Tracking fields

Models built on databases (whether SQL or NoSQL) allow you to specify a tracking field. This will most commonly be an updated_at or last_modified field (for the technical crowd: any monotonically-increasing field will do).

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.

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Data Backfills

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.