HFile structure in HBASE

HFile structure in HBASE order since: 2021 April 14, 2002 22:45 auth: Hadi Hfile The Hbase data has HDFS in the form of HFile, and the following is the data storage logic structure of HBase: NameSpace > Table > Region > CF > HFile HFile is: Hfile > Trailer > Load-on-open > bloom Index > Block DUTF-8...

Posted by Paul15679 on Tue, 18 May 2021 02:44:17 +0930

Basic command of Hbase

3. Basic command hbase shell Enter hbase shell command in the terminal to enter hbase command line. hbase shell 1. Enter the help command to view the help document hbase(main):000:0> help hbase(main):000:0> help 'Group name' practice: help 'ddl' help 'dml' help 'namespace' 2. Input the list comUTF-8...

Posted by mk1200 on Tue, 15 Jun 2021 06:04:39 +0930

Hbase source code analysis MovedRegionsCleaner worker thread 2021SC@SDUSC

preface This article mainly analyzes the MovedRegionsCleaner worker thread on HRegionServer MovedRegionsCleaner What is MovedRegionsCleaner? Let's take a look at its definition on HRegionServer: it is a periodic cleaning worker thread of the moved Region list on HRegionServer. /** * Chore to cUTF-8...

Posted by s1akr on Thu, 09 Dec 2021 20:41:36 +1030

National big data skills competition for college students (data warehouse deployment)

Catalogue of series articles National big data skills competition for college students (Hadoop cluster construction) preface This blog will deploy several warehouses according to the data of the National College Students' big data skills competition in previous years and this year's training, aUTF-8...

Posted by Btown2 on Sun, 26 Dec 2021 20:14:36 +1030

Big data learning tutorial SD version Part 16 [Hbase]

Hbase column database Distributed scalable massive data storage based on HDFS K-V storage is more like multidimensional Map and sparse storage The bottom layer is full of bytecode storage, so there is no type of data Data analysis cannot be done by itself 1. Introduction to HBase Logical structUTF-8...

Posted by Andrei on Fri, 07 Jan 2022 18:53:14 +1030

Java code development of HBase (starting from the establishment of Linux Cluster Environment)

Java code development of HBase (starting from the establishment of Linux Cluster Environment) Please read the following terms carefully. If you disagree with any of the terms of this statement, you can choose not to read this article. The user's reading of this article will be deemed as the appUTF-8...

Posted by tranzparency on Wed, 12 Jan 2022 11:21:55 +1030

Caused by: java.io.IOException: On-disk size without header provided is 6, but block header contains

preface The error information of this film is detailed. Please be patient to check it. Source of problem: I wrote a spark program to call hbase's API interface for scan to obtain data. At first, batch data can be exported normally, but when a batch is processed, the following errors will appeaUTF-8...

Posted by wakerider017 on Mon, 24 Jan 2022 07:46:29 +1030

User Portrait-1: mass data import into HBase

There are three methods commonly used in data import into HBase: sqoop, HBase importtsv and HBase bulkload. These three methods have their own advantages and disadvantages. The advantages and disadvantages of these three schemes will be introduced one by one below 1. Sqoop direct import have acUTF-8...

Posted by iamatube on Fri, 28 Jan 2022 12:33:20 +1030

Basic principle of Hadoop and map reduce system

Distributed file system HDFS 1, Test the installed hadoop cluster 1. Create two files in the same level directory input of hadoop2. Copy the two files to the in directory under the hadoop directory (note that this in directory is not the actual linux directory) bin/hadoop dfs -put ../input in 3UTF-8...

Posted by acemods on Mon, 31 Jan 2022 12:00:16 +1030

IDEA2020 modify flume source code and recompile to generate jar package

When configuring the flume configuration file in big data operation, we will encounter the situation that the data is distributed to hbase and hbase sink is configured. The corresponding class of serializer will be configured in the configuration. This requires us to modify the flume source codUTF-8...

Posted by robos99 on Thu, 10 Feb 2022 22:44:54 +1030