You can specify whether your stage runs sequentially or
in parallel, whether underlying operators can be combined into a single
process, and whether the job should try to maintain data in current
partitions.
About this task
The execution options are set in the Advanced section of the
Stage tab.
Procedure
- Specify the sequential or parallel execution in the Execution
Mode list. If the execution mode for a particular stage
cannot be changed, the list is not displayed.
- Specify the combinability mode by selecting an option from
the Combinability mode list. Select one of
the following options:
Option |
Description |
Auto |
Use the default combination setting for this operator. |
Combinable |
Ignore the default setting and combine operators if possible. |
Do not combine |
Never combine operators. |
- Specify whether the stage requires that the data partitioning
is preserved by the next stage in the job by selecting one of the
following options from the Preserve partitioning list:
Option |
Description |
Set |
Specifies that the next stage must preserve data partitioning
if possible. |
Clear |
Specifies the partitioning method that the next stage uses
is not relevant. |
Propagate |
Specifies that the stage uses the option that the previous
stage in the job has used. |