When a bulk load client submits data for loading, Business Continuity Manager controls the data load operation on each target Teradata system. Bulk load operations are run independently across multiple Teradata systems, and automatic recovery and restarts occur if data loading is interrupted. Business Continuity Manager always runs the load checkpoint and load completions on the active system first. If successful, Business Continuity Manager then runs it on the standby system. If a checkpoint or load apply fails on the active system, Business Continuity Manager rolls back the load on all systems.
- Data cannot be loaded to one or more target systems due to target, error, or restart tables in the interrupted state or an unavailable target system.
- A data checkpoint did not occur on all systems, and there is insufficient memory to store the data in memory.
- A data checkpoint succeeds on the active system, but fails on the standby system.
Business Continuity Manager deletes landed data stored on the disk array after the data successfully loads to the Teradata systems, or the begin loading record of the bulk load job is overwritten in the recovery log. Management of the disk space by Business Continuity Manager reduces the total amount of disk space required for the load files.