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1. Retrieve and maintain up-to-date partition assignment - an array of node ids, where Nth element is the leader node ID for partition N.
2. Use the same logic as server HashCalculator to compute colocation key hash (see Row#colocationHash).
3. Calculate partition number as rowKeyHash % partitionCount.
4. Get node id from partition assignment (p1).
5. If a connection to the resulting node exists, perform a direct call. Otherwise, use default connection.

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