<p>The number of days for which automated backups are retained. You must specify a minimum value of 1.</p> <p>Default: 1</p> <p>Constraints:</p> <ul> <li> <p>Must be a value from 1 to 35</p> </li> </ul>

<p>The DB cluster identifier. This parameter is stored as a lowercase string.</p> <p>Constraints:</p> <ul> <li> <p>Must contain from 1 to 63 letters, numbers, or hyphens.</p> </li> <li> <p>First character must be a letter.</p> </li> <li> <p>Cannot end with a hyphen or contain two consecutive hyphens.</p> </li> </ul> <p>Example: <code>my-cluster1</code> </p>

<p> The name of the DB cluster parameter group to associate with this DB cluster. If this argument is omitted, the default is used.</p> <p>Constraints:</p> <ul> <li> <p>If supplied, must match the name of an existing DBClusterParameterGroup.</p> </li> </ul>

<p>A DB subnet group to associate with this DB cluster.</p> <p>Constraints: Must match the name of an existing DBSubnetGroup. Must not be default.</p> <p>Example: <code>mySubnetgroup</code> </p>

<p>The name of the database engine to be used for this DB cluster.</p> <p>Valid Values: <code>neptune</code> </p>

<p>The version number of the database engine to use for the new DB cluster.</p> <p>Example: <code>1.0.2.1</code> </p>

<p>The port number on which the instances in the DB cluster accept connections.</p> <p> Default: <code>8182</code> </p>

<p>The daily time range during which automated backups are created if automated backups are enabled using the <code>BackupRetentionPeriod</code> parameter.</p> <p>The default is a 30-minute window selected at random from an 8-hour block of time for each Amazon Region. To see the time blocks available, see <a href="https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/AdjustingTheMaintenanceWindow.html"> Adjusting the Preferred Maintenance Window</a> in the <i>Amazon Neptune User Guide.</i> </p> <p>Constraints:</p> <ul> <li> <p>Must be in the format <code>hh24:mi-hh24:mi</code>.</p> </li> <li> <p>Must be in Universal Coordinated Time (UTC).</p> </li> <li> <p>Must not conflict with the preferred maintenance window.</p> </li> <li> <p>Must be at least 30 minutes.</p> </li> </ul>

<p>The weekly time range during which system maintenance can occur, in Universal Coordinated Time (UTC).</p> <p>Format: <code>ddd:hh24:mi-ddd:hh24:mi</code> </p> <p>The default is a 30-minute window selected at random from an 8-hour block of time for each Amazon Region, occurring on a random day of the week. To see the time blocks available, see <a href="https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/AdjustingTheMaintenanceWindow.html"> Adjusting the Preferred Maintenance Window</a> in the <i>Amazon Neptune User Guide.</i> </p> <p>Valid Days: Mon, Tue, Wed, Thu, Fri, Sat, Sun.</p> <p>Constraints: Minimum 30-minute window.</p>

<p>The Amazon KMS key identifier for an encrypted DB cluster.</p> <p>The KMS key identifier is the Amazon Resource Name (ARN) for the KMS encryption key. If you are creating a DB cluster with the same Amazon account that owns the KMS encryption key used to encrypt the new DB cluster, then you can use the KMS key alias instead of the ARN for the KMS encryption key.</p> <p>If an encryption key is not specified in <code>KmsKeyId</code>:</p> <ul> <li> <p>If <code>ReplicationSourceIdentifier</code> identifies an encrypted source, then Amazon Neptune will use the encryption key used to encrypt the source. Otherwise, Amazon Neptune will use your default encryption key.</p> </li> <li> <p>If the <code>StorageEncrypted</code> parameter is true and <code>ReplicationSourceIdentifier</code> is not specified, then Amazon Neptune will use your default encryption key.</p> </li> </ul> <p>Amazon KMS creates the default encryption key for your Amazon account. Your Amazon account has a different default encryption key for each Amazon Region.</p> <p>If you create a Read Replica of an encrypted DB cluster in another Amazon Region, you must set <code>KmsKeyId</code> to a KMS key ID that is valid in the destination Amazon Region. This key is used to encrypt the Read Replica in that Amazon Region.</p>

<p>If set to <code>true</code>, enables Amazon Identity and Access Management (IAM) authentication for the entire DB cluster (this cannot be set at an instance level).</p> <p>Default: <code>false</code>.</p>