# BDB replica sync field

```json metadata
{
  "title": "BDB replica sync field",
  "description": "Documents the bdb replica_sync field used with Redis Software REST API calls.",
  "categories": ["docs","operate","rs"],
  "tableOfContents": {"sections":[]}

,
  "codeExamples": []
}
```
The BDB `replica_sync` field relates to the [Replica Of](https://redis.io/docs/latest/operate/rs/databases/import-export/replica-of/create.md) feature, which enables the creation of a Redis database (single- or multi-shard) that synchronizes data from another Redis database (single- or multi-shard).

You can use the `replica_sync` field to enable, disable, or pause the [Replica Of](https://redis.io/docs/latest/operate/rs/databases/import-export/replica-of/create.md) sync process. The BDB `crdt_sync` field has a similar purpose for the Redis CRDB.

Possible BDB sync values:

| Status | Description | Possible next status |
|--------|-------------|----------------------|
| 'disabled' | (default value) Disables the sync process and represents that no sync is currently configured or running. | 'enabled' |
| 'enabled' | Enables the sync process and represents that the process is currently active. | 'stopped' <br />'paused' |
| 'paused' | Pauses the sync process. The process is configured but is not currently executing any sync commands. | 'enabled' <br />'stopped' |
| 'stopped' | An unrecoverable error occurred during the sync process, which caused the system to stop the sync. | 'enabled' |

![images/rs/rest-api-bdb-sync.png#no-click](https://redis.io/docs/latest/images/rs/rest-api-bdb-sync.png#no-click)

When the sync is in the 'stopped' or 'paused' state, then the `last_error` field in the relevant source entry in the `sync_sources` "status" field contains the detailed error message.