A sync watermark is a progress or time marker that indicates up to which point data has been reconciled. Such markers prevent blind full scans and make it traceable how current a cache is. In multi-instance systems, each instance can carry its own watermarks.
Central Command uses watermark information so that operations and the UI can assess the sync state. If a watermark stands still, that points to errors, pauses, or an absence of changes. If it moves regularly, the reconciliation is alive. Together with timestamps, transparency replaces a black box.
Watermarks are a technical detail with practical value: less API load, clearer diagnostics, more honest metrics. Anyone reading dashboard values is indirectly reading sync health as well. Central Command turns this into operational confidence — provided jobs run and limits are respected.
