1. wget https://mirrors.cnnic.cn/apache/zookeeper/stable/zookeeper-3.4.12.tar.gz
tar -zxvf zookeeper-3.4.12. tar.gz Unzip
2. cd zookeeper-3.4.12
cp -rf conf/zoo_sample.cfg conf /z
Category: ZooKeeper
ZooKeeper is a distributed, open source distributed application coordination service, an open source implementation of Google’s Chubby, and an important component of Hadoop and Hbase. It is a software that provides consistent services for distributed applications. The functions provided include: configuration maintenance, domain name services, distributed synchronization, group services, etc.
Installation deployment of Zookeeper + Kafka Cluster
Preparation work Upload zookeeper-3.4.6.tar.gz, scala-2.11.4.tgz, kafka_2.9.2-0.8.1.1.tgz, slf4j-1.7.6.zip to the /usr/local directory
Unzip the zookeeper installation package
# tar -zx
ZK small knot
One ZooKeeper function 1. File system
2. Notification mechanism
Each sub-directory item is called a znode. Like the file system, we can add and delete znodes freely. Add or delete sub-z
ZooKeeper implements distributed lock safety
Background ConnectionLoss link is lost SessionExpired session expired Bypass zookeeper broker for status notification leader election Disconnect from zkNode Do idempotent Static expansion, dynamic
Consistent Hachi Distribution
hash_ring
#- *- coding: utf-8 -*-
“”” hash_ring
~~~~~~~~~~~~~
Implements consistent hashing that can be used when
the number of server nodes can increase or decrease (like in memcached) .
ZooKeeper Registry
zookeeper registration center zookeeper
zookeeper is a sub-project of Apacahe Hadoop. It is a tree-type directory service that supports change push (< span style="color: #ff0000">When the inf
ZooKeeper Basic Mechanism Principle
Znode:
1. Znode is both a path (directory) and information (file)
2, Znode has two categories: One is divided into temporary nodes (session life cycle) and permanent nodes; two are divi
ZooKeeper principle
ZookeeperIntroduction to the concept:
Zookeeperis a distributedcoordination Service; is to provide coordination services for users’ distributed applications
A, zookeeperis for other dis
ZooKeeper knowledge point
This article is reproduced from: https://www.cnblogs.com/lanqiu5ge/p/9405601.html#_label2, there will be minor adjustments.
Extended reading:
Contents
ZooKeeper is an open source
In-depth shallow PAXOS algorithm
Foreword PaxosThe algorithm is An algorithm used to solve how to agree on a certain value in a distributed system. Its degree of obscurity can completely match its importance. At present, there are