---
title: "POST /#X-Amz-Target=AWSServerMigrationService_V2016_10_24.StartOnDemandReplicationRun"
method: POST
path: "/#X-Amz-Target=AWSServerMigrationService_V2016_10_24.StartOnDemandReplicationRun"
---

# POST /#X-Amz-Target=AWSServerMigrationService_V2016_10_24.StartOnDemandReplicationRun

`POST /#X-Amz-Target=AWSServerMigrationService_V2016_10_24.StartOnDemandReplicationRun`

Starts an on-demand replication run for the specified replication job. This replication run starts immediately. This replication run is in addition to the ones already scheduled.

There is a limit on the number of on-demand replications runs that you can request in a 24-hour period.

## Headers

- `X-Amz-Target` 'AWSServerMigrationService_V2016_10_24.StartOnDemandReplicationRun', required

## Request body

- StartOnDemandReplicationRunRequest
  - `replicationJobId` string, required — The ID of the replication job.
  - `description` string — The description of the replication run.

## Response `200`

Success

- StartOnDemandReplicationRunResponse
  - `replicationRunId` string — The ID of the replication run.

## Other responses

- `480` — InvalidParameterException
- `481` — MissingRequiredParameterException
- `482` — UnauthorizedOperationException
- `483` — OperationNotPermittedException
- `484` — ReplicationRunLimitExceededException
- `485` — DryRunOperationException

---

[API](https://skmtc.net/aws/apis/sms.md) · [All operations](https://skmtc.net/aws/apis/sms/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/aws/sms/versions/b93b64b4502e/schema)