US 9,805,109 B2Granted

Computer, control device for computer system, and recording medium

AssigneeHitachi, Ltd.

InventorYosuke Wada

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Abstract

A computer, which is communicably connected to a plurality of computers having respective storage areas for storing data and in which second data that is replication of first data arranged in a storage area of own computer is arranged in storage areas of other computers, and the computer holds capacities of the storage areas of the respective computers and determines first data ranges for arranging the first data in the storage areas of the own computer and the plurality of other computers in accordance with the capacities, determines a second data range that is a largest data range or has a largest capacity, with, as a starting point, a data range that is different from a largest data range or a data range having a largest capacity in the first data ranges, and arranges the data in the storage areas of the respective computers.

Claims7

Dependent claims

A control apparatus for a computer system, in which a plurality of computers having respective storage areas for storing data are communicably connected and in which the storage areas in which first data is arranged and the storage areas in which second data which is replicated data of the first data is arranged are included in different computers, the control apparatus comprising:

a memory configured to hold capacities of the storage areas of the plurality of computers;
a processor configured to determine first data ranges for arranging pieces of the first data in the storage areas of the plurality of computers in accordance with respective capacities of the plurality of computers;
the processor configured to determine second data ranges for arranging the second data in the storage areas of the plurality of computers by determining a data range of the second data, the data range being a largest data range or having a largest capacity in the first data ranges;
the processor configured to arrange the data in the storage areas of the respective computers in accordance with the first data ranges and the second data ranges;
the processor configured to calculate a total data size of the data held by all the computers on the basis of a data size for each piece of the data and the number of the pieces of the data;
the processor configured to calculate data densities of the respective computers on the basis of the capacities of the respective computers and the first data ranges;
the processor configured to generate data blocks by combining a plurality of pieces of the data by determining a data size for each data block on the basis of the total data size and the data densities and generating the data blocks having a same data size on the basis of the total data size and the number of the data blocks;
the processor configured to allot the data blocks to the computers in accordance with the capacities of the storage areas of the respective computers;
and
the processor configured to determine a largest data size on the basis of the number of the allotted data blocks.

7 more elements

A non-transitory computer-readable recording medium storing a program for causing a control apparatus for a computer system in which a plurality of computers having respective storage areas for storing data are communicably connected and in which the storage areas in which first data is arranged and the storage areas in which second data which is replicated data of the first data is arranged are included in different computers, to execute

a step of holding capacities of the storage areas of the respective computers and determining first data ranges for arranging pieces of the first data in the storage areas of the plurality of computers in accordance with respective capacities of the plurality of computers,
a step of determining second data ranges for arranging the second data in the storage areas of the plurality of computers by determining a data range of the second data, the data range being a largest data range or having a largest capacity, with, as a starting point, a data range that is different from a largest data range or a data range having a largest capacity in the first data ranges,
a step of arranging the data in the storage areas of the respective computers in accordance with the first data ranges and the second data ranges,
a step of calculating a total data size of the data held by all the computers on the basis of a data size for each piece of the data and the number of the pieces of the data;
a step of calculating data densities of the respective computers on the basis of the capacities of the respective computers and the first data ranges;
a step of generating data blocks by combining a plurality of pieces of the data including determining a data size for each data block on the basis of the total data size and the data densities and generating the data blocks having a same data size on the basis of the total data size and the number of the data blocks;
a step of allotting the data blocks to the computers in accordance with the capacities of the storage areas of the respective computers;
and
a step of determining a largest data size on the basis of the number of the allotted data blocks.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/424,375Filed 28 Dec 2012
Published: US 2015/0220612 A16 Aug 2015
Granted: 31 Oct 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

G06F 16/278
Replication, distribution or synchronisation of data between databases or within a distributed database system; Distributed database system…: data…
G06F 11/2094
Where persistent mass storage functionality or persistent mass storage control functionality is redundant: redundant storage or storage space
G06F 16/182
File system types: distributed file systems
G06F
Computing and data processing