# Computing suspect pairs and suspect sample from source data

This scenario applies only to subscription-based Talend Platform products with Big Data and Talend Data Fabric.

In this example, tMatchPairing uses a blocking key to compute the pairs of suspect duplicates in a list of early childhood education centers in Chicago.

The use case described here uses:

* a tFileInputDelimited component to read the source file, which contains a list of early childhood education centers in Chicago coming from ten different sources;

* a tMatchPairing component to pre-analyze the data, compute pairs of suspect duplicates and generate a pairing model which is used by the tMatchPredict component;

* three tFileOutputDelimited components to output the suspect duplicates, a sample of suspect pairs and the unique records; and

* a tLogRow component to output the exact duplicates.

### In this section

* [Setting up the Job](https://help.qlik.com/talend/en-US/data-matching/8.0/computing-suspect-pairs-suspect-sample-from-source-data-setting-up-job)
* [Selecting the Spark mode](https://help.qlik.com/talend/en-US/data-matching/8.0/selecting-spark-mode-spark-batch?id=110)
* [Configuring the input component](https://help.qlik.com/talend/en-US/data-matching/8.0/computing-suspect-pairs-suspect-sample-from-source-data-configuring-input-component)
* [Computing suspect duplicates, exact duplicates and unique rows](https://help.qlik.com/talend/en-US/data-matching/8.0/computing-suspect-duplicates-exact-duplicates-unique-rows)
* [Configuring the output components to write suspect pairs, suspect sample and unique rows](https://help.qlik.com/talend/en-US/data-matching/8.0/configuring-output-components-to-write-suspect-pairs-suspect-sample-unique-rows)
* [Configuring the log component to write exact duplicates](https://help.qlik.com/talend/en-US/data-matching/8.0/configuring-log-component-to-write-exact-duplicates)
* [Executing the Job to compute suspect pairs and suspect sample](https://help.qlik.com/talend/en-US/data-matching/8.0/executing-job-to-compute-suspect-pairs-and-suspect-sample)