Category
Function
Partitions a data set for parallel processing.
Syntax
partitioned = Partition(input, n, size);
Inputs
| Name | Type | Default | Description |
|---|---|---|---|
| input | field or group | none | field to be partitioned |
| n | integer | machine dependent | maximum number of subparts |
| size | integer | one primitive | threshold for partitioning |
Outputs
| Name | Type | Description |
|---|---|---|
| partitioned | field or group | set of partitioned fields |
Functional Details
This module partitions a data set for parallel processing on an SMP multiprocessor machine. (You must be using Data Explorer SMP to take advantage of this feature.) Its output is a composite field, which is treated as a single entity by other modules.
input | is the input object to be partitioned. If this parameter specifies a group, each group member is partitioned with the same n and size parameters. |
n | is the approximate number of partitions to be created. However, the module will not create partitions smaller than size (see below). |
size | is the minimum number of connection elements per partition. If n × size is larger than the total number of points, the output number of partitions may be smaller than n If you do not specify n or size, appropriate default values are supplied, depending on the number of processors available. |
Note: On a uniprocessor machine, n = 1 by default. Consequently, the same programs can be run on uniprocessor and multiprocessor machines without modification.
Components
All components in the input are propagated to the output.
Example Visual Programs
ExampleSMP.net
See Also
[Data Explorer Home Page | Contact Data Explorer | Same document on Data Explorer Home Page ]