{
    "backend": "mongodb",
    "mongodb": {
        "server":"",
        "database":"wikibase"
    },
    "cache": {
    	"lifetime": 86400,
        "array": true,
        "memcached": true
    },
    "options": {
        "languages": ["en", "fr"],
        "mongodb-query-time-limit": 5000
    }
}

{
    "backend": "mongodb",
    "mongodb": {
        "server":"mongodb://localhost:27027",
        "database":"wikibase"
    },
    "cache": {
    	"lifetime": 86400,
        "array": true,
        "memcached": true
    },
    "options": {
        "languages": ["en", "fr"],
        "mongodb-query-time-limit": 5000
    }
}

Update MongoDB config to use the standalone MongoDB 3
Update MongoDB config to use the standalone MongoDB 3