Computing system and a method for calculating a recovery time of an application system

• US 20060173870A1
• Filed: 12/01/2005
• Published: 08/03/2006
• Est. Priority Date: 12/29/2004
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Erdmenger, Joerg, Oldengott, Hans-Ulrich
• Granted Patent: US 7,657,583 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 11/1461 Backup scheduling policy
• CPC Class Codes: G06F 11/1469 Backup restoration techniques
• CPC Class Codes: G06F 11/1471 involving logging of persistent data for recovery

Abstract

The invention relates to a method for calculating a recovery time (t_r) of an application system (DB) in a computer system for tuning the computer system dynamically, wherein the recovery time (t_r) is calculated and controlled within flexible predefined time slices and compared to a predefined time period (t₀) and a trigger is set in case that the calculated recovery time (t_r) exceeds the predefined time period (t₀).

Claims

1. A method for calculating a recovery time (t_r) of an application system (DB) in a computer system for tuning the computer system dynamically, wherein the recovery time (t_r) is calculated and controlled within flexible predefined time slices and compared to a predefined time period (t₀) and a trigger is set in case that the calculated recovery time (t_r) exceeds the predefined time period (t₀).

2. The method according to claim 1, wherein the calculated recovery time (t_r) is isochronously displayed for review.

3. The method according to claim 1, wherein, the trigger initiates a warning signal for a user.

4. The method according to claim 1, wherein the trigger initiates a warning signal combined with an activation of additional appropriate system resources for reducing the recovery time (t_r).

5. The method according to claim 1, wherein the trigger enables simulator options on a corresponding client for modulating systematically backup performance parameters.

6. The method according to claim 1, wherein an execution plan for a backup is generated on the basis of the calculation of the recovery time (t_r), the execution plan comprising a schedule of the execution of the backup and the backup being executed on demand according to the execution plan schedule.

7. The method according to claim 1, wherein the recovery time (t_r) is determined using the following system parameters:

backup duration of saved data of the application system (t_b11), an amount of associated redologs (2,3) of the application system, throughput values for a backup of the redologs and an overall throughput for a recovery of the saved data with the associated redologs.

8. A computing system for calculating a recovery time of an application system in a computer system for tuning the computer system dynamically, the computing system comprising a calculating unit for calculating the recovery time (t_r) within flexible predefined time slices, a control unit for comparing the calculated recovery time with a predefined time period and an indicator unit for indicating when the calculated recovery time (t_r) exceeds the predefined time period (t₀).

9. The computing system according to claim 8, further comprising a monitor unit with the help of which the calculated recovery time (t_r) can be isochronously displayed for review.

10. The computing system according to claim 8, further comprising a generating unit (60) for generating an execution plan for the backup on the basis of the calculation of the recovery time (t_r), the execution plan comprising a schedule of the execution of the backup according to which the backup can be executed.

11. The computing system according claim 8, wherein the recovery time (t_r) is determined using the following system parameters:

backup duration of saved data of the application system, an amount of associated redologs of the application system, throughput values for a backup of the redologs and an overall throughput for a recovery of the saved data with the associated redologs.

12. A computer program product in a computer-readable medium for carrying out a method when the computer program is run on a computer comprising the step of calculating a recovery time (t_r) of an application system (DB) in a computer system for tuning the computer system dynamically, wherein the recovery time (t_r) is calculated and controlled within flexible predefined time slices and compared to a predefined time period (t₀) and a trigger is set in case that the calculated recovery time (t_r) exceeds the predefined time period (t₀).

13. (canceled)

14. (canceled)