elasticsearch 2.0.0 beta1 发布，主要更新内容如下：
Pipeline Aggregations which allow you to run aggregations on the results of other aggregations, including derivatives, moving averages, and Holt Winters predictive algorithms.
Better store compression to fit more data into your disks and file system cache.
Better heap usage with doc-values-by-default, reduced memory usage during merges, and roaring bitsets for filter caching.
Structured, readable, exceptions.
Optimised query execution order, auto-caching of filters, and parent-child rewritten for faster queries.
More reliance on feedback loops instead of settings for auto-regulation.
Writes to transaction logs are atomic and durable by default.
A big cleanup to type mappings to make them safe, unambiguous, and reliable.
Binding only to localhost by default.
Cluster state diffs for faster change propagation.
Elastic Search 是一个基于Lucene构建的开源，分布式，RESTful搜索引擎。设计用于云计算中，能够达到实时搜索，稳定，可靠，快速，安装使用方便。支持通过HTTP使用JSON进行数据索引。
ElasticSearch 提供多种语言的客户端 API：
Java API -- 1.x -- other versions
JavaScript API -- 2.4 -- other versions
Groovy API -- 1.x -- other versions
.NET API
PHP API -- 1.0 -- other versions
Perl API
Python API
Ruby API
软件详情：https://www.elastic.co/downloads/past-releases/elasticsearch-2-0-0-beta1
下载地址：https://github.com/elastic/elasticsearch/releases/tag/v2.0.0-beta1
来自:开源中国社区
