Programmer Think

1. General Reprint: Idempotent real of Kafka transactional property Starting from 0.11.0, Apache Kafka supports a very large feature, that is, transactional support. In Kafka, transactional has three meanings: one is idempotent support; Second, transactional support; The third is the implementation of exactly once of Kafka Streams. In the a ...

1. What is flick flink is a flow processing framework. Usually, the usage scenario is to consume kafka data and send it to other systems after grouping and aggregation. Grouping and aggregation are the core of flink. This paper only describes a single usage scenario. Stream data is equivalent to continuous data. The log data in kafka in produc ...

Kafka Study Notes install ellipsis The installation under linux is simply NIMA outrageous zooker. Change it Just open kafka's port Methodology of Kafka operation First, understand what message queuing is. There must be sender and receiver for the transmission of information If the sender and receiver receive messages synchronously, it will ...

1: Topic Topic is the logical division of kafka messages, which can be understood as the name of a category; kafka classifies messages through topics, and different topics will be consumed by consumers subscribing to the topic. When there are so many messages in this topic that it takes a few T to save, because the messages will be saved to ...

Is kafka a single message or a batch message? How does kafka send a single message? Is kafka sending messages in order? Under what circumstances may producers frequently use GC? Message sending logic — From God's perspective, the process of message sending. Producer design Consumption sending mechanism: 1) Serializer: serialized mess ...

All data in Druid is organized into segments, which are data files, usually up to millions of rows per segment. Loading data in Druid is called ingestion and includes reading data from the source system and creating segments based on that data. In most ingestion methods, loading data is done by the MiddleManager process. Druid data is stor ...

@Override public void updateBrokerConfig(String brokerAddr, Properties properties) throws RemotingConnectException, RemotingSendRequestException, RemotingTimeoutException, UnsupportedEncodingException, InterruptedException, MQBrokerException { defaultMQAdminExtImpl.updateBrokerConfig(brokerAddr, properties); } @Override public ...

In this way, we have basically finished reading the Configuration class. This is a congestion model with a lot of content. Next, go back to NamesrvController. Under the Configuration class, the FileWatchService class is declared. From the outside, it should be a file reading service. Go in and have a look: org.apache.rocketmq.srvutil.File ...

@[TOC] (Kafka (component building springboot integration practice)) Kafka (component building springboot integration practice) 1. Application scenario 1.1 kafka scenario Kafka was originally developed by LinkedIn in Scala and based on ZooKeeper. Now it has been donated to the Apache foundation. At present, Kafka has been positioned as a dis ...

The kafka environment operation process is built on linux (CentOS7), and the schemes are docker and docker compose 1. Basic environment 1.1. yum source configuration Install source using alicloud cd /etc/yum.repos.d rename .repo .repo.bak *.repo wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo curl -O ...