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Day1111 Spark Task Scheduling Several key components of Spark Spark Core Concepts and characteristics of RDD Two types of RDD generation Two types of RDD operators Operator Practice partition RDD Dependency DAG: Directed Acyclic Graph Task Submission cache checkPoint Custom Sorting Custom Partiti ...

MySQL installation Download MySQL server from the official website (yum installation) wget http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm If wget is not available, download and install wget: yum -y install wget decompression rpm -ivh mysql-community-release-el7-5.noarch.rpm install yum install m ...

Hive built in function The first blog ~ ~ ~ hahaha, as a learning note, if there are narrative mistakes or other better methods, I hope you can give me some advice in the comment area! Hey hey! Query Hive built-in functions Enter hive client: [user1@master ~]$hive Query Hive built-in functions: hive ...

This paper is compiled from the IBM developer community. It mainly describes the problems of ORC and Parquet files in HDFS, and how these small files affect the reading performance of Big SQL. It also explores possible solutions to compress small files into large files using existing tools in order to improve the reading performance. brief intr ...

The data analysis process of this project is implemented in hadoop cluster, mainly using the tool of hive data warehouse. Therefore, the data collected and pretreated need to be loaded into the hive data warehouse for subsequent mining and analysis. 1. Create raw data tables Establishment of Post Sour ...

Execution and testing process: 1. Create lzo related tables: (validation process, negligible) create external table test_lzo( id int )partitioned by(`date_par` string) ROW FORMAT SERDE 'org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe' STORED AS INPUTFORMAT 'com.hadoop.mapred.DeprecatedLzo ...

Flume - Common Errors 1 Closing file failed. Will retry again in 120 seconds. 1.1 Error Reporting Phenomenon and Solution Detailed error reporting information is as follows: 09 Aug 2019 17:00:31,787 WARN [SinkRunner-PollingRunner-DefaultSinkProcessor] (org.apache.flume.sink.hdfs.BucketWriter$Close ...

demo Article directory demo demand data table create load data Diurnal activity Nissin shell script demand Create a table to store new data (partitioned tables) every day. Statistics of daily active users (daily activities) (need user's ip, user's account, user access time of the earliest url ...

0x1 Digest For the convenience of query and analysis, almost all tables in Hive offline warehouse are partitioned, most commonly by day. Flink writes data to HDFS through the following configuration. BucketingSink<Object> sink = new BucketingSink<>(path); //In this way, data cross-sky partitioning can be realized. sink.setBucketer(n ...

First, let's set up a database: create database if not exists myhive1; Use this database: use myhive1; Delete the database table student if it exists: drop table if exists student; Create a database table student and create a partition: create table student(id int, name string, sex string ,age int, department string) row format delimited fi ...