Data integrity in a database environment through background synchronization

• US 8,380,663 B2
• Filed: 12/17/2008
• Issued: 02/19/2013
• Est. Priority Date: 12/17/2008
• Status: Active Grant

• Current Assignee: iAnywhere Solutions Incorporated (SAP SE)
• Original Assignee: Sybase Incorporated (SAP SE)
• Inventors: Thode, Michael
• Primary Examiner(s): MORRISON, JAY A
• Application Number:
  US12/336,693
• Publication Number:
  US 20100153346A1
• Time in Patent Office: 1,525 Days
• Field of Search: None
• US Class Current: 707/610
• CPC Class Codes: G06F 16/273 Asynchronous replication or reconciliation

Abstract

Systems, methods and computer program products for maintaining data integrity in a database environment are described. In operation, a synchronization process is initiated in a remote database system for synchronization of remote data from the remote database system with consolidated data of a consolidated database. Metadata for each row of the remote data is utilized to allow transactional access to the remote data while the synchronization process occurs.

Claims

1. A method for ensuring data integrity in a database environment, the method comprising:

maintaining metadata indicating a row condition state of each respective row of remote data from a remote database system prior to initiating a process for synchronization of the remote data from the remote database system with consolidated data of a consolidated database, wherein the remote data comprises a subset of the consolidated data, the row condition state indicating whether said each row is included in the synchronization;

upon initiating the process for synchronization, creating a snapshot including the remote data to be uploaded to the consolidated database as determined based on the row condition state of each row as maintained prior to the initiating the process for synchronization; and

wherein the synchronization is based on the snapshot and allows transactional access and updates to the remote data included in the synchronization to occur while the synchronization occurs, wherein the updates are not included in the snapshot, and wherein the consolidated database includes the consolidated data synchronized with the remote data of the snapshot upon a completion of the synchronization.

2. The method of claim 1, wherein the row condition state includes an insert state value, a delete state value, and a commit state value.

3. The method of claim 1 wherein the row condition includes an upload condition value that is updated during the synchronization process.

4. The method of claim 1, further comprising:

determining that a delete value of the metadata for a particular row indicates said particular row is marked for deletion from the database; and

removing said particular row without updating the database based on a determination that a commit value of the metadata for said particular row indicates that said particular row was not previously committed to the database.

5. The method of claim 3 wherein a first upload condition value indicates that no transaction commits have occurred after initiation of the synchronization.

6. The method of claim 5 wherein a second upload condition value indicates that a row requires synchronization.

7. The method of claim 6 wherein a third upload condition value indicates that a row does not require synchronization.

8. The method of claim 3 further comprising setting at least the upload condition value when a commit of a row occurs during the synchronization and clearing at least the upload condition value when the synchronization completes.

9. The method of claim 3 wherein each row condition state allows for three conditions.

10. A system for ensuring data integrity in a database environment, the system comprising:

a database manager coupled to a communication network and including a consolidated database,

wherein the database manager is configured to perform a data synchronization process and maintain metadata indicating a row condition state of each respective row of remote data from at least one remote database system coupled to the communication network prior to initiating a process for synchronization of the remote data from the at least one remote database with consolidated data of the consolidated database, the row condition state indicating whether said each row is included in a synchronization, and the process comprising;

upon initiating the process for synchronization, creating a snapshot including the remote data to be uploaded to the consolidated database as determined based on the row condition state of each row as maintained prior to the initiating the process for synchronization, and

wherein the synchronization is based on the snapshot and allows transactional access and updates to the remote data included in the synchronization to occur while the synchronization occurs, wherein the updates are not included in the snapshot, and wherein the consolidated database includes the consolidated data synchronized with the remote data of the snapshot upon a completion of the synchronization.

11. The system of claim 10 wherein the metadata includes one or more values that indicate whether a respective row is inserted or deleted, included or excluded, and committed or not committed during the synchronization.

12. The system of claim 10 wherein the at least one remote database system identifies when the synchronization process is initiated while a database transaction occurs in the at least one remote database and determines at least an upload value condition when a commit of a row occurs to condition row processing during the synchronization.

13. The system of claim 12 wherein a first upload condition value indicates that no transaction commits have occurred after initiation of the synchronization, wherein a second upload condition value indicates that a row requires synchronization, and wherein a third upload condition value indicates that a row does not require synchronization.

14. The system of claim 10 wherein the at least one remote database system comprises a mobile computing device.

15. The system of claim 10, wherein upon completion of the synchronization, the consolidated data includes changes in the remote data as included in the snapshot, and wherein metadata for the updates to the remote data includes an indication for inclusion in a subsequent synchronization with the consolidated database.

16. A computer program product comprising a non-transitory computer useable medium having computer program logic recorded thereon for enabling a processor to perform instructions to determine data integrity in a database environment, the instructions comprising:

instructions for enabling a processor to maintain metadata indicating a row condition state of each respective row of remote data from a remote database prior to initiating a process for synchronization of the remote data with consolidated data of a consolidated database, the row condition state indicating whether said each row is included in the synchronization;

instructions for enabling a processor to, upon initiating the process for synchronization, create a snapshot including the remote data to be uploaded to the consolidated database as determined based on the row condition state of each row as maintained prior to the initiating the process for synchronization; and

instructions for enabling a processor to perform the synchronization of the consolidated database with the remote data based on the snapshot, wherein the synchronization allows transactional access and updates to the remote data included in the synchronization to occur while the synchronization occurs, wherein the updates are not included in the snapshot, and wherein the consolidated database includes the consolidated data synchronized with the remote data of the snapshot upon a completion of the synchronization.

17. The computer program product of claim 16, wherein said instructions further comprise:

instructions for enabling a processor to maintain the row condition state including an insert state value, a delete state value, and a commit state value for each row of the remote data in the remote database system.

18. The computer program product of claim 16, wherein the metadata includes another value indicating whether the remote data of the row has been uploaded from the remote device but has not yet been confirmed as being committed to the consolidated database.

19. The computer program product of claim 17, wherein said instructions for maintaining the metadata comprise:

instructions for enabling a processor to include at least an upload condition value to condition row processing during the synchronization.

20. The computer program product of claim 19, wherein said instructions further comprise instructions for enabling a processor to set at least the upload condition value when a commit of a row occurs during the synchronization and clear at least the upload condition value when the synchronization completes.

21. The computer program product of claim 19, wherein said instructions further comprise instructions for enabling a processor to indicate a first upload condition value when no transaction commits have occurred after initiation of the synchronization, a second upload condition value for a row that requires synchronization, and a third upload condition value for a row that does not require synchronization.