US 2014/0181042 A1 · INFORMATION PROCESSOR, DISTRIBUTED DATABASE SYSTEM, AND BACKUP METHOD

Abstract

According to one embodiment, a apparatus includes a first module which stores update information includes position information indicating an update position in the data file in a first storage and data to be updated in a second storage, such that update information items includes the update information are stored in contiguous storage areas of the second storage in the order of request of each of the update information items when the data file is requested to be updated, and a second module which stores the update information items stored in the second storage in free space having contiguous addresses of a third storage, in the order of storing in the second storage, if an amount of the update information items in the second storage exceeds a set volume.

Claims15

Dependent claims

An information processing apparatus comprising:

a first storage device configured to store a data file;
a second storage device;
a first storing module configured to store update information item comprising position information indicating an update position in the data file and data to be updated in the second storage device, such that update information items are stored in contiguous storage areas of the second storage device in the order of request of each of the update information items when the data file is requested to be updated;
a third storage device;
and
a second storing module configured to store the update information items stored in the second storage device in free space having contiguous addresses of the third storage device, in the order of storing in the second storage device, if an amount of the update information items in the second storage device exceeds a set volume.

3 more elements

A distributed database system connected to a network and comprising information processing apparatuses for structuring a distributed database, each of the information processing apparatuses comprising:

a first storage device configured to store a distributed database file which is a part of a database file divided as partitions;
a second storage device;
a first storing module configured to store update information item comprising position information indicating an update position in the distributed database file and data to be updated in the second storage device, such that update information items are stored in contiguous storage areas of the second storage device in the order of request of each of the update information items when the distributed database file is requested to be updated;
a third storage device;
and
a second storing module configured to store the update information stored in the second storage device in free space having contiguous addresses of the third storage device, in the order of storing in the second storage device, if an amount of the first update information items in the second storage device exceeds a set volume.

3 more elements

A backup method in a distributed database system connected to a network and comprising a plurality of information processors for structuring a distributed database, the backup method executed by each of the plurality of information processors comprising a first storage device configured to store a distributed database file, which is a part of a database file divided as partitions, the method comprising:

storing update information item comprising position information indicating an update position in the data file and data to be updated in a second storage device, such that update information items are stored in contiguous storage areas of the second storage device in the order of request of each of the update information items when the data file is requested to be updated;
and
storing the update information items stored in the second storage device in free space having contiguous addresses of a third storage device, in the order of storing in the second storage device, if an amount of the update information items stored in the second storage device exceeds a set volume.

Dependencies are inferred from the claim text.

Information processor, distributed database system, and backup method

Life of this patent

Information processor, distributed database system, and backup method

Life of this patent

Abstract

Claims15