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**To modify an Amazon DocumentDB cluster** The following ``modify-db-cluster`` example modifies the Amazon DocumentDB cluster ``sample-cluster`` by making the retention period for automatic backups 7 days, and changing the preferred windows for both backups and maintenance. All changes are applied at the next maintenance window. :: aws docdb modify-db-cluster \ --db-cluster-identifier sample-cluster \ --no-apply-immediately \ --backup-retention-period 7 \ --preferred-backup-window 18:00-18:30 \ --preferred-maintenance-window sun:20:00-sun:20:30 Output:: { "DBCluster": { "Endpoint": "sample-cluster.cluster-corcjozrlsfc.us-west-2.docdb.amazonaws.com", "DBClusterMembers": [ { "DBClusterParameterGroupStatus": "in-sync", "DBInstanceIdentifier": "sample-cluster", "IsClusterWriter": true, "PromotionTier": 1 }, { "DBClusterParameterGroupStatus": "in-sync", "DBInstanceIdentifier": "sample-cluster2", "IsClusterWriter": false, "PromotionTier": 2 } ], "HostedZoneId": "ZNKXH85TT8WVW", "StorageEncrypted": false, "PreferredBackupWindow": "18:00-18:30", "MultiAZ": true, "EngineVersion": "3.6.0", "MasterUsername": "master-user", "ReaderEndpoint": "sample-cluster.cluster-ro-corcjozrlsfc.us-west-2.docdb.amazonaws.com", "DBSubnetGroup": "default", "LatestRestorableTime": "2019-03-18T22:08:13.408Z", "EarliestRestorableTime": "2019-03-15T20:30:47.020Z", "PreferredMaintenanceWindow": "sun:20:00-sun:20:30", "AssociatedRoles": [], "EnabledCloudwatchLogsExports": [ "audit" ], "Engine": "docdb", "DBClusterParameterGroup": "default.docdb3.6", "DBClusterArn": "arn:aws:rds:us-west-2:123456789012:cluster:sample-cluster", "BackupRetentionPeriod": 7, "DBClusterIdentifier": "sample-cluster", "AvailabilityZones": [ "us-west-2a", "us-west-2c", "us-west-2b" ], "Status": "available", "DbClusterResourceId": "cluster-UP4EF2PVDDFVHHDJQTYDAIGHLE", "ClusterCreateTime": "2019-03-15T20:29:58.836Z", "VpcSecurityGroups": [ { "VpcSecurityGroupId": "sg-77186e0d", "Status": "active" } ], "Port": 27017 } } For more information, see `Modifying an Amazon DocumentDB Cluster <https://docs.aws.amazon.com/documentdb/latest/developerguide/db-cluster-modify.html>`__ in the *Amazon DocumentDB Developer Guide*.