File Distribution System in Which Partial Files Are Arranged According to Various Allocation Rules Associated with a Plurality of File Types

• US 20080098086A1
• Filed: 12/06/2007
• Published: 04/24/2008
• Est. Priority Date: 03/17/2003
• Status: Active Grant

• Current Assignee: Google LLC (Alphabet Inc.)
• Original Assignee: Hitachi, Ltd.
• Inventors: Sonoda, Koji, HARA, Junichi, Iwasaki, Masaaki
• Granted Patent: US 7,620,698 B2
• Time in Patent Office: Days
• US Class Current: 709/217
• CPC Class Codes: G06F 16/122 using management policies backup systems G06F11/1446; file migration policies for HSM systems G06F16/185
• CPC Class Codes: G06F 16/182 Distributed file systems

Abstract

In a distributed file system, when a user requests a computer to create a distributed file, a management computer acquires a list of computers complying with an allocation rule selected by the user from allocation rules taking the performance, security level, reliability level and utility rate into consideration. When the user requests the computer to access the distributed file, on the other hand, the partial files and the server information are collected from each computer. Each computer evaluates the allocation of the partial files based on the selected allocation rule and the server information from each computer, and if required, selects a destination computer and instructs the partial files to be moved to the destination computer.

Claims

1. A computer system comprising at least one first computer, a second computer and a third computer,

wherein said third computer has information concerning said first computer, and said second computer has information as an allocation rule including a plurality of evaluation items for defining file distribution;

wherein said second computer, upon receipt of an instruction to create a distributed file, transmits said allocation rule to said third computer;

wherein said third computer, upon receipt of said allocation rule, specifies said first computer complying with said allocation rule by reference to the information concerning said first computer, and transmits said information concerning said specified first computer to said second computer; and

wherein said second computer transmits partial files of the distributed file instructed for creation, to said first computer based on the received information of said first computer.