US 6,557,088 B2 · Information processing system and recording medium recording a program to cause a computer to execute steps

Abstract

An information processing system which has a disk buffer for temporarily storing data items read from a disk unit, a block processing order determination module for detecting, from a processing request for requesting data items stored on the disk unit, a data item matching the data stored in the disk buffer from the data items requested in the processing request and determining the read order of the data item matching and the remaining data requested in the processing request so that the data item matching is read before the remaining data, and a read module for reading the data item matching from the disk buffer before reading the remaining data into the disk buffer from the disk unit in accordance with the read order determined by the block processing order determination module.

Claims7

Dependent claims

An information processing system comprising:

priority determination means for accepting a first processing request for requesting data and a second processing request for requesting a smaller quantity of data than in the first processing request and assigning a priority to the second processing request higher than the priority of the first processing request involving a larger data quantity based on the data quantities requested in the first and second processing requests;
and
read means for reading the data in the processing request assigned the higher priority from a storage unit, in precedence over data in any other processing request.

A recording medium recording a program for causing a computer to execute:

a first acceptance step accepting a first processing request for requesting data;
a first read step reading data related to the first processing request into buffer storage means from a disk unit;
a second acceptance step accepting a second processing request for requesting data during execution of said first read step;
a comparison step executed after said second acceptance step, comparing a first data quantity involved in the first processing request with a second data quantity involved in the second processing request;
a second read step interrupting said first read step, reading data related to the second processing request from the disk unit, and transmitting the read data to a requesting party making the second processing request if the second data quantity is smaller than the first data quantity;
and
a third read step executed after termination of said second read step, restarting execution of said first read step that was interrupted.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

10/196,184Filed 17 Jul 2002 · division

Priority

JP 11-08762730 Mar 1999

Published

US 2002/0174294 A121 Nov 2002

Granted

29 Apr 2003

Term ends

Not estimatedThe source records don’t support an estimate.

Classification7 codes

G06F 3/0607
Improving or facilitating administration, e.g. storage management: by facilitating the process of upgrading existing storage systems, e.g. for…
G06F 3/0613
Improving I/O performance: in relation to throughput
G06F 3/064
Organizing or formatting or addressing of data: management of blocks
G06F 3/0656
Vertical data movement, i.e. input-output transfer; data movement between one or more hosts and one or more storage devices: data buffering…

Information processing system and recording medium recording a program to cause a computer to execute steps

Life of this patent

Information processing system and recording medium recording a program to cause a computer to execute steps

Life of this patent

Abstract

Claims7