greenplum

Cloud computing projects such as Greenplum,openstack require Cluster Server deployment, and time between servers needs to be synchronized, but not all machines canDirectly connected to the network, this can be solved with chrony tools.The workaround is to set one of them as a time server, and then synchronize the other servers with this time server.I. Configuring a TIME serverSelect a server with IP as 10.168.10.10First install the Chrony tool (Ubuntu

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of the cost function. The computation of the gradient and the cost function are based on the popular techniques of the neural network back and FO Rward propagation. For a large datasets of training examples, this process is computationally intensive, and a distributed platform and Framew Ork speeds the process well beyond what's possible with traditional systems.3. Distributed learning of Auto-encoder on Pivotal gpdbIn this next section, we show how to distribute the learning problem on Pi

Hadoop Big Data 0 Basic Combat Training TutorialOne, tutorial content:1,hadoop2.0yarn Comprehensible Series2,avro Data Serialization System3,chukwa Cluster Monitoring System4,flume Log Collection System5,greenplum ArchitectureThe origins of 6,hadoop7,hadoop Commercial Application case8,hbase Case Study9,hbase Programming Practice10,mapreduce Multi-language programming11,mapreduce High-order implementation12,sqoop Data Exchange ToolTwo, Video:Three:htt

will get the following information:　Query Member_delta to see if the data was added successfully:SELECT * from Member_delta;Summarize:Writing This example today, though, is a simple example, but probably lets me know what the process of gpload execution is. Write this script also toss a lot of time, the key no one to teach you, from beginning to end are their own in groping, do not understand Baidu, do not understand the book, a word in order to write this program unscrupulous to carry out vari

in the local database. The SQL statement is as follows: Select * from scott. tb_test @ to_bylw; 2. The second method for creating a dblink is that the remote database to be accessed is not configured in the tnsnames. ora file of the local database. Create database link to_testConnect to scott identified by tigerUsing '(DESCRIPTION =(ADDRESS_LIST =(ADDRESS = (PROTOCOL = TCP) (HOST = 192.168.1.5) (PORT = 1521 )))(CONNECT_DATA =(SERVER = DEDICATED)(SERVICE_NAME = bylw)))'; The second is to put the

Label: style blog HTTP Java Ar data 2014 SP LogHadoop Big Data zero-basic high-end practical training series with text mining projectIn the big data hadoop video tutorial, the basic java syntax, database, and Linux are used to go deep into all the knowledge required by hadoop big data technology and design all common components in the hadoop ecosystem, including but not limited: greenplum database, hbase, hive, pig, Zookeeper, chukwa, hadoop 2.0 archi

increased. This is not necessarily correct for SQL queries.Over time, the differences between relational databases and mapreduce become less and less obvious. Many databases (such as ASTER data and greenplum data) have borrowed some mapreduce ideas. On the other hand, the mapreduce-based high-level query language makes the mapreduce system more acceptable than traditional relational databases.1.3.2.grid compuing Grid ComputingWhen the data volume is

Cancel or interrupt a user's session that has been too long or has SQL problems in GP. If a Super User cannot perform this operation. First, we create two users T1 and T2, and use T1 to log on to the database. [[emailprotected] ~]$ psql gtlionspsql (8.2.15)Type "help" for help. gtlions=# select version(); version ------------------------------------------

, you will naturally think of using the distributed technology. Combining the above conclusions, it may be a good choice to use a distributed database, then it is completely transparent to end users. This is indeed an ideal situation, but the reality is often cruel. First of all, implementing a perfect Distributed Database (subject to the CAP principle) is a very complicated problem. Therefore, there are not so many open-source good things to use here, just like a single-host database, there are

Dblink is used to perform regular synchronization from Oracle to oracle. A synchronization just made on the card center is used as an example. Recommended reading: Use Oracle DBLink for table Synchronization Use Oracle DBLink Oracle accesses GreenPlum through DBLink ORA-01017/ORA-02063 DBLink build Error Problem Analysis and Solution Oracle create DBLink error: ORA-01017, ORA-02063 1. Create the database to be connected to by dblink (this is not requi

:00:03 | DBLIN ~ | R-> S |Bytes -----------------------------------------------------------------------------------------------------Remote SQL Information (identified by operation id ):----------------------------------------------------1-SELECT/* + OPAQUE_TRANSFORM */"OWNER", "OBJECT_NAME", "SUBOBJECT_NAME", "OBJECT_ID", "DATA_OBJECT_ID "," OBJECT_TYPE "," CREATED "," LAST_DDL_TIME "," TIMESTAMP "," STATUS "," TEMPORARY "," GENERATED "," SECONDARY "," NAMESPACE "," EDITION_NAME "FROM" REMOTE_S

. Greenplum 8.2.15 and later versions 14. SQLite 3 and later versions 15. Sybase Adaptive ServerEnterprise 12.5 and later 16. Sybase SQL Anywhere 9 and later versions Appendix C Database Notes allows you to view compatibility issues and other details of your selected Database.1.2. Concepts1.2.1 Notes SymmetricDS is a Java-based application that provides a synchronization engine that acts as an agent in data synchronization (the database instance menti

133220-/+ buffers/cache: 1440484 130656324Swap: 4095992 0 4095992[root@yayundeng 3306]# cat /proc/sys/vm/overcommit_ratio 50[root@yayundeng 3306]# Total virtual memory = 132096808 * 50% + 4095992 = 70144396 kB The final result is that the buffer pool cannot exceed 70144396 kB-135196 kB = 70009200 KB = 66G. In fact, after testing, the buffer pool can only be set to 57 GB. Finally, let's look at the total virtual memory: CommitLimit: maximum available virtual memory Committed_AS: Virtu

2014 Summary :1. Decadent the first half, but let me learn to reflect on themselves and summarize the habit2. Learn common SQL optimization and report development3. Learn about new technologies in the industry (Hadoop,greenplum, Big Data, Android,ios)4. The second half learned Android knowledge, and entered into the Mobile development project team2015-Year Plan :I'm going to do three things that are important.1. I want to keep on blogging (summarize,

locations ). This deployment distribution is suitable for building enterprise-level application systems. The computing distribution is complex. The general model is composed of a scheduling server and a working server. Both serial and parallel computing exist. Generally, simple parallel computing is used in databases or custom storage models, such as greenplum distributed databases. Of course, a more powerful processing mode is a multi-pipeline proce

. July's overly simplified overall initialization loading in metadata cache will limit that it can only handle smallCubeBody (cube ). Edit this section Open source database There are also many open-source databases, most of which are relational databases, and a few of which are specially optimized for the data warehouse environment. Bizgres optimizes the data warehouse environment based on PostgreSQL, improving the analysis and query performance. Edit this section Open-source Bi suite

their distribution options. mapR also has a relationship with EMC to ship parts of its distribution with EMC Greenplum's Hadoop offering. Norris said MapR is targeting MERS who already understand what Hadoop can do and want a highly available, enterprise-ready version that they can quickly deploy and easily integrate with other big data tools and technologies through open APIs. mapR's target MERS already did the experimenting with Cloudera or

------------------------------------------------------------------------------------------------------------------------------------------------------PostgreSQL 8.2.15 (Greenplum Database 4.2.7.3 build 1) on x86_64-unknown-linux-gnu, compiled by GCC gcc (GCC) 4.4.2 compiled on May 7 2014 14:31:08(1 row)gtlions=# select a.schemaname, pg_size_pretty(pg_total_relation_size(a.schemaname||'.'||a.tablename)) from pg_tables a where a.tablename not in (select

Previously did not pay attention to this command, until one time in the unit installed Greenplum, in the absence of configuration system parameters, there is insufficient equipment space error message.Of course, the installation is not my native, but the public server, editing and modifying system parameters, still error, the modified system parameters did not play an effect, the Internet a check, need reboot.This server a lot of people are in use, ca