HP 3000 Manuals HP 3000 Manuals
Chapter 3 Soft Resynchronization This chapter discusses how to set up and use the master and slave soft resynchronization applications provided with ALLBASE/Replicate. These applications provide working soft resynchronization programs that you can use to keep a master and slave DBEnvironment, or specified partitions synchronized with each other. Other issues that you must consider in preparation and some guidelines for modifying the behavior of the applications are also provided in this chapter The ALLBASE/Replicate applications keep one master and slave DBEnvironment synchronized at a time. If you want to synchronize more than one slave DBEnvironment with the master at the same time, run a master and slave resynchronization application pair for each slave DBEnvironment that you want to keep synchronized with the master. For example, if you want to replicate one master to two separate slave DBEnvironments, you would need to run two master resynchronization applications on the master system and one slave resynchronization application on each of the two slave systems. This is a total of four executing applications. For more information on the number of master/slave application pairs needed for a specific configuration of ALLBASE/Replicate see the topic, "Four Typical Partition Configurations," in chapter 2. The topics in this chapter are the following: * Setting up Soft Resynchronization * Error Messages in Batch Mode * Effects of Operating System Priority Although some discussion is given to considerations related to more complex ALLBASE/Replicate configurations, examples within each topic assume a system having one master and one slave DBEnvironment. These are the steps in setting up soft resynchronization: 1. Creating the master DBEnvironment. 2. Loading the master. 3. Starting the master DBEnvironment. 4. Adding log files to the master. 5. Verifying master startup parameters. 6. Backing up the master DBEnvironment. 7. Making preparations on the master for slave creation. 8. Creating the slave DBEnvironment. 9. Loading the slave. 10. Starting the slave DBEnvironment. 11. Adding log files to the slave. 12. Verifying slave startup parameters. 13. Backing up the slave DBEnvironment. 14. Setting soft resynchronization options on the slave. 15. Starting the soft resynchronization process on the slave. 16. Obtaining the slave nodename for starting the master. 17. Setting soft resynchronization options on the master. 18. Starting the soft resynchronization process on the master. 19. Testing the soft resynchronization application on the master. 20. Testing the soft resynchronization application on the slave. 21. Removing test transactions from the master. 22. Verifying removal of test transactions from the slave. 23. Terminating the soft resynchronization process.