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 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
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
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
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
[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
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With the popularity of artificial intelligence and big data in recent years ...
Posted by POG1 on Sat, 09 May 2020 02:40:47 -0700
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
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. Rea ...
Posted by yhingsmile on Sun, 03 May 2020 04:28:00 -0700
Hbase API create table error record
import org.apa ...
Posted by fusionxn1 on Thu, 30 Apr 2020 02:57:56 -0700