zookeeper hadoop

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Zab: The Atomic broadcast protocol of zookeeper ensures that messages sent to copies are in the same order. Zookeeper uses a protocol called Zab (zookeeperatomic broadcast) as the core of its consistent replication. It features high throughput, low latency, robustness, and simplicity, but does not require its scalability. The implementation of zookeeper is co

3, hive installation configuration3.1install MySQLInstalling MySQL on the datanode5# yum-y Installmysql-server MySQL# MySQLMysql> Grant all privileges on * * [email protected] ' 10.40.214.% ' identified by ' hive ';mysql> flush Privileges;3.2Installing Hive# tar-zxf Apache-hive-0.13.1-bin.tar.gz-c/var/data/; Mv/var/data/apache-hive-0.13.1/var/data/hive# cd/var/data/hive# vimbin/hive-config.sh # # Add the following at the beginning of the scriptExportjava_home=/usr/java/jdk1.7.0_71Exporthive_home

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Zookeeper installation 1 download and decompress CD/usr/local/src Wget http://mirror.bit.edu.cn/apache/zookeeper/zookeeper-3.4.5/zookeeper-3.4.5.tar.gz Tar zxvf zookeeper-3.4.5.tar.gz 2 Configuration CD zookeeper-3.4.5 Cp co

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Zookeeper to ensure synchronization between servers, the protocol that implements synchronization is the Zab protocol. There are two modes of this Protocol: Recovery mode (select Master) and broadcast mode (synchronous).Enter recovery mode when the service starts or leader crashes. After the election is successful and most servers have finished synchronizing with the leader state (N+1 in 2n+1), the recovery mode is over.State synchronization ensures t

sessions life cycle ends. Temporary nodes also play a very important role in some situations. --------------------------- Zookeeper Series III: Installation of Zookeeper The installation mode of zookeeper is divided into three kinds: stand-alone mode (stand-alone), cluster mode and cluster pseudo distribution mode. Zook