Apache Cassandra static column 介绍与实战 Spark大数据博客 - https://www.iteblog.com Apache Cassandra static column 介绍与实战 假设我们有这样的场景：我们想在 Cassandra 中使用一张表记录用户基本信息（比如 email、密 码等）以及用户状态更新。我们知道，用户的基本信息一般很少会变动，但是状态会经常变化， 态会经常变化， 如果每次状态更新都把用户基本信息都加进去，势必会让费大量的存储空间。为了解决这种问题 ，Cassandra 引入了 static column。同一个 partition key 中被声明为 static 的列只有一个值的，也就是只存储一份。 如果想及时了 解Spark、Hadoop或者Hbase相关的文章，欢迎关注微信公共帐号：iteblog_hadoop 定义 static ... PRIMARY KEY ("username") 1 / 5 Apache Cassandra static column 介绍与实战 Spark大数据博客 - https://www.iteblog.com ... ); InvalidRequest:

Cassandra在饿了么的应用 主讲人：翟玉勇 时间：2017.06.11 1.Cassandra的基本原理介绍 2.为什么选择Cassandra 3.饿了么Cassandra实践 4.大数据离线平台和Cassandra的整合 概述 Cassandra历史 BigTable Dynamo Cassandra概述 Cassandra最初源自FaceBook，集合了Google BigTable面向列的特 BigTable面向列的特 性和Amazon Dynamo分布式哈希(DHT)的P2P特性于一身，具有很高 的性能、可扩展性、容错、部署简单等特点。 Cassandra架构关键字 1.Gossip 点对点通信协议，用于集群之间节点交换位置和状态信息 2.Partitioner 决定如何在集群中的节点间分发数据，也就是哪个节点放止数据的第一个replica 3.Replica Strategy 定义了复制策略用来放置replicas和路由请求所使用的拓扑信息 Gossip-节点的通信 Cassandra使用点对点通信协议Gossip在集群中的节点间交换位置和状态信息。Gossip进程 每秒运行一次，与最多3个其他节点交换信息，这样所有的节点可很快的了解集群中其他节点 信息。 1.种子节点 2.Cassandra故障探测 3.Cassandra故障恢复 Partitioner Partitioner定义了

Apache Cassandra 快速入门指南（Quick Start） Spark大数据博客 - https://www.iteblog.com Apache Cassandra 快速入门指南（Quick Start） 我们在这篇文章简单介绍了 Apache Cassandra 是什么，以及有什么值得关注的特性。本文将简单介绍 Apache Cassandra 的安装以及简单使用，可以帮助大家快速了解 的安装以及简单使用，可以帮助大家快速了解 Apache Cassandra。 我们到 Apache Cassandra 的官方网站下载最新版本的 Cassandra，在本文写作时最新版本的 Cassandra 为 3.11.4。Apache Cassandra 可以在 Linux、Unix、Mac OS 以及 Windows 上进行安装，为了简便起见，本文以 CentOS 为例进行介绍。 如果想及时了 解Spark、Had 下载、安装并启动 Cassandra 因为本文只是简单介绍 Apache Cassandra 的使用，所以本文仅安装单机版的 Cassandra，在生 产环境下应该部署成分布式模式。可以使用下面的命令下载和解压相关的压缩文件： $ wget http://mirror.bit.edu.cn/apache/cassandra/3.11.4/apache-cassandra-3.11.4-bin

Apache Cassandra™ Documentation February 16, 2012 © 2012 DataStax. All rights reserved. Apache,!Apache!Cassandra,!Apache!Hadoop,!Hadoop!and!the!eye!logo! are!trademarks!of!the!Apache!Software!Foundation Apache Cassandra 1.0 Documentation 1 Introduction to Apache Cassandra 1 Getting Started with Cassandra 1 Java Prerequisites 1 Download the Software 1 Install the Software 1 Start the Cassandra Server Server 1 Login to Cassandra 1 Create a Keyspace (database) 1 Create a Column Family 2 Insert, Update, Delete, Read Data 2 Getting Started with Cassandra and DataStax Community Edition 2 Installing a

management Task scheduler Composite tasks Cloud Explorer AWS AWS Credentials AWS SSO MongoDB Cassandra InfluxDB Redis AWS (Amazon Web Services) DynamoDB DocumentDB Keyspaces GCP (Google Cloud object IDs Working with JOINs DBeaver User Guide 21.1. Page 268 of 348. DBeaver EE supports Cassandra schema browser, data viewer and CQL queries execution. It also supports various administrative DataStax Java driver to operate with a server. It supports Cassandra servers 2.x, 3.x or higher. Cassandra Overview Connecting to Cassandra cluster DBeaver User Guide 21.1. Page 269 of 348. DBeaver

Composite tasks Sending results by e-mail Cloud Explorer AWS AWS Credentials AWS SSO MongoDB Cassandra InfluxDB Redis AWS (Amazon Web Services) DynamoDB DocumentDB Keyspaces GCP (Google Cloud object IDs Working with JOINs DBeaver User Guide 21.3. Page 301 of 381. DBeaver EE supports Cassandra schema browser, data viewer and CQL queries execution. It also supports various administrative DataStax Java driver to operate with a server. It supports Cassandra servers 2.x, 3.x or higher. Cassandra Overview Connecting to Cassandra cluster DBeaver User Guide 21.3. Page 302 of 381. DBeaver

Composite tasks Sending results by e-mail Cloud Explorer AWS AWS Credentials AWS SSO MongoDB Cassandra InfluxDB Redis AWS (Amazon Web Services) DynamoDB DocumentDB Keyspaces GCP (Google Cloud object IDs Working with JOINs DBeaver User Guide 22.0. Page 303 of 384. DBeaver EE supports Cassandra schema browser, data viewer and CQL queries execution. It also supports various administrative DataStax Java driver to operate with a server. It supports Cassandra servers 2.x, 3.x or higher. Cassandra Overview Connecting to Cassandra cluster DBeaver User Guide 22.0. Page 304 of 384. DBeaver

Composite tasks Sending results by e-mail Cloud Explorer AWS AWS Credentials AWS SSO MongoDB Cassandra InfluxDB Redis AWS (Amazon Web Services) DynamoDB DocumentDB Keyspaces GCP (Google Cloud object IDs Working with JOINs DBeaver User Guide 22.1. Page 318 of 403. DBeaver EE supports Cassandra schema browser, data viewer and CQL queries execution. It also supports various administrative DataStax Java driver to operate with a server. It supports Cassandra servers 2.x, 3.x or higher. Cassandra Overview Connecting to Cassandra cluster DBeaver User Guide 22.1. Page 319 of 403. DBeaver

results by e-mail Cloud Explorer AWS AWS Credentials AWS SSO GCP Credentials GCP SSO MongoDB Cassandra InfluxDB Redis AWS (Amazon Web Services) DynamoDB DocumentDB Keyspaces GCP (Google Cloud object IDs Working with JOINs DBeaver User Guide 22.2. Page 331 of 423. DBeaver EE supports Cassandra schema browser, data viewer and CQL queries execution. It also supports various administrative DataStax Java driver to operate with a server. It supports Cassandra servers 2.x, 3.x or higher. Cassandra Overview Connecting to Cassandra cluster DBeaver User Guide 22.2. Page 332 of 423. DBeaver

results by e-mail Cloud Explorer AWS AWS Credentials AWS SSO GCP Credentials GCP SSO MongoDB Cassandra InfluxDB Redis AWS (Amazon Web Services) DynamoDB DocumentDB Keyspaces GCP (Google Cloud object IDs Working with JOINs DBeaver User Guide 22.3. Page 336 of 425. DBeaver EE supports Cassandra schema browser, data viewer and CQL queries execution. It also supports various administrative DataStax Java driver to operate with a server. It supports Cassandra servers 2.x, 3.x or higher. Cassandra Overview Connecting to Cassandra cluster DBeaver User Guide 22.3. Page 337 of 425. DBeaver