Epoch fields

An epoch identifies one inventory and the deltas and monitor rows that follow it, for one device and topic.

Field	Type	Unit	Meaning
sparklogs.epoch.id	string		Globally unique inventory epoch ID. Parts and subsequent changes share this ID.
sparklogs.epoch.prev_id	string		Previous epoch ID for this agent and topic. Absent for the first epoch or after stored state was cleared.
sparklogs.epoch.seq	integer	count	Epoch sequence for this agent and topic, starting at 1. It can repeat after a crash or state reset; use the epoch ID for identity.
sparklogs.epoch.t	string	timestamp	When this epoch's inventory was observed: its t, repeated on every part and on every change row of the epoch. Inventory and change rows only.
sparklogs.epoch.prev_t	string	timestamp	When the previous epoch's inventory was observed, kept across an agent restart. Absent with prev_id. Inventory and change rows only.