greenplum hadoop

Gp_toolkit Administrative schema:the Greenplum Database includes the Gp_toolkit Schema, which collects system information Through log files and operating system commands. Can run a query against the Gp_toolkit to quickly view free disk space. Results are shown in bytes. [Gpadmin@mdw ~]$ psql-d zwcdb-u zhongwc-h 192.168.1.23-w Password for user zhongwc: Psql (8.2.15) Type ' help ' for help. zwcdb=# Select Dfhostname, Dfspace,dfdevice from Gp_toolk

labels--no-tablespaces does not restore the allocation information for a table space--use-set-session-authorization to set object ownership by using the session Authorization command instead of the alter owner commandJoin options:-H, host name or socket directory for the--host= hostname database server-P,--port= port number of the database server-U,--username= names are joined with the specified database user-W,--no-password never prompt to enter a password-W,--password mandatory password promp

Label:Environmental information:greenplum:greenplum Version: ' Postgres (greenplum Database) 4.3.8.2 build 1 'Oracle:Release 11.2.0.1.0 Production1. Oracle Client DeploymentBefore using the SQLULDR2 tool, you first need to deploy the Oracle client on the Master node of Greenplum ( hereinafter referred to as GP) because SQLULDR2 need to use shared libraries such as libclntsh.so .If you want to save the hassl

use the data type. The steps are as follows:(1) Create an extension(2) Building tables and inserting data(3) Data size Quiz(4) data range out of bounds1.2 extension of signed tinyint Compared to the data type of the signed tinyint, real life is more of a few unsigned small-range integers, such as age, seniority, family population, etc., so refer to the symbolic tinyint to construct the unsigned tinyint data type. For these non-negative data, the use of unsigned tinyint can effectively reduce th

1. Dblink Module InstallationLog in to the master node and switch to the GP user[[Email protected] ~] #su-gpadminDownload the source package and unzip it into the Dblink directory[Email protected] ~]$ wget https://ftp.postgresql.org/pub/source/v8.2.23/postgresql-8.2.23.tar.gz[[email protected ] ~]$ tar xvf postgresql-8.2.23.tar.gz [[email protected] ~]$ CD postgresql-8.2.23/contrib/dblink/Modify the makefile file to remove warning messages from compilation[Email protected] dblink]$ vi Makefile p

Some Hadoop facts that programmers must know and the Hadoop facts of programmers The programmer must know some Hadoop facts. Now, no one knows about Apache Hadoop. Doug Cutting, a Yahoo search engineer, developed this open-source software to create a distributed computer environment ...... 1:

Os:centos 7.4gp:gpdb-5.7.0 Three machinesNode1 is master hostNode2, Node3 for segment host psql login Master Operation on Node1 # su-gpadmin $ psql-d peiybdb psql (8.3.23) Type ' help ' for help. peiybdb=# \l List of Databases Name | Owner | Encoding | Access privileges -----------+---------+----------+--------------------- peiybdb | gpadmin | UTF8 | Postgres | gpadmin | UTF8 | Template0 | Gpadmin | UTF8 | =c/gpadmin

The Gp_toolkit is a functional schema for Greenplum. Contains a number of useful functions. [Gpadmin@node1 gpseg-1]$ psql-d peiybdb psql (8.3.23) Type ' help ' for help. peiybdb=# \dns+ List of schemas Name | Owner | Access Privileges | Description--------------------+---------+--------------------+--------------------------------- ----------------------------Gp_toolkit | Gpadmin | Gpadmin=uc/g

1. The overall scheduling process, execute a shell script that contains KJB execution information through the crontab timer under Linux2.xxxx_0_execute_judge conversion has two jobs, by getting a daily synchronization status value to determine whether to perform synchronization work, if the synchronization status is not met, will send an email to inform3.xxxx_a0_connect_next job contains four parallel execution jobs, Message_prepare_yes job is responsible for obtaining the sync status OK email n

Hadoop Foundation----Hadoop Combat (vi)-----HADOOP management Tools---Cloudera Manager---CDH introduction We have already learned about CDH in the last article, we will install CDH5.8 for the following study. CDH5.8 is now a relatively new version of Hadoop with more than hadoop2.0, and it already contains a number of

Chapter 2 mapreduce IntroductionAn ideal part size is usually the size of an HDFS block. The execution node of the map task and the storage node of the input data are the same node, and the hadoop performance is optimal (Data Locality optimization, avoid data transmission over the network ). Mapreduce Process summary: reads a row of data from a file, map function processing, Return key-value pairs; the system sorts the map results. If there are multi

The most comprehensive history of hadoop, hadoop The course mainly involves the technical practices of Hadoop Sqoop, Flume, and Avro. Target Audience 1. This course is suitable for students who have basic knowledge of java, have a certain understanding of databases and SQL statements, and are skilled in using linux systems. It is especially suitable for those who

1. Hadoop Java APIThe main programming language for Hadoop is Java, so the Java API is the most basic external programming interface.2. Hadoop streaming1. OverviewIt is a toolkit designed to facilitate the writing of MapReduce programs for non-Java users.Hadoop streaming is a programming tool provided by Hadoop that al

Not much to say, directly on the dry goods!GuideInstall Hadoop under winEveryone, do not underestimate win under the installation of Big data components and use played Dubbo and disconf friends, all know that in win under the installation of zookeeper is often the Disconf learning series of the entire network the most detailed latest stable disconf deployment (based on Windows7 /8/10) (detailed) Disconf Learning series of the full network of the lates

Directory structure Hadoop cluster (CDH4) practice (0) PrefaceHadoop cluster (CDH4) Practice (1) Hadoop (HDFS) buildHadoop cluster (CDH4) Practice (2) Hbasezookeeper buildHadoop cluster (CDH4) Practice (3) Hive BuildHadoop cluster (CHD4) Practice (4) Oozie build Hadoop cluster (CDH4) practice (0) Preface During my time as a beginner of

Wang Jialin's in-depth case-driven practice of cloud computing distributed Big Data hadoop in July 6-7 in Shanghai Wang Jialin Lecture 4HadoopGraphic and text training course: Build a true practiceHadoopDistributed Cluster EnvironmentHadoopThe specific solution steps are as follows: Step 1: QueryHadoopTo see the cause of the error; Step 2: Stop the cluster; Step 3: Solve the Problem Based on the reasons indicated in the log. We need to clear th

developers can't fiddle with NFS, they can easily integrate MapR's distribution with HBase, HDFS, and other Apache Hadoop components, as well as move data in and out of NFS shoshould they choose to tap a different Hadoop distribution.This last point is MAID. It means, according to MapR, that there is no greater risk for vendor lock-in with its Hadoop dis

[Hadoop] how to install Hadoop and install hadoop Hadoop is a distributed system infrastructure that allows users to develop distributed programs without understanding the details of the distributed underlying layer. Important core of Hadoop: HDFS and MapReduce. HDFS is res

This document describes how to operate a hadoop file system through experiments. Complete release directory of "cloud computing distributed Big Data hadoop hands-on" Cloud computing distributed Big Data practical technology hadoop exchange group:312494188Cloud computing practices will be released in the group every day. welcome to join us! First, let's loo

Under the Cd/home/hadoop/hadoop-2.5.2/binPerformed by the./hdfs Namenode-formatError[Email protected] bin]$/hdfs Namenode–format16/07/11 09:21:21 INFO Namenode. Namenode:startup_msg:/************************************************************Startup_msg:starting NameNodeStartup_msg:host = node1/192.168.8.11Startup_msg:args = [–format]Startup_msg:version = 2.5.2startup_msg: classpath =/usr/