Hello, How Meltano support failure internally? Let's say I'm backfilling the data and It take 1 day to complete it. If process stops somehow then how Meltano resume the process ?

The replication methods,

INCREMENTAL

and

LOG_BASED

both produce

state

messages which meltano can use to hold information about the progress of loading. If your process fails during a sync operation using these methods then Meltano will use the state to resume loading. Read more here: https://docs.meltano.com/concepts/state_backends

Yes I saw that but It only write the state at the end of the process

Some taps write state messages periodically during the process

Do you have any example ?

We use tap-oracle, tap-db2, tap-mssql * all of which periodically write state messages and we have encountered failures and resumed successfully