Question

我有以下代码，可以从eventhub中读取消息。但是似乎我没有收到所有消息。分区数为4，但我只使用1个阅读器。

分区0是否正确？还是我必须为每个分区添加4个接收器？

#!/usr/bin/python3
import os
import sys
import logging
import time
from azure.eventhub import EventHubClient, Receiver, Offset

logger = logging.getLogger("azure")

ADDRESS = "amqps://xxxxx.servicebus.windows.net/insights-operational-logs"

CONSUMER_GROUP = "myConsumerGrp"
OFFSET = Offset("-1")
PARTITION = "0"

total = 0
last_sn = -1
last_offset = "-1"

client = EventHubClient(ADDRESS, debug=False, username="xxxx", password="xxxx")
try:
    receiver = client.add_receiver(CONSUMER_GROUP, PARTITION, prefetch=5000, offset=OFFSET)
    client.run()
    start_time = time.time()
    for event_data in receiver.receive(timeout=100):
        last_offset = event_data.offset
        last_sn = event_data.sequence_number
        print("Received: offset {}, sn {}, (BODY LEN: {})".format(last_offset.value, last_sn, len(event_data.body_as_str())))
        print("    Body: {}".format(event_data.body_as_str()))
        print("")
        total += 1

    end_time = time.time()
    client.stop()
    run_time = end_time - start_time
    print("Received {} messages in {} seconds".format(total, run_time))

except KeyboardInterrupt:
    pass
finally:
    client.stop()

Answer 1

分区是Event Hub分配负载的方式。因此，如果为Event Hub分配了4个分区，则默认行为是发送给它的消息是在分配的分区之间轮流分配的。

您将需要使用4个读取器，或者定期从另一个分区读取一个（或多个）读取器来处理所有消息。

更多信息可在the docs

中找到

eventhub中的分区是什么？

1 个答案: