# Nodetool cluster repair

**cluster repair** - A process that runs in the background and synchronizes the data between nodes. It only repairs keyspaces with tablets enabled (default).
To repair keyspaces with tablets disabled (vnodes-based), see [nodetool repair](https://docs.scylladb.com/manual/branch-2025.3/operating-scylla/nodetool-commands/repair.md).

Running `cluster repair` on a **single node** synchronizes all data on all nodes in the cluster.

To synchronize all data in clusters that have both tablets-based and vnodes-based keyspaces, run [nodetool repair -pr](https://docs.scylladb.com/manual/branch-2025.3/operating-scylla/nodetool-commands/repair.md) on **all**
of the nodes in the cluster, and [nodetool cluster repair](https://docs.scylladb.com/manual/branch-2025.3/operating-scylla/nodetool-commands/cluster/repair.md) on  **any** of the nodes in the cluster.

To check if a keyspace enables tablets, use:

```cql
DESCRIBE KEYSPACE `keyspace_name`
```

ScyllaDB node will ensure the exclusivity of tablet repair and maintenance operations (add/remove/decommission/replace/rebuild).

ScyllaDB nodetool cluster repair command supports the following options:

- `-dc` `--in-dc` syncs data between all nodes in a list of Data Centers (DCs).

  #### WARNING
  This command leaves part of the data subset (all remaining DCs) out of sync.

  For example:
  ```default
  nodetool cluster repair -dc US_DC
  nodetool cluster repair --in-dc US_DC, EU_DC
  ```
- `-hosts` `--in-hosts` syncs the data only between a list of nodes, using host ID.

  #### WARNING
  this command leaves part of the data subset (on nodes that are *not* listed) out of sync.

  For example:
  ```default
  nodetool cluster repair -hosts cdc295d7-c076-4b07-af69-1385fefdb40b,2dbdf288-9e73-11ea-bb37-0242ac130002
  nodetool cluster repair --in-hosts cdc295d7-c076-4b07-af69-1385fefdb40b,2dbdf288-9e73-11ea-bb37-0242ac130002,3a5993f8-9e73-11ea-bb37-0242ac130002
  ```
- `--tablet-tokens` selects which tablets to repair. When the listed token belongs to a tablet, the whole tablet that owns the token will be repaired. By default, all tablets are repaired.

  #### WARNING
  this command leaves part of the data subset (on nodes that are *not* listed) out of sync.

  For example:
  ```default
  nodetool cluster repair --tablet-tokens 1,10474535988
  ```
- `keyspace` executes a repair on a specific keyspace. The default is all keyspaces.

  For example:
  ```default
  nodetool cluster repair <my_keyspace>
  ```
- `table` executes a repair on a specific table or a list of space-delimited table names. The default is all tables.

  For example:
  ```default
  nodetool cluster repair <my_keyspace> <my_table>
  ```

See also [ScyllaDB Manager](https://manager.docs.scylladb.com/).