Database move sequences

Database move sequences are generated by Activity Trends Resource Balancing in the Domino® Administrator. To move large groups of databases that include more than 25 moves, it groups them into sets of 25 moves or more, called demand sets. A demand set can involve any grouping of commands to be executed.

In the Domino Change Manager, these demand sets are called database move sequences. Each database move sequence has a maximum of 25 moves. The contents of each move sequence is generated automatically. You can see these database move sets when you submit a resource-balancing plan to the Domino Change Manager. You can restructure the contents by cutting and pasting the demands from one demand set into another or by creating additional demand sets and new demands. (To cut and paste, select a demand and use the Edit menu.) The Domino Administrator creates as many of these demand sets as needed to accomplish a move. For example, the Acme Move Plan includes 55 database moves, so the Domino Change Manager creates three database move sequences -- two that include 25 moves, and one that includes 5 moves.

You can determine whether the database moves and database move sequences are executed sequentially or concurrently or any combination of the two. By default, all are moved concurrently. Using the Acme Move Plan example, the Domino Change Manager attempts to perform all three database move sequences at the same time. Within each database move sequence, the Domino Change Manager attempts to move all databases at the same time.

What happens if a move fails

A database move can fail for a number of reasons. For example, a database move fails if a server is down, if the destination server does not have create replica rights, or if the source database has been manually moved or deleted. How the Domino Change Manager handles the failure depends on how the moves are executed:

  • Concurrently -- If any demand fails, the plan continues with other demands. When all demands are in a state of completion or failure, the plan reports a failure to the Domino Change Control database (DOMCHANGE.NSF). You can then retry the move, and the plan will attempt to complete only the demands that failed during the previous attempt.
  • Sequentially -- If any demand fails, the plan stops.