如何优化C++大数据开发中的数据分片算法?

#include <iostream>
#include <map>
#include <string>
#include <functional>

// 定义节点的数据结构
struct Node {
    std::string name;
    size_t hash; // 节点的哈希值
    // ...
};

// 一致性哈希分片算法类
class ConsistentHashing {
public:
    ConsistentHashing() {
        // 初始化哈希环
        circle_.insert({ std::hash<std::string>()("NodeA"), Node{"NodeA", std::hash<std::string>()("NodeA")} });
        circle_.insert({ std::hash<std::string>()("NodeB"), Node{"NodeB", std::hash<std::string>()("NodeB")} });
    }

    // 查找数据所在的节点
    Node findNode(const std::string& data) {
        size_t dataHash = std::hash<std::string>()(data);
        auto it = circle_.lower_bound(dataHash);
        if (it == circle_.end()) {
            it = circle_.begin();
        }
        return it->second;
    }

    // 添加新节点
    void addNode(const std::string& nodeName) {
        size_t nodeHash = std::hash<std::string>()(nodeName);
        circle_.insert({ nodeHash, Node{nodeName, nodeHash} });
    }

    // 删除节点
    void removeNode(const std::string& nodeName) {
        size_t nodeHash = std::hash<std::string>()(nodeName);
        circle_.erase(nodeHash);
    }

private:
    std::map<size_t, Node> circle_; // 哈希环
    // ...
};

int main() {
    ConsistentHashing ch;
    ch.addNode("NodeC");
    
    std::string data1 = "Data1";
    Node node1 = ch.findNode(data1);
    std::cout << "Data1 is stored on Node " << node1.name << std::endl;

    std::string data2 = "Data2";
    Node node2 = ch.findNode(data2);
    std::cout << "Data2 is stored on Node " << node2.name << std::endl;

    ch.removeNode("NodeA");

    std::string data3 = "Data3";
    Node node3 = ch.findNode(data3);
    std::cout << "Data3 is stored on Node " << node3.name << std::endl;

    return 0;
}