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EP0769741A1
Expired / Lapsed
EP
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variable-level backup scheduling method and apparatus
Assignee: Compaq Computer Corp
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Filing: 1996-10-18
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Granted: —
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Expires: 2016-10-18
Abstract
Abstract The variable-level backup scheduling method employs a schedule in which backups are performed at set times but the level of backup performed is determined from the condition of the system at the time of backup. Under this method, user-supplied parameters stored in level-tables allow a determination of the appropriate level of backup to be performed. If the data in the scheduled level of backup has not been modified in a sufficient amount under the supplied parameters, then the backup scheduling method determines whether a specified higher level backup is appropriate. If the evaluation of the higher level backup results in a determination that not enough data has been modified, the next level is evaluated. This process continues until the criteria for backup have been met or the level that has been predetermined to be the least amount of data to be saved has been reached.
Inventors
- 👤 Paul David Saxon
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 23:16
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/07; G06F11/14; G06F11/1446; G06F11/1448; G06F11/1451; G06F11/1458; G06F11/1461
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
104 words
A method of backing up data in a computer system, comprising: establishing a plurality of backup levels, each said backup level having an associated criterion for performing a backup of said backup level, and each said backup level having an established set of data to be written to a backup storage apparatus during performance of a backup at said backup level; testing said associated criteria against changes in data stored in the computer system; and performing a backup at a selected backup level by writing said established set of data to said backup storage apparatus, said selected backup level being selected by said testing.
Claim 2
Dependent Claim
12 words
The method of claim 1 wherein said associated criterion is a level-table.
Claim 3
Dependent Claim
35 words
The method of claim 1 wherein the step of testing said associated criterion further comprises: determining the amount of unmodified data in the computer system in response to date and time information from previous backups.
Claim 4
Dependent Claim
29 words
The method of claim 2 wherein the step of testing said associated criterion further comprises: comparing changes in data stored in the computer system with parameters in said level-table.
Claim 5
Independent Claim
107 words
An apparatus to back up a computer system, comprising: means for establishing a plurality of backup levels, each said backup level having associated criteria for performing a backup of said backup level, and each said backup level having an established set of data to be written to a backup storage apparatus during performance of a backup at said backup level; means for testing said associated criteria against changes in data stored in the computer system; and means for performing a backup at a selected backup level by writing said established set of data to said backup storage apparatus, said selected backup level being selected by said testing.
Claim 6
Dependent Claim
12 words
The apparatus of claim 5 wherein said associated criteria is a level-table.
Claim 7
Dependent Claim
14 words
The apparatus of claim 5 wherein said backup storage apparatus is a tape drive.
Claim 8
Dependent Claim
22 words
The apparatus of claim 5 wherein said backup storage apparatus is a storage device connected to the computer system across a network.
Claim 9
Dependent Claim
119 words
A method of backing up a computer as in claim 1, wherein said step of testing comprises: reading in date and time information from previous backups; reading in the current backup level; determining the amount of unmodified data in the computer system in response to the date and time information; comparing the amount of unmodified data in the computer system to parameters in a level-table for a scheduled level; wherein said step of performing a backup comprises: invoking a backup command at the scheduled level if the amount of unmodified data is less than parameters in said level-table; and moving to a next backup level if the amount of unmodified data is not less than parameters in said level-table.
Claim 10
Dependent Claim
41 words
The method of claim 9 further comprising the steps of: repeating the steps of comparing unmodified data and moving to a next backup level until a predefined highest level is reached; and invoking the backup command at said predefined highest level.
Claim 11
Dependent Claim
30 words
The method of claim 9 further comprising the step of storing backed up data from the computer system on a storage device connected to the computer system by a network.
References Cited (Backward Citations)
EP0410630A2
Cited
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