cloudera hdfs

http://www.aboutyun.com/thread-9189-1-1.html here to the hehe. 1. Related catalogue/var/log/cloudera-scm-installer: Install log directory./var/log/*: Related log files (related services and cm)./usr/share/cmf/: Program installation directory./usr/lib64/cmf/: Agent program code./var/lib/cloudera-scm-server-db/data: Embedded Database directory./usr/bin/postgres: Embedded Database program./etc/

the page where the results are checked"Cloudera recommended setting/proc/sys/vm/swappiness to 0 when checking host correctness." The current setting is 30. "Warning, make the following settings# vi/etc/sysctl.confvm.swappiness = 0# sysctl–pWhen checking host correctness, the "enabled" transparent large page appears, which can cause significant performance issues. "Warning, make the following settingsecho never >/sys/kernel/mm/transparent_hugepage/ena

optimization Modify the/etc/security/limits.conf file to add the following: * Hard Nofile 65535* Soft Nofile 655355, SSH key to get through This is not necessary, Cloudera-manager for each node installed HDFs, Flume, hive and other applications do not rely on SSH transmission, the agent based on communication, transmission, installation files. If you want an SSH key to get through, see my other blog pos

/var/run/hdfs-sockets rm -rf /usr/lib/hadoop /usr/lib/hadoop* /usr/lib/hive /usr/lib/hbase /usr/lib/oozie /usr/lib/sqoop* /usr/lib/zookeeper /usr/lib/bigtop* /usr/lib/flume-ng /usr/lib/hcatalog rm -rf /usr/bin/hadoop* /usr/bin/zookeeper* /usr/bin/hbase* /usr/bin/hive* /usr/bin/hdfs /usr/bin/mapred /usr/bin/yarn /usr/bin/sqoop* /usr/bin/oozie rm -rf /etc/alternatives/* rm -rf /etc/hadoop* /etc/zookeeper* /e

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Java Operation HDFS Development environment constructionWe have previously described how to build hdfs pseudo-distributed environment on Linux, and also introduced some common commands in HDFs. But how do you do it at the code level? This is what is going to be covered in this section:1. First use idea to create a MAVEN project:Maven defaults to a warehouse that

This document is suitable for all versions of Cloudera Manager 5 and is upgraded using Tarballs tarballs contains Cloudera Manager server and Cloudera manageragent. Https://www.cloudera.com/documentation/enterprise/latest/topics/cm_ag_ug_cm5_tarballs.html#cm_ag_ug_cm5_tarballs In most scenarios, upgrading Cloudera Man

Use Cloudera QuickStart VM to quickly deploy Hadoop applications without Configuration Directory: Download the cloudera-vm image from the CDH website Use VirtualBox to start a VM Test and use System Environment: Oracle VM VirtualBox 64bit host.1. Download The cloudera-vm image from the CDH website Select on the website http://www.cloudera.com/content/support

customers from all walks of life.For Chinese users in the initial phase of Hadoop technology, Cloudera also takes into account the way in which the technology is interfaced with traditional data management technologies to further reduce the technical threshold. Ling that this is an important trend in big data, but also a unique advantage of Cloudera. Make Hadoop easier,

Impala is a new query system developed by cloudera. It provides SQL semantics and can query Pb-level big data stored in hadoop HDFS and hbase. Although the existing hive system also provides SQL semantics, the underlying hive execution uses the mapreduce engine and is still a batch processing process, which is difficult to satisfy the query interaction. In contrast, Impala's biggest feature is its speed. Im

the hive's metadata store, and hive does not have a MySQL driver by default and copies one via the following command:cp /opt/cm-5.3.4/share/cmf/lib/mysql-connector-java-5.1.25-bin.jar /opt/cloudera/parcels/CDH-5.3.4-1.cdh5.3.4.p0.12/lib/hive/lib/You will not encounter any problems after you continue with the installation.After a long wait, the installation of the service is complete:After the installation is complete, you can go to the cluster interf