async public Task<bool> SetAsync(string key, object value, int expireSeconds = -1, RedisExistence? exists = null)
{
    object redisValule = this.SerializeRedisValueInternal(value);
    if (expireSeconds <= 0 && exists == null) return await ExecuteScalarAsync(key, (c, k) => c.Value.SetAsync(k, redisValule)) == "OK";
    if (expireSeconds <= 0 && exists != null) return await ExecuteScalarAsync(key, (c, k) => c.Value.SetAsync(k, redisValule, null, exists)) == "OK";
    if (expireSeconds > 0 && exists == null) return await ExecuteScalarAsync(key, (c, k) => c.Value.SetAsync(k, redisValule, expireSeconds, null)) == "OK";
    if (expireSeconds > 0 && exists != null) return await ExecuteScalarAsync(key, (c, k) => c.Value.SetAsync(k, redisValule, expireSeconds, exists)) == "OK";
    return false;
}
async public Task<bool> SetAsync(string key, object value, TimeSpan expire, RedisExistence? exists = null)
{
    object redisValule = this.SerializeRedisValueInternal(value);
    if (expire <= TimeSpan.Zero && exists == null) return await ExecuteScalar(key, (c, k) => c.Value.SetAsync(k, redisValule)) == "OK";
    if (expire <= TimeSpan.Zero && exists != null) return await ExecuteScalar(key, (c, k) => c.Value.SetAsync(k, redisValule, null, exists)) == "OK";
    if (expire > TimeSpan.Zero && exists == null) return await ExecuteScalar(key, (c, k) => c.Value.SetAsync(k, redisValule, expire, null)) == "OK";
    if (expire > TimeSpan.Zero && exists != null) return await ExecuteScalar(key, (c, k) => c.Value.SetAsync(k, redisValule, expire, exists)) == "OK";
    return false;
}

 T GetAndExecute<T>(RedisClientPool pool, Func<Object<RedisClient>, T> handler, int jump = 100, int errtimes = 0)
        {
            Object<RedisClient> obj = null;
            Exception ex = null;
            var redirect = ParseClusterRedirect(null);
            try
            {
                obj = pool.Get();
                while (true)
                { //因网络出错重试，默认1次
                    try
                    {
                        var ret = handler(obj);
                        return ret;
                    }
                    catch (RedisException ex3)
                    {
                        redirect = ParseClusterRedirect(ex3); //官方集群跳转
                        if (redirect == null || jump <= 0)
                        {
                            ex = ex3;
                            if (SentinelManager != null && ex.Message.Contains("READONLY"))
                            { //哨兵轮询
                                if (pool.SetUnavailable(ex) == true)
                                    BackgroundGetSentinelMasterValue();
                            }
                            throw ex;
                        }
                        break;
                    }