Method and program for creating determinate backup data in a database backup system
AssigneeHitachi, Ltd.
InventorsSatoru Watanabe, Shinji Fujiwara, Yoshio Suzuki
Life of this patent
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Abstract
The invention provides an application technique of a backup data in which a backup data can be utilized by creating a backup data including no indeterminate data in a backup system. In a backup system including a primary system and a backup system, the method of creating the backup data includes: a data update record rerun step for rerunning a data update record to a backup data; and a backup data creation step for starting a read to a backup data B, stopping a read to a backup data A, copying the backup data to the backup data A, starting the read to the backup data A, stopping the read to the backup data B, and copying the backup data A to the backup data B.
Claims18
A method for creating a backup data by using a first backup data and a second backup data in a backup system which receives a data update record of a database to back up said database, comprising:
- a data update record rerun step for rerunning a data update to said first backup data;
- and
- a backup data creation step for stopping a read to said second backup data, copying said first backup data to said second backup data and starting the read to the second backup data.
A method for creating a backup data by using first, second and third backup data in a backup system which receives a data update record of a database to back up said database, comprising:
- a data update record rerun step for rerunning a data update to said first backup data;
- and
- a backup data creation step for starting a read to said third backup data, stopping a read to said second backup data, copying said first backup data to said second backup data, starting the read to said second backup data, stopping the read to said third backup data and copying said second backup data to said third backup data.
A method for creating a backup data in a backup system which receives a data update record of a database to back up said database, comprising:
- a data update record rerun step for rerunning a data update to said backup data;
- a backup data read step for reading said backup data;
- and
- a determination step for determining whether said data update record rerun step or said data read step is executed.
A program for creating a backup data by using a first backup data and a second backup data in a backup system which receives a data update record of a database to back up said database,
- wherein said program executes:
- a data update record rerun step for rerunning a data update to said first backup data;
- and
- a backup data creation step for stopping a read to said second backup data, copying said first backup data to said second backup data and starting the read to the second backup data.
A program for creating a backup data by using first, second and third backup data in a backup system which receives a data update record of a database to back up said database,
- wherein said program executes:
- a data update record rerun step for rerunning a data update to said first backup data;
- and
- a backup data creation step for starting a read to said third backup data, stopping a read to said second backup data, copying said first backup data to said second backup data, starting the read to said second backup data, stopping the read to said third backup data and copying said second backup data to said third backup data.
A program for creating a backup data in a backup system which receives a data update record of a database to back up said database,
- wherein said program executes:
- a data update record rerun step for rerunning a data update to said backup data;
- a backup data read step for reading said backup data;
- and
- a determination step for determining whether said data update record rerun step or said data read step is executed.
Dependencies are inferred from the claim text.