goes through the SQL engine, translating the in-memory data into SQL Tree, where the Apache calcite project is used to take part. We then respond to the SQL request of the Web Console through the Thrift protocol, and finally return the results to the front end, which is visualized with the implementation of the chart.3. Plug-in configurationHere, we need to follow calcite JSON Models, for example, for Kafka clusters, we need to configure the content:
1. Background
Recently, due to project requirements, Kafka's producer needs to be used. However, for C ++, Kafka is not officially supported.
On the official Kafka website, you can find the 0.8.x client. The client that can be used has a C-version client. Although the client is still active, there are still many code problems and the support for C ++ is not very
This article reprint please from: Http://qifuguang.me/2015/12/24/Spark-streaming-kafka actual combat course/
Overview
Kafka is a distributed publish-subscribe messaging system, which is simply a message queue, and the benefit is that the data is persisted to disk (the focus of this article is not to introduce Kafka, not much to say).
This records Kafka source code notes. (Code version is 0.8.2.1)This is not the beginning of the Kafka boot sequence. Online has been a bunch of Kafka boot sequence and frames on the article. Here is no longer wordy, the main details of the Code Details section. The details will always be read and supplemented. If you w
: Handletopicevent16, Zookeepertopiceventwatcher.scalaMonitoring the changes of each topic child node under the/brokers/topics node17, Simpleconsumer.scalaKafka the consumer of the message. It maintains a blockingchannel for sending and receiving requests/responses, so the connect and disconnect methods are also available to enable and disable the underlying blockingchannel. The core approach to defining this class includes: 1. Send, that is, sending Topicmetadatarequest and ConsumerMetadataRequ
The environment of this article is as follows:Operating system: CentOS 6 32-bitJDK version: 1.8.0_77 32-bitKafka version: 0.9.0.1 (Scala 2.11)
1. The required environmentKafka requires the following operating environments:Java Installation Reference CentOS 6 install JDK8 using RPM methodZookeeper Installation Reference: CentOS under Zookeeper standalone mode, cluster mode installation2. Download and un
Introduction
In distributed system, we widely use message middleware to exchange data between systems, and facilitate asynchronous decoupling. Now open source message middleware has a lot of time ago our own product ROCKETMQ (Metaq core) also smooth open source, get everyone's attention.
So, what is the performance of message middleware?
With this in doubt, our middleware test group performs a performance comparison of the common three types of message products (
Kafka is a distributed publish-subscribe messaging system, which is simply a message queue, and the benefit is that the data is persisted to disk (the focus of this article is not to introduce Kafka, not much to say). Kafka usage scenarios are still relatively large, such as buffer queues between asynchronous systems, and in many scenarios we will design as follo
installation path, if you change the installation directory during installation, fill in the changed path)
PATH: Add after existing value "; %java_home%\bin "
1.3 Open cmd Run "java-version" to view the current system Java version:2. Installing zookeeperThe Kafka run depends on zookeeper, so we need to install and run
Use Rsyslog to collect logs to Kafka
The project needs to collect logs for storage and analysis. The data flow is rsyslog (Collection)-> kafka (Message Queue)-> logstash (cleanup)-> es, hdfs; today, we will first collect logs to kafka using rsyslog.I. Environment preparation
Through viewing the official rsyslog documentation, we know that rsyslog supports
-3.4.6-2 program modifies the zoo.cfg configuration fileclientport=2182The third Zookeeper-3.4.6-2 program modifies the zoo.cfg configuration fileclientport=2183Create ServerIDCreate a new myID file under the configured DataDir directory, the file content is the corresponding ID number,Like what:zookeeper-3.4.6 program myID file has a content of 1Zookeeper-3.4.6-2 program myID file has a content of 2Zookeeper-3.4.6-3 program myID file has a content of 3The directory I configured here isStart Zoo
The Kafka cluster (pseudo distributed) is already deployed, and the following is built into the Java development environment.
I. Environmental description
1, Win10 Eclipse (Kepler)
2, the machine set up a virtual machine system: CentOS 6.5 ip:192.168.136.134
3, deployed on the 134 zookeeper pseudo distributed deployment 192.168.136.134:2181,192.168.136.134:2182,192.168.136.134:2183
4. Deployment of the Kafka
To demonstrate the effect of the cluster, a virtual machine (window 7) is prepared, and a single IP multi-node zookeeper cluster is built in the virtual machine (the same is true for multiple IP nodes), and Kafka is installed in both native (Win 7) and virtual machines.Pre-preparation instructions:1. Three zookeeper servers, the local installation of one as Server1, virtual machine installation two (single IP)2. Three
already in the Dc/os service library, so we can take it directly, without having to manage and maintain a Kafka cluster.Quick installation:package install --yes kafkaYou only need to run the following command to verify the status of the service.helpThe Kafka service operates as a job for marathon, allowing for long-term operation, high availability, and elastic scaling. Installing
1. Background introduction Many of the company's platforms generate a large number of logs per day (typically streaming data, for example, the search engine PV, query, etc.), the processing of these logs requires a specific log system, in general, these systems need to have the following characteristics: (1) The construction of application systems and analysis systems of the bridge, and the correlation between them decoupling (2) support for near real-time online analysis system and off-line ana
DownloadHttp://kafka.apache.org/downloads.htmlHttp://mirror.bit.edu.cn/apache/kafka/0.11.0.0/kafka_2.11-0.11.0.0.tgz[Email protected]:/usr/local/kafka_2.11-0.11.0.0/config# vim server.propertiesbroker.id=2 each node is differentlog.retention.hours=168message.max.byte=5242880default.replication.factor=2replica.fetch.max.bytes=5242880zookeeper.connect=master:2181,slave1:2181,slave2:2181Copy to another nodeNote To create the/
Build a Kafka Cluster Environment in LinuxEstablish a Kafka Cluster Environment
This article only describes how to build a Kafka cluster environment. Other related knowledge about kafka will be organized in the future.1. Preparations
Linux Server
3 (this article will create three folders on a linux server t
First, Kafka installation (Kafka_2.9.2-0.8.1.1.zip)
1. Download and unzip the installation package
TAR-XVF kafka_2.9.2-0.8.1.1.tgz or Unzip Kafka_2.9.2-0.8.1.1.zip
2. Modify the configuration file Conf/server.properties:
Broker.id=0;Host.name=xxx.xxx.xxx.xxxzookeeper.connect= xxx.xxx.xxx.xxx can be separated by commas to configure multiple
3, modify the configuration file Vim Log4j.properties (the latest version
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