numpartitions

Number of partitions for MDF datastore

Syntax

N = numpartitions(mdfds)

N = numpartitions(mdfds,pool)

Description

N = numpartitions(mdfds) returns the recommended number of partitions for the MDF datastore mdfds. Use the result as an input to the partition function.

N = numpartitions(mdfds,pool) returns a reasonable number of partitions to parallelize mdfds over the parallel pool, pool, based on the number of files in the datastore and the number of workers in the pool.

Examples

Find Recommended Number of Partitions for MDF Datastore

Determine the number of partitions you should use for your MDF datastore.

mdfds = mdfDatastore("C:\myMDFData\CANape.MF4");
N = numpartitions(mdfds); 

Input Arguments

mdfds — MDF datastore

MDF datastore object

MDF datastore, specified as an MDF datastore object.

Example: mdfds = mdfDatastore("CANape.MF4")

pool — Parallel pool

parallel pool object

Parallel pool specified as a parallel pool object.

Example: gcp

Output Arguments

N — Number of partitions

double

Number of partitions, returned as a double. This number is the calculated recommendation for the number of partitions for your MDF datastore. Use this when partitioning your datastore with the partition function.

Version History

Introduced in R2017b