摘要(Abstract)
Sahara项目旨在使用用户能够在Openstack平台上便于创建和管理Hadoop以及其他计算框架集群，实现类似AWS的EMR（Amazon Elastic MapReduce service）服务。用户只需要提供简单的参数，如版本信息、集群拓扑、节点硬件信息等，利用Sahara服务能够在数分钟时间内快速地部署Hadoop、Spark、Storm集群。Sahara还支持节点的弹性扩展，能够方便地按需增加或者减少计算节点，实现弹性数据计算服务。它特别适合开发人员或者QA在Openstack平台上快速部署大数据处理计算集群。Openstack的标准组件之一；
通过REST API和Dashboard UI界面管理集群；
支持多种数据处理计算框架，包括：
多种Hadoop厂商发行版，比如CDH等；
Apache Spark和Storm；
可插除的Hadoop安装引擎；
集成厂商的特定管理工具，如Apache Ambari and Cloudera Management Console。
支持配置模板。选择Hadoop发行版本；
选择base镜像，base镜像用于生成工作节点，base镜像或者已经预先安装了Hadoop的必要组件，或者提供可插除的可自动快速部署Hadoop的工具。base镜像可以自己制作，也可以直接下载： http://sahara-files.mirantis.com/images/upstream/liberty/
集群配置，包括集群大小、集群拓扑（配置组件角色）和一些附加参数（如堆大小、HDFS冗余份数等）；
创建集群，sahara将自动创建虚拟机、部署和配置数据分析计算框架集群；
集群管理，如增加或者删除节点；
集群销毁，用户不需要时，可以删除集群，释放所有的资源。
主题(Topic)
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