History¶

Canonical path: o6.server.History

Root shortcut: o6.History

History `dataclass` ¶

Per-variable history settings accepted by historizing=.

historizing=True selects History().

Attributes:

Name	Type	Description
`capacity`	`Optional[int]`	Samples retained per node. Zero uses the database default; None selects unbounded growth. A bounded store evicts oldest samples.
`strategy`	`str`	"on-write" records Writes, "poll" samples through an internal MonitoredItem, and "manual" requires explicit insertion.
`interval`	`float`	Poll interval in seconds, converted to native milliseconds.

capacity = 0

strategy = 'on-write'

interval = 1.0

__post_init__()

__init__(capacity=0, strategy='on-write', interval=1.0)