Models built on databases (whether SQL or NoSQL) allow you to specify a tracking field. Typically this will be an
last_modified field (for the technical crowd: any field that is monotonically-increasing with each update).
Setting this would result in much lighter queries to your database, as Polytomic would monitor this field to detect changes to your data rather than running full queries and comparing their results with last time.
If you change your sync configuration to include new mappings, data will not backfill for records already synced in the past. The way to backfill is to click the 'Force full resync' button on the Sync Status page.
Updated about 2 months ago