Run a do body repeatedly with script loop, once per keyset or range batch, each iteration in its own transaction. Control transactions, pacing, staged ramp-up, and external HTTP calls with the loop policy block.
Data Scripts are a declarative language for running data operations against a database: transactional mutations, reports, and batched loops, run with atlas script exec, query, and loop, with transactions, assertions, and output masking built in.
Run a set of writes as one transactional unit with script exec: SQL guards with condition, assert, and check, automatic rollback, and reads that feed writes.