The differences between the Simple VSR Matcher and the T-Swoosh algorithms
When processing the input data using the T-Swoosh algorithm, there
may be more iterations than the number of input records because a merged record may be
created on each iteration and added to the queue.
This is one of the main differences between the Simple VSR Matcher and the T-Swoosh algorithms.
When comparing a record with a master record, the T-Swoosh algorithm makes more
comparisons per iteration than the Simple VSR matcher algorithm:
- When using the Simple VSR matcher algorithm, the record from the queue is only compared with the value of the master record. There is no comparison between the record from the queue and the value of each of the records used to build this master record. Then, sort the input records so that the most trustworthy records appear first in the input data.
- When using the T-Swoosh algorithm, the record from the queue is compared with
the value of the master record and the value of each of the records used to
build this master record, until records are considered a match.
For an example of how to survive master records using the T-Swoosh algorithm, see The T-Swoosh algorithm.
You can find an example of how to survive master records using the T-Swoosh algorithm in Talend Help Center (https://help.talend.com).
In this example, the record "John Doe, John B. Doe" is compared with the record "John B. Doe" on iteration 5. There is a match if at least one of the three strings "John Doe, John B. Doe", "John Doe" and "John B. Doe" matches the string "Johnnie B. Doe".