哪种 ZeroMQ 模式最适合异步套接字对？

我有一个服务器（在亚马逊上运行）和一个连接到它的客户端。建立连接后，客户端和服务器仅相互通信并发送消息。

e.g.

1. Client -> Server
2. Client -> Server
3. Client <- Server
4. Client -> Server
5. Client <- Server
6. Client <- Server

客户端可能会失去连接并在一段时间后重新连接并恢复消息发送。另外，消息顺序有何影响？ #2 能在#1 之前到达吗？

要在现有答案中添加一些内容（因为它有一个要求详细说明的赞成评论），一种解决方案可能是在每个节点上设置两个套接字。这是我们使用发送消息的示例input在后台线程上监听响应时：

server.py:

import zmq
import threading

context = zmq.Context()
send_socket = context.socket(zmq.PUSH)
send_socket.bind('tcp://*:5556')

def print_incoming_messages():
    recv_socket = context.socket(zmq.PULL)
    recv_socket.bind('tcp://*:5557')
    while True:
        msg = recv_socket.recv_string()
        print(f'Message from client: {msg}')

# Print incoming messages in background
recv_thread = threading.Thread(target=print_incoming_messages)
recv_thread.start()

while True:
    msg = input('Message to send: ')
    send_socket.send_string(msg)

client.py:

import zmq
import threading

context = zmq.Context()
send_socket = context.socket(zmq.PUSH)
send_socket.connect('tcp://127.0.0.1:5557')

def print_incoming_messages():
    recv_socket = context.socket(zmq.PULL)
    recv_socket.connect('tcp://127.0.0.1:5556')
    while True:
        msg = recv_socket.recv_string()
        print(f'Message from server: {msg}')

recv_thread = threading.Thread(target=print_incoming_messages)
recv_thread.start()

while True:
    msg = input('Message to send: ')
    send_socket.send_string(msg)