[Yandex Cloud documentation](../index.md) > [Yandex Managed Service for ClickHouse®](index.md) > Audit Trails events

# Yandex Audit Trails event reference

Audit Trails supports tracking [control plane](../audit-trails/concepts/format.md) and [data plane](../audit-trails/concepts/format-data-plane.md) events.

The general format of the `event_type` field value is as follows:

```text
yandex.cloud.audit.mdb.clickhouse.<event_name>
```

## Control plane event reference {#control-plane-events}

Event name | Description
--- | ---
`AddClusterHosts` | Adding new hosts to a cluster
`AddClusterShard` | Adding a shard to a cluster
`AddClusterShards` | Adding multiple shards to a cluster
`AddClusterZookeeper` | Adding a ZooKeeper subcluster to a cluster
`BackupCluster` | Creating backups
`CreateCluster` | Creating a cluster
`CreateClusterExtension` | Creating an extension
`CreateClusterExternalDictionary` | Creating an external dictionary
`CreateShardGroup` | Creating a shard group
`DeleteBackup` | Deleting backups
`DeleteCluster` | Deleting a cluster
`DeleteClusterExtension` | Deleting an extension
`DeleteClusterExternalDictionary` | Deleting an external dictionary
`DeleteClusterHosts` | Deleting hosts from a cluster
`DeleteClusterShard` | Deleting a shard from a cluster
`DeleteClusterShards` | Deleting multiple shards from a cluster
`DeleteShardGroup` | Deleting a shard group
`MoveCluster` | Moving a cluster
`RescheduleMaintenance` | Changing scheduled maintenance date and time
`RestartClusterHosts` | Restarting cluster hosts
`RestoreCluster` | Creating a new cluster from a backup
`SetClusterAccessBindings` | Assigning access permissions for a cluster
`StartCluster` | Starting a cluster
`StopCluster` | Stopping a cluster
`UpdateCluster` | Updating a cluster
`UpdateClusterAccessBindings` | Updating access permissions for a cluster
`UpdateClusterExtension` | Updating an extension
`UpdateClusterExternalDictionary` | Editing an external dictionary
`UpdateClusterHosts` | Editing hosts in a cluster
`UpdateClusterShard` | Editing a cluster shard
`UpdateShardGroup` | Editing a shard group

## Data plane event reference {#data-plane-events}

Event name | Description
--- | ---
`CreateDatabase` | Creating a database
`CreateFormatSchema` | Creating a data format schema
`CreateMlModel` | Creating a machine learning model
`CreateUser` | Creating a database user
`DatabaseUserLogin` | Connecting a user to a database
`DatabaseUserLogout` | Disconnecting a user from a database
`DatabaseUserSQLRequest` | User SQL query to a database
`DeleteDatabase` | Deleting a database
`DeleteFormatSchema` | Deleting a format schema
`DeleteMlModel` | Deleting a machine learning model
`DeleteUser` | Deleting a database user
`GetDatabase` | Getting database info
`GetUser` | Getting user info
`GrantUserPermission` | Assigning privileges to a database user
`ListDatabases` | Getting a list of databases
`ListUsers` | Getting a list of users
`RevokeUserPermission` | Revoking a database user's privileges
`SetClusterExtensions` | Installing cluster extensions
`UpdateFormatSchema` | Editing a data schema format
`UpdateMlModel` | Editing a machine learning model
`UpdateUser` | Editing a database user

_ClickHouse® is a registered trademark of [ClickHouse, Inc](https://clickhouse.com)._