apache-kafka - 什么是 Kafka 消息调整？

Question

来自 https://data-flair.training/blogs/advantages-and-disadvantages-of-kafka/ :

As we know, the broker uses certain system calls to deliver messages to the consumer. However, Kafka’s performance reduces significantly if the message needs some tweaking. So, it can perform quite well if the message is unchanged because it uses the capabilities of the system.

如何调整消息？如果我想证明可以调整消息，我必须做什么？

Answer 1

此声明中提到了对 Kafka 性能的怀疑:

怀疑:

Kafka’s performance reduces significantly if the message needs some tweaking. So, it can perform quite well if the message is unchanged

澄清:

As a user of Kafka for several years, I found Kafka's guarantee, that a message cannot be altered when it is inside a queue, to be one of its best features.

Kafka 不允许消费者直接更改队列(主题)中的动态消息。

消息内容可以在发布到主题之前更改，也可以在仅从主题使用之后更改。

需要修改消息的业务需求可以使用多个主题来实现，在这个模式中:

(message) --> Topic 1 --> (consume & modify message) --> Topic 2

使用多个主题来实现消息修改功能只会 增加存储需求 .它不会对性能产生任何影响。

Kafka 不允许在飞行中修改消息的设计提供 '数据完整性' .这是 Kafka 在金融处理应用程序中广泛使用的驱动因素之一。