Merge pull request #51 from chenryn/chapter45_part1

chapter45_part1:/500_Cluster_Admin/10_intro.asciidoc

Author: medcl

500_Cluster_Admin/10_intro.asciidoc

@@ -1,15 +1,6 @@
 
-Elasticsearch is often deployed as a cluster of nodes.((("clusters", "administration")))  A variety of
-APIs let you manage and monitor the cluster itself, rather than interact
-with the data stored within the cluster.
+Elasticsearch 经常以多节点集群的方式部署。((("clusters", "administration")))有多种 API 让你可以管理和监控集群本身，而不用和集群里存储的数据打交道。
 
-As with most functionality in Elasticsearch, there is an overarching design goal
-that tasks should be performed through an API rather than by modifying static
-configuration files.  This becomes especially important as your cluster scales.
-Even with a provisioning system (such as Puppet, Chef, and Ansible), a single HTTP API call
-is often simpler than pushing new configurations to hundreds of physical machines.
+和 Elasticsearch 里绝大多数功能一样，我们有一个总体的设计目标，即任务应该通过 API 执行，而不是通过修改静态的配置文件。这一点在你的集群扩容时尤为重要。即便通过配置管理系统（比如 Puppet，Chef 或者 Ansible），一个简单的 HTTP API 调用，也比往上百台物理设备上推送新配置文件简单多了。
 
-To that end, this chapter presents the various APIs that allow you to
-dynamically tweak, tune, and configure your cluster.  It also covers a
-host of APIs that provide statistics about the cluster itself so you can
-monitor for health and performance.
+因此，本章将介绍各种可以让你动态调整、调优和调配集群的 API。同时，还会介绍一系列提供集群自身统计数据的 API，你可以用这些接口来监控集群健康状态和性能。