Method and system for data processing with data backup

• US 20060248125A1
• Filed: 06/29/2006
• Published: 11/02/2006
• Est. Priority Date: 04/22/2004
• Status: Active Grant

• Current Assignee: Nobuo Kawamura
• Original Assignee: Nobuo Kawamura
• Inventors: Kawamura, Nobuo
• Granted Patent: US 7,302,454 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 11/1451 by selection of backup contents
• CPC Class Codes: G06F 11/1461 Backup scheduling policy
• CPC Class Codes: Y10S 707/99955 Archiving or backup

Abstract

The invention relates to backup processing for performing backup of data used in an information processing device having a storage unit. When data has been updated, updated bit information indicating that the data has been updated is stored in an update bitmap management table stored in the storage unit. When the number of updated bit information in the update bitmap management table has reached a differential backup reference value for estimating differential backup time, the backup of data corresponding to the updated information is commanded. When the command for the backup is received, the updated bit information stored in the update bitmap management table in the storage unit is read out. Then, the backup of the data corresponding to the updated bit information is obtained.

Claims

1. A database processing method for performing backup of data used in an information processing device having a storage means, the method comprising the steps of:

storing in an update bitmap management table stored in the storage means updated bit information indicating that data has been updated, when the data has been updated;

commanding the backup of data corresponding to updated bit information stored in the update bitmap management table when a number of the updated bit information stored in the update bitmap management table has reached a differential backup reference value for estimating differential backup processing time;

reading out the updated bit information stored in the update bitmap management table in the storage means upon receipt of the command for the backup, and obtaining the backup of the data corresponding to the update bit information stored in the update bitmap management table;

estimating processing time required for the backup processing from a size of the data corresponding to the updated bit information; and

estimating processing time required for a recovery processing from the size of data corresponding to the updated bit information.

2. A backup processing system for performing backup of data used in an information processing device having a storage means, the system comprising:

a bitmap processing unit for storing in an update bitmap management table stored in the storage means updated bit information indicating that data has been updated, when the data has been updated, and commanding the backup of data corresponding to updated bit information stored in the update bitmap management table when a number of the updated bit information stored in the update bitmap management table has reached a differential backup reference value for estimating differential backup processing time;

a backup processing unit for reading out the updated bit information stored in the update bitmap management table in the storage means upon receipt of the command for the backup, and obtaining the backup of the data corresponding to the update bit information stored in the update bitmap management table; and

an estimating processing unit for estimating processing time required for the backup processing from a size of the data corresponding to the updated bit information, and estimating processing time required for a recovery processing from the size of data corresponding to the updated bit information.