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client processing logic ConnectionPool netty related configurations are available in com.yahoo.pulsar.client.impl.ConnectionPool public ConnectionPool(final PulsarClientImpl client, EventLoopGroup eventLoopGroup) { this.eventLoopGroup = eventLoopGroup; this.maxConnectionsPerHosts = client.getConfiguration().getConnection ...

Blocking IO Model (Blocking I/O) The Linux kernel initially provides read and write blocking operations. When a client connects, a corresponding file descriptor (0 standard input, 1 standard output, 2 standard error output) is generated in the file descriptor directory of the corresponding process (/proc/process number/fd), such as FD 8, FD 9 ...

1. Project Background Traditional data warehouse organization structure is designed for OLAP (Online Transaction Analysis) requirements of offline data. The common way to import data is to use sqoop or spark timer jobs to import business database data into warehouses one by one.With the increasing requirement of real-time in data analysis, hou ...

1. Kafka message producer 1) Create the springboot Kafka producer demo project and import the jar package. <dependency> <groupId>org.springframework.kafka</groupId> <artifactId>spring-kafka</artifactId> <version>2.4.5.RELEASE</version> </dependency> 2) Add Kafka producer configuration it ...

Article Directory 1. Requirements 1. Requirement Description 2. Data preparation 2. Analysis 3. Technical Points 4. Join Architecture 5. Tool Class and Standard Class 1. FlinkUtilsV2 Get Tool Class for KafkaSource 2. OrderMainBean Order Master Table Class 3. OrderDetailBean Order Detail Table Clas ...

State: State refers to the intermediate calculation result or metadata attribute of the calculation node in the process of flow calculation. For example, in the process of aggregation, the intermediate aggregation result should be recorded in the state. For example, when Apache Kafka is the data sourc ...

Recently, a kafka service needs to be set up locally. It's more convenient for docker to pull an image. Record the process of setting up 1. Install virtual machine I prefer virtualbox, which gives people a very lightweight feeling. The simplest version of CentOS 7.3 installed in Linux. I used to be fond of Linux desktop, but virtual machine res ...

Learn kafka, this article takes you to the beginning. Article directory 1. Build windows integrated environment 1.1 java8 installation 1.2 zookeeper installation 1.2.1 download zookeeper 1.2.2 install and modify the zoo.cfg configuration file 1.2.3 setting the zookeeper environment variable 1.2.4 ve ...

Here is a summary of some of the more basic instructions for the kafka test I installed in the CDH. 1. Related Basic Contents Each host in the Kafka cluster runs a server called a proxy that stores messages sent to the subject and serves consumer requests. First, look at the instance information o ...

1. Preparation 1.ZooKeeper cluster installation: if you do not know about ZooKeeper installation, please click the link to learn: Installation of ZooKeeper cluster 2.Kafka cluster installation: if you do not know the installation of ZooKeeper, please click the link to learn: Installation of Kafka clus ...