005·75

idempotency

/ˌaɪ.dɛm.ˈpɒ.tən.si/ - n.

1 [colloq.] The property everyone assumed the job had until the day it ran twice.Keep. Punchy.This is the problem.

Working definition

2. The property that running a pipeline operation multiple times produces the same result as running it once, so retries and replays do not duplicate or corrupt data.

Promoted

See also

backfillRe-running history to match the present, and discovering history had a different opinion about what 'customer' meant.
dead-letter queueWhere the records that could not be processed go to be inspected, in the same sense that a junk drawer is a filing system.
exactly-onceA guarantee printed on the slide and approximated in the system.
replayLiving the same afternoon again, this time with the join written correctly.