clone https://github.com/LuBu0505/redis-copy-net8.git

{
  "SourceRedisConnectionString": "<source redis name>:6380,password=<your password>,ssl=True,abortConnect=False", //Source Redis ConnectionString
  "DestRedisConnectionString": "<Destination redis name>:6380,password=<your password>,ssl=True,abortConnect=False" //Destination Redis ConnectionString
}

redis-copy-net8.exe
Parameter Description:
  --se           Required. SourceEndpoint *.redis.cache.windows.net
  --sa           Required. Source password
  --sp           (Default: 6380) Source port
  --sssl         (Default: true) Connect Source over ssl
  --de           Required. DestinationEndpoint *.redis.cache.windows.net
  --da           Required. Destination Password
  --dp           (Default: 6380) Destination port
  --dssl         (Default: true) Destination Source over ssl
  --help         Display this help screen.
  --version      Display version information.
eg:
redis-copy-net8.exe --se <xxxxxx.redis.cache.chinacloudapi.cn> --sa <******************> --de <xxxxxx.redis.cache.chinacloudapi.cn> --da <******************> 

            var infoGroup = sourcecon.BasicRetryInfo((conn) => conn.GetServer(conn.GetEndPoints()[0]).Info());
            foreach (var info in infoGroup)
            {
                if (info.Key.Equals("Memory"))
                {
                    Console.WriteLine($"==\t# {info.Key}");
                    var lists = info.ToList().Where(i => i.Key.Equals("used_memory_human") || i.Key.Equals("maxmemory_human")).ToList();
                    foreach (var list in lists)
                        Console.WriteLine($"==\t  {list.ToString()}");
                }
                if (info.Key.Equals("Keyspace"))
                {
                    Console.WriteLine($"==\t# {info.Key}");
                    foreach (var list in info.ToList())
                    {
                        long dbindex, dbkeys = 0;
                        long.TryParse(Regex.Match(list.Key, @"\d+\.*\d*").Value, out dbindex);
                        long.TryParse(list.Value.Split(new char[] { ',' })[0].Split(new char[] { '=' })[1], out dbkeys);
                        dictdbIdxKeysNum[dbindex] = dbkeys;
                        totalKeysSource += dbkeys;
                        Console.WriteLine($"==\t  {list.ToString()}");
                    }
                }
            }

 var allkeys = sourcecon.BasicRetryInfo((conn) => conn.GetServer(conn.GetEndPoints()[0]).Keys(dbindex).Skip(skipKeys).Take(takeKeys)).ToArray();
var sourcedb = sourcecon.GetConection().GetDatabase(dbindex);
 var destdb = destcon.GetConection().GetDatabase(dbindex);
 foreach (var keys in SplitKeys(allkeys))
 {
     var rbatch = sourcedb.CreateBatch();
     var ttltask = new List<Task<TimeSpan?>>();
     var dumptask = new List<Task<byte[]?>>();
     foreach (var key in keys)
     {
         ttltask.Add(rbatch.KeyTimeToLiveAsync(key));
         dumptask.Add(rbatch.KeyDumpAsync(key));
     }
     rbatch.Execute();
     var ttlResults = Task.WhenAll(ttltask).Result;
     var dumpkResults = Task.WhenAll(dumptask).Result;
     //Restore the key to destation DB.
     var destBatch = destdb.CreateBatch();
     var i = 0;
     foreach (var key in keys)
     {
         destBatch.KeyRestoreAsync(key, dumpkResults[i], ttlResults[i]);
         i++;
     }
     destBatch.Execute();
     //Random select one key to verify in Phase 3. 
     if (keys.Count() > 0)
     {
         int index = RandomNumberGenerator.GetInt32(keys.Count());
         verifiedKeys.Add((dbindex, keys.ElementAt<RedisKey>(index).ToString()));
     }
     lock (lockObject)
     {
         totalKeysCopied += keys.Count();
     }
 }

            foreach (var key in verifiedKeys)
            {
                try
                {
                    var sourdump = await sourcecon.BasicRetryInfo(async (sc) => sc.GetDatabase(key.Item1).KeyDumpAsync(key.Item2));
                    var destdump = await destcon.BasicRetryInfo(async (sc) => sc.GetDatabase(key.Item1).KeyDumpAsync(key.Item2));
                    if (!sourdump.Result.SequenceEqual(destdump.Result))
                    {
                        Console.Write($"\n");
                        Console.WriteLine($"== {key} Verify Failed");
                    }
                    else
                    {
                        Console.Write($"{key}, ");
                    }
                }
                catch (Exception ex)
                {
                    Console.BackgroundColor = ConsoleColor.Red;
                    Console.WriteLine($"=={DateTime.Now.ToLocalTime()} Verify {key} failed ({ex.Message})");
                    Console.BackgroundColor = ConsoleColor.Black;
                }
            }