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one of my steps in a job has a chunk(reader,processor& writer) whose commit-interval is 10 and skip-limit is 200.
Flat file from which the data is read has got 10 records out of which 9 are valid.5th record is invalid.
when reader completes reading 10 records , processor processes the 9 valid records and sends it to writer.
once the writer writes the 9 records to the DB, instead of terminating processor is called for each of the 9 records and then writer.
processor --> writer flow is executed for 9 times like this.
If the Flat file has got all valid records, it executes in the normal way reads 10 records and writes to the DB.