分库分表算法

主要采用Hash，代码如下：

        static void Main(string[] args)
        {
            string s = DateTime.Now.ToString("yyyMMddHHmmssfff");
            string orderNo = $"Hash{s}001";
            int tableSize = 32;

            SHA1 sha = new SHA1CryptoServiceProvider();
            byte[] bytes = sha.ComputeHash(System.Text.Encoding.UTF8.GetBytes(orderNo));
            long l = BitConverter.ToUInt32(bytes);

            Console.WriteLine(orderNo);
            Console.WriteLine(l);
            Console.WriteLine(l % tableSize);
            Console.ReadKey();
        }