"V2Obj": {
        "ID": "KWUs8S+8RZq4Vp5TWy6KFg==",
        "DDir": "X3pDAFu8Rjyft7QD6t7W5g==",
        "EcAlgo": 1,
        "EcM": 2,
        "EcN": 2,
        "EcBSize": 10485760,
        "EcIndex": 3,
        "EcDist": [3, 4, 1, 2],
        "CSumAlgo": 1,
        "PartNums": [1],
        "PartETags": [""],
        "PartSizes": [314],
        "PartASizes": [282],
        "Size": 314,

        return int(sip.Sum64() % uint64(cardinality))
}
```

Input for the key is the object name specified in `PutObject()`, returns a unique index. This index is one of the erasure sets where the object will reside. This function is a consistent hash for a given object name i.e for a given object name the index returned is always the same.