{
    "members": [
        {
            "procParams": {
                "ipv6": true,
                "nohttpinterface": true,
                "journal": true,
                "noprealloc": true,
                "nssize": 1,
                "smallfiles": true
            },
            "rsParams": {
                "priority": 99,
                "tags": {
                    "ordinal": "one",
                    "dc": "ny"
                }
            }
        },
        {
            "procParams": {
                "ipv6": true,
                "nohttpinterface": true,
                "journal": true,
                "storageEngine": "wiredTiger"
            },
            "rsParams": {
                "priority": 1.1,
                "tags": {
                    "ordinal": "two",
                    "dc": "pa"
                }
            }
        },
        {
            "procParams": {
                "ipv6": true,
                "nohttpinterface": true,
                "journal": true,
                "noprealloc": true,
                "nssize": 1,
                "smallfiles": true
            },
            "rsParams": {
                "arbiterOnly": true
            }
        }
    ]
}

{
    "members": [
        {
            "procParams": {
                "ipv6": true,
                "nohttpinterface": true,
                "journal": true,
                "storageEngine": "wiredTiger"
            },
            "rsParams": {
                "priority": 99,
                "tags": {
                    "ordinal": "one",
                    "dc": "ny"
                }
            }
        },
        {
            "procParams": {
                "ipv6": true,
                "nohttpinterface": true,
                "journal": true,
                "storageEngine": "wiredTiger"
            },
            "rsParams": {
                "priority": 1.1,
                "tags": {
                    "ordinal": "two",
                    "dc": "pa"
                }
            }
        },
        {
            "procParams": {
                "ipv6": true,
                "nohttpinterface": true,
                "journal": true,
                "storageEngine": "wiredTiger"
            },
            "rsParams": {
                "arbiterOnly": true
            }
        }
    ]
}

Make all servers in wiredTiger replica set preset use the wiredTiger storage engine.
Make all servers in wiredTiger replica set preset use the wiredTiger storage engine.
