Don Harschadath
• Granted Patent: US 8,504,571 B2
• Time in Patent Office: Days
• US Class Current: 707/737
• CPC Class Codes: G06F 11/2094 Redundant storage or storage space G06F11/2056 takes precedence
• CPC Class Codes: G06F 16/184 implemented as replicated file system

Abstract

A data processing apparatus, comprising a metadata store storing information about files that are stored in a distributed data storage system, and comprising a class database; one or more processing units; logic configured for receiving and storing in the class database a definition of a class of data storage servers comprising one or more subclasses each comprising one or more server selection criteria; associating the class with one or more directories of the data storage system; in response to a data client storing a data file in a directory, binding the class to the data file, determining and storing a set of identifiers of one or more data storage servers in the system that match the server selection criteria, and providing the set of identifiers to the data client.

Claims

1. A data processing apparatus, comprising:

a metadata store storing information about files that are stored in a distributed data storage system, and comprising a class database;

one or more processing units;

logic coupled to the processing unit(s) and to the metadata store and comprising stored sequences of instructions which, when executed by the processing unit(s), cause;

receiving and storing in the class database a definition of a class of data storage servers comprising one or more server selection criteria and one or more representation counts;

associating the class with one or more directories of the data storage system;

in response to a data client storing a data file in a directory of the one or more directories, determining a set of data storage servers that match the server selection criteria and storing a plurality of replicas in the data storage servers according to the representation count.

2. A computer-readable data storage medium comprising stored sequences of instructions which, when executed by one or more processing unit(s), cause:

receiving and storing in the class database a definition of a class of data storage servers comprising one or more server selection criteria and one or more representation counts;

associating the class with one or more directories of the data storage system;

in response to a data client storing a data file in a directory of the one or more directories, determining a set of data storage servers that match the server selection criteria and storing a plurality of replicas in the data storage servers according to the representation count.

3. A computer-implemented method, comprising:

receiving and storing in the class database a definition of a class of data storage servers comprising one or more server selection criteria and one or more representation counts;

associating the class with one or more directories of the data storage system;

in response to a data client storing a data file in a directory of the one or more directories, determining a set of data storage servers that match the server selection criteria and storing a plurality of replicas in the data storage servers according to the representation count.