# Create One Managed Namespace in One Global Cluster

**POST /api/atlas/v1.0/groups/{groupId}/clusters/{clusterName}/globalWrites/managedNamespaces**

Creates one managed namespace within the specified global cluster. A managed namespace identifies a collection using the database name, the dot separator, and the collection name. To use this resource, the requesting Service Account or API Key must have the Project Data Access Admin role.

[Global Clusters](https://www.mongodb.com/ko-kr/docs/atlas/global-clusters/)

## Servers
- https://cloud.mongodb.com: https://cloud.mongodb.com ()


## Authentication methods
- Service accounts
- Digest auth


## Parameters

#### Path parameters
- **groupId** (string)
  Unique 24-hexadecimal digit string that identifies your project. Use the [/groups](#tag/Projects/operation/listProjects) endpoint to retrieve all projects to which the authenticated user has access.

**NOTE**: Groups and projects are synonymous terms. Your group id is the same as your project id. For existing groups, your group/project id remains the same. The resource and corresponding endpoints use the term groups.
- **clusterName** (string)
  Human-readable label that identifies this cluster.

#### Query parameters
- **envelope** (boolean)
  Flag that indicates whether Application wraps the response in an `envelope` JSON object. Some API clients cannot access the HTTP response headers or status code. To remediate this, set envelope=true in the query. Endpoints that return a list of results use the results object as an envelope. Application adds the status parameter to the response body.
- **pretty** (boolean)
  Flag that indicates whether the response body should be in the prettyprint format.

## Body parameters
Content-type: application/json
Managed namespace to create within the specified global cluster.
- **collection** (string)
  Human-readable label of the collection to manage for this Global Cluster.
- **customShardKey** (string)
  Database parameter used to divide the *collection* into shards. Global clusters require a compound shard key. This compound shard key combines the location parameter and the user-selected custom key.
- **db** (string)
  Human-readable label of the database to manage for this Global Cluster.
- **isCustomShardKeyHashed** (boolean)
  Flag that indicates whether someone hashed the custom shard key for the specified collection. If you set this value to `false`, MongoDB Cloud uses ranged sharding.
- **isShardKeyUnique** (boolean)
  Flag that indicates whether someone [hashed](https://www.mongodb.com/ko-kr/docs/manual/reference/method/sh.shardCollection/#hashed-shard-keys) the custom shard key. If this parameter returns `false`, this cluster uses [ranged sharding](https://www.mongodb.com/ko-kr/docs/manual/core/ranged-sharding/).
- **numInitialChunks** (integer(int64))
  Minimum number of chunks to create initially when sharding an empty collection with a [hashed shard key](https://www.mongodb.com/ko-kr/docs/manual/core/hashed-sharding/).
- **presplitHashedZones** (boolean)
  Flag that indicates whether MongoDB Cloud should create and distribute initial chunks for an empty or non-existing collection. MongoDB Cloud distributes data based on the defined zones and zone ranges for the collection.

## Responses
### 200: OK

#### Body Parameters: application/json (object)
- **customZoneMapping** (object)
  List that contains comma-separated key value pairs to map zones to geographic regions. These pairs map an ISO 3166-1a2 location code, with an ISO 3166-2 subdivision code when possible, to a unique 24-hexadecimal string that identifies the custom zone.

 The 24-hexadecimal string corresponds to a `Replication Specifications` `id` property.

This parameter returns an empty object if no custom zones exist.
- **managedNamespaces** (array[object])
  List that contains a namespace for a Global Cluster. MongoDB Cloud manages this cluster.
- **selfManagedSharding** (boolean)
  Boolean that controls which management mode the Global Cluster is operating under. If this parameter is true Self-Managed Sharding is enabled and users are in control of the zone sharding within the Global Cluster. If this parameter is false Atlas-Managed Sharding is enabled and Atlas is control of zone sharding within the Global Cluster.

### 400: Bad Request.

#### Body Parameters: application/json (object)
- **badRequestDetail** (object)
  Bad request detail.
- **detail** (string)
  Describes the specific conditions or reasons that cause each type of error.
- **error** (integer(int32))
  HTTP status code returned with this error.
- **errorCode** (string)
  Application error code returned with this error.
- **parameters** (array[object])
  Parameters used to give more information about the error.
- **reason** (string)
  Application error message returned with this error.

### 401: Unauthorized.

#### Body Parameters: application/json (object)
- **badRequestDetail** (object)
  Bad request detail.
- **detail** (string)
  Describes the specific conditions or reasons that cause each type of error.
- **error** (integer(int32))
  HTTP status code returned with this error.
- **errorCode** (string)
  Application error code returned with this error.
- **parameters** (array[object])
  Parameters used to give more information about the error.
- **reason** (string)
  Application error message returned with this error.

### 403: Forbidden.

#### Body Parameters: application/json (object)
- **badRequestDetail** (object)
  Bad request detail.
- **detail** (string)
  Describes the specific conditions or reasons that cause each type of error.
- **error** (integer(int32))
  HTTP status code returned with this error.
- **errorCode** (string)
  Application error code returned with this error.
- **parameters** (array[object])
  Parameters used to give more information about the error.
- **reason** (string)
  Application error message returned with this error.

### 404: Not Found.

#### Body Parameters: application/json (object)
- **badRequestDetail** (object)
  Bad request detail.
- **detail** (string)
  Describes the specific conditions or reasons that cause each type of error.
- **error** (integer(int32))
  HTTP status code returned with this error.
- **errorCode** (string)
  Application error code returned with this error.
- **parameters** (array[object])
  Parameters used to give more information about the error.
- **reason** (string)
  Application error message returned with this error.

### 405: Method Not Allowed.

#### Body Parameters: application/json (object)
- **badRequestDetail** (object)
  Bad request detail.
- **detail** (string)
  Describes the specific conditions or reasons that cause each type of error.
- **error** (integer(int32))
  HTTP status code returned with this error.
- **errorCode** (string)
  Application error code returned with this error.
- **parameters** (array[object])
  Parameters used to give more information about the error.
- **reason** (string)
  Application error message returned with this error.

### 500: Internal Server Error.

#### Body Parameters: application/json (object)
- **badRequestDetail** (object)
  Bad request detail.
- **detail** (string)
  Describes the specific conditions or reasons that cause each type of error.
- **error** (integer(int32))
  HTTP status code returned with this error.
- **errorCode** (string)
  Application error code returned with this error.
- **parameters** (array[object])
  Parameters used to give more information about the error.
- **reason** (string)
  Application error message returned with this error.


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