Kafka Quick Start - Kafka Cluster Deployment

Kafka Quick Start (6) - Kafka Cluster Deployment I. Kafka Cluster Deployment Plan 1. Operating system selection In general, production environments should deploy Kafka clusters on Linux operating systems for the following reasons:(1) At the bottom of the Kafka client, Java selector is used. The implementation mechanism of selector on Linux is ...

Posted by colesw on Mon, 25 May 2020 11:24:58 -0700

Kafka Core API - Stream API

Kafka Stream concepts and initial high-level architecture diagrams Kafka Stream is a new Feature introduced by Apache Kafka from version 0.10 that provides streaming and analysis of data stored in Kafka.In short, Kafka Stream is a class library for stream computing, similar to Storm, Spark Streaming, Flink, but much lighter. Basic concepts of ...

Posted by Dujo on Sun, 24 May 2020 09:39:16 -0700

Instances of conversion operations for the core DStream of Spark Streaming

Conversion operation of DStream The DStream API provides the following methods related to transformation operations: Examples of transform(func) and updateStateByKey(func) methods are given below: (1), transform(func) method transform methods and similar transformWith(func) methods allow any RDD-to-RDD function to be applied on DStream and can ...

Posted by buildakicker on Sat, 23 May 2020 12:15:37 -0700

The last packet sent successfully to the server was 1 milliseconds ago.

Weird database exception: There are mainly two abnormal sections as follows 1. Connection reset The last packet successfully received from the server was 1 milliseconds ago. The last packet sent successfully to the server was 1 milliseconds ago. at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.Na ...

Posted by TFD3 on Fri, 22 May 2020 08:03:25 -0700

[teacher Zhao Qiang] use Load statement to Load data in Hive

1, Syntax description of load statement in Hive Hive Load statement will not do any conversion work when loading data, but simply copy / move the data file to the address corresponding to hive table. The syntax format is as follows: LOAD DATA [LOCAL] INPATH 'filepath' [OVERWRITE] INTO TABLE tablename \ [PARTITION (partcol1=val1, partcol2= ...

Posted by whizzykid on Thu, 21 May 2020 21:08:45 -0700

How to call SPL script in Java

[Abstract]The set solver provides JDBC driver, which is easy to embed into Java program calls. The methods are similar to executing SQL and stored procedures in Java. The structure diagram is as follows: First, deploy JDBC to Java application project. In short, put the jar package and configuration file required to load the aggregator when st ...

Posted by ronverdonk on Sun, 17 May 2020 20:27:34 -0700

Python data analyst analyzes his future, as if he sees a miserable future

Preface The text and pictures of this article are from the Internet, only for learning and communication, not for any commercial purpose. The copyright belongs to the original author. If you have any questions, please contact us in time for handling. Analysis background With the popularity of artificial intelligence and big data in recent years ...

Posted by POG1 on Sat, 09 May 2020 02:40:47 -0700

hadoop native conflict error

Problem description After the cluster upgrade, hadoop cannot load the local library normally $ hadoop checknative -a 20/05/08 14:32:11 WARN bzip2.Bzip2Factory: Failed to load/initialize native-bzip2 library system-native, will use pure-Java version 20/05/08 14:32:11 WARN zlib.ZlibFactory: Failed to load/initialize native-zlib library 20/05/08 1 ...

Posted by conker87 on Fri, 08 May 2020 07:41:16 -0700

Have you considered performance in interface oriented programming?

In normal development, most of you will follow the interface programming, which can facilitate the implementation of dependency injection, polymorphism and other small skills, but this is at the expense of performance in exchange for code flexibility. Everything has Yin and Yang. See your application scenarios for choices. 1: Background 1. Rea ...

Posted by yhingsmile on Sun, 03 May 2020 04:28:00 -0700

Hbase API create table error record for Docker container deployment cluster

Hbase API create table error record Demo method: import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.hbase.HBaseConfiguration; import org.apache.hadoop.hbase.HColumnDescriptor; import org.apache.hadoop.hbase.HTableDescriptor; import org.apache.hadoop.hbase.TableName; import org.apache.hadoop.hbase.client.Admin; import org.apa ...

Posted by fusionxn1 on Thu, 30 Apr 2020 02:57:56 -0700