SqlTargetPersistor(targetName: String, targetJndi: String, context: String, varcharPadding: Int)
create and writes out "deduped" data to a sql table. targetName is the table name in the javax.sql.DataSource configured in the targetJndi for the associated context. varcharPadding is a number of extra bytes which can be configured if the target needs larger varchar fields than were extracted by the source.