> For the complete documentation index, see [llms.txt](https://atomic-blend.gitbook.io/mongo2pg/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://atomic-blend.gitbook.io/mongo2pg/operating-a-migration/operations.md).

# Operating a migration

A migration runs in one straight line of commands, then keeps streaming until you decide to cut over:

```bash
mongo2pg schema plan  --config mapping.yaml   # review the generated migrations first
mongo2pg schema apply --config mapping.yaml   # create the target tables
mongo2pg run          --config mapping.yaml   # backfill, then stream — the long-running command
```

While `run` is streaming, three commands answer the questions an operator actually has:

```bash
mongo2pg status                               # phases, lag, quarantine, readiness — one shot
mongo2pg verify                               # counts, checksums, re-mapped samples
mongo2pg cutover check                        # exit 0 means safe to switch
```

Every flag on every command is in the [CLI reference](/mongo2pg/reference/cli-reference.md). This section covers the *procedure* around them:

* [Cutover procedure](/mongo2pg/operating-a-migration/operations/cutover.md) — stop writers, gate, flip, rollback window, retire.
* [Verification and checks](/mongo2pg/operating-a-migration/operations/verification-and-checks.md) — exactly what `verify` and `cutover check` compute, and every condition the gate enforces.
* [Handling quarantine](/mongo2pg/operating-a-migration/operations/handling-quarantine.md) — what to do when a document is parked.
* [Operational realities](/mongo2pg/operating-a-migration/operations/operational-realities.md) — the things that only show up once you run this against a real database, not from reading the code.


---

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