ElasticSearch 2.1.1 (1) - Getting Start

Install & Up

cd elasticsearch-2.1.1/bin

./elasticsearch

./elasticsearch --cluster.name my_cluster_name --node.name my_node_name

Cluster Health

curl 'localhost:9200/_cat/health?v'
curl 'localhost:9200/_cat/nodes?v'

List All Indices

curl 'localhost:9200/_cat/indices?v'

Create an Index

curl -XPUT 'localhost:9200/customer?pretty'

{
"acknowledged" : true
} curl 'localhost:9200/_cat/indices?v' health | index | pri | rep | docs.count | docs.deleted | store.size | pri.store.size
yellow | customer | 5 | 1 | 0 |0 | 495b | 495b

Index and Query

Index:

curl -XPUT 'localhost:9200/customer/external/1?pretty' -d '
{
"name": "John Doe”
}'

Response:

{
"_index" : "customer”,
"_type" : "external”,
"_id" : "1”,
"_version" : 1,
"created" : true
}

Query:

curl -XGET 'localhost:9200/customer/external/1?pretty'

{
"_index" : "customer",
"_type" : "external",
"_id" : "1",
"_version" : 1,
"found" : true,
"_source" :
{
"name": "John Doe"
}
}

Delete an Index

curl -XDELETE 'localhost:9200/customer?pretty'
{
"acknowledged" : true
} curl 'localhost:9200/_cat/indices?v'
health | index | pri | rep | docs.count | docs.deleted | store.size | pri.store.size

curl -X :///

Updating Document

curl -XPOST 'localhost:9200/customer/external/1/_update?pretty' -d
' { "doc": { "name": "Jane Doe" } }' curl -XPOST 'localhost:9200/customer/external/1/_update?pretty' -d
' { "doc": { "name": "Jane Doe", "age": 20 } }'

Script:

curl -XPOST 'localhost:9200/customer/external/1/_update?pretty' -d
' { "script" : "ctx._source.age += 5" }'

Error:

{
"error" : {
"root_cause" : [ {
"type" : "remote_transport_exception",
"reason" : "[Angelica Jones][127.0.0.1:9300][indices:data/write/update[s]]"
} ],
"type" : "illegal_argument_exception",
"reason" : "failed to execute script",
"caused_by" : {
"type" : "script_exception",
"reason" : "scripts of type [inline], operation [update] and lang [groovy] are disabled"
}
},
"status" : 400
}

Solution:elasticsearch.yml

script.inline: on
script.indexed: on

Deleting Documents

curl -XDELETE 'localhost:9200/customer/external/2?pretty’

The delete-by-query plugin can delete all documents matching a specific query.

Batch Processing

curl -XPOST 'localhost:9200/customer/external/_bulk?pretty' -d
'{"index":{"_id":"1”}}
{"name": "John Doe” }
{"index":{"_id":"2”}}
{"name": "Jane Doe" } ‘

Delete:

curl -XPOST 'localhost:9200/customer/external/_bulk?pretty' -d
' {"update":{"_id":"1”}}
{
"doc": { "name": "John Doe becomes Jane Doe" }
}
{"delete":{"_id":"2"}} ‘

The Search API

curl 'localhost:9200/bank/_search?q=*&pretty’
  • took –

    time in milliseconds for Elasticsearch to execute the search

  • timed_out –

    tells us if the search timed out or not

  • _shards –

    tells us how many shards were searched, as well as a count of the successful/failed searched shards

  • hits –

    search results

  • hits.total –

    total number of documents matching our search criteria

  • hits.hits –

    actual array of search results (defaults to first 10 documents)

  • _score and max_score -

    ignore these fields for now

XPOST:

curl -XPOST 'localhost:9200/bank/_search?pretty' -d ' { "query": { "match_all": {} } }'

NO CURSOR DON’T LIKE SQL

Introducing the Query Language

curl -XPOST 'localhost:9200/bank/_search?pretty' -d ' { "query": { "match_all": {} }, "size": 1 }'

curl -XPOST 'localhost:9200/bank/_search?pretty' -d ' { "query": { "match_all": {} }, "from": 10, "size": 10 }'

curl -XPOST 'localhost:9200/bank/_search?pretty' -d ' { "query": { "match_all": {} }, "sort": { "balance": { "order": "desc" } } }’

Executing Searches

Basic Query

  • Fields:

      curl -XPOST 'localhost:9200/bank/_search?pretty' -d ' { "query": { "match_all": {} }, "_source": ["account_number", "balance"] }'
  • Returns the account numbered 20:

      curl -XPOST 'localhost:9200/bank/_search?pretty' -d ' { "query": { "match": { "account_number": 20 } } }'
  • Containing the term "mill" in the address:

      curl -XPOST 'localhost:9200/bank/_search?pretty' -d ' { "query": { "match": { "address": "mill" } } }'
  • Containing the term "mill" or "lane" in the address:

      curl -XPOST 'localhost:9200/bank/_search?pretty' -d ' { "query": { "match": { "address": "mill lane" } } }'
  • Containing the phrase "mill lane" in the address:

      curl -XPOST 'localhost:9200/bank/_search?pretty' -d ' { "query": { "match_phrase": { "address": "mill lane" } } }'

Boolean Query

  • AND

      curl -XPOST 'localhost:9200/bank/_search?pretty' -d ' { "query": { "bool": { "must": [ { "match": { "address": "mill" } }, { "match": { "address": "lane" } } ] } } }'
  • OR

      curl -XPOST 'localhost:9200/bank/_search?pretty' -d ' { "query": { "bool": { "should": [ { "match": { "address": "mill" } }, { "match": { "address": "lane" } } ] } } }'
  • NOR

      curl -XPOST 'localhost:9200/bank/_search?pretty' -d ' { "query": { "bool": { "must_not": [ { "match": { "address": "mill" } }, { "match": { "address": "lane" } } ] } } }'
  • Anybody who is 40 years old but don’t live in ID(aho):

      curl -XPOST 'localhost:9200/bank/_search?pretty' -d ' { "query": { "bool": { "must": [ { "match": { "age": "40" } } ], "must_not": [ { "match": { "state": "ID" } } ] } } }'

Range Query:

curl -XPOST 'localhost:9200/bank/_search?pretty' -d ' { "query": { "bool": { "must": { "match_all": {} }, "filter": { "range": { "balance": { "gte": 20000, "lte": 30000 } } } } } }'

Executing Aggregations

Groups all the accounts by state, and then returns the top 10 (default) states sorted by count descending (also default):

curl -XPOST 'localhost:9200/bank/_search?pretty' -d '
{
"size": 0,
"aggs": {
"group_by_state": {
"terms": {
"field": "state"
}
}
}
}' SELECT state, COUNT(*) FROM bank GROUP BY state ORDER BY COUNT(*) DESC
  • Calculates the average account balance by state:

      curl -XPOST 'localhost:9200/bank/_search?pretty' -d ' { "size": 0, "aggs": { "group_by_state": { "terms": { "field": "state" }, "aggs": { "average_balance": { "avg": { "field": "balance" } } } } } }'

You can nest aggregations inside aggregations arbitrarily to extract pivoted summarizations that you require from your data.

  • Sort on the average balance in descending order:

      curl -XPOST 'localhost:9200/bank/_search?pretty' -d '
    {
    "size": 0,
    "aggs": {
    "group_by_state": {
    "terms": {
    "field": "state",
    "order": {
    "average_balance": "desc"
    }
    },
    "aggs": {
    "average_balance": {
    "avg": {
    "field": "balance"
    }
    }
    }
    }
    }
    }'
  • Group by age brackets (ages 20-29, 30-39, and 40-49), then by gender, and then finally get the average account balance, per age bracket, per gender:

curl -XPOST 'localhost:9200/bank/_search?pretty' -d '

{

"size": 0,

"aggs": {

"group_by_age": {

"range": {

"field": "age",

"ranges": [

{

"from": 20,

"to": 30

},

{

"from": 30,

"to": 40

},

{

"from": 40,

"to": 50

}

]

},

"aggs": {

"group_by_gender": {

"terms": {

"field": "gender"

},

"aggs": {

"average_balance": {

"avg": {

"field": "balance"

}

}

}

}

}

}

}

}'

Reference

https://www.elastic.co/guide/en/elasticsearch/reference/current/getting-started.html

ElasticSearch 2 (1) - Getting Start的更多相关文章

  1. Elasticsearch之java的基本操作一

    摘要   接触ElasticSearch已经有一段了.在这期间,遇到很多问题,但在最后自己的不断探索下解决了这些问题.看到网上或多或少的都有一些介绍ElasticSearch相关知识的文档,但个人觉得 ...

  2. Elasticsearch 5.0 中term 查询和match 查询的认识

    Elasticsearch 5.0 关于term query和match query的认识 一.基本情况 前言:term query和match query牵扯的东西比较多,例如分词器.mapping ...

  3. 以bank account 数据为例,认识elasticsearch query 和 filter

    Elasticsearch 查询语言(Query DSL)认识(一) 一.基本认识 查询子句的行为取决于 query context filter context 也就是执行的是查询(query)还是 ...

  4. Ubuntu 14.04中Elasticsearch集群配置

    Ubuntu 14.04中Elasticsearch集群配置 前言:本文可用于elasticsearch集群搭建参考.细分为elasticsearch.yml配置和系统配置 达到的目的:各台机器配置成 ...

  5. ElasticSearch 5学习(10)——结构化查询(包括新特性)

    之前我们所有的查询都属于命令行查询,但是不利于复杂的查询,而且一般在项目开发中不使用命令行查询方式,只有在调试测试时使用简单命令行查询,但是,如果想要善用搜索,我们必须使用请求体查询(request ...

  6. ElasticSearch 5学习(9)——映射和分析(string类型废弃)

    在ElasticSearch中,存入文档的内容类似于传统数据每个字段一样,都会有一个指定的属性,为了能够把日期字段处理成日期,把数字字段处理成数字,把字符串字段处理成字符串值,Elasticsearc ...

  7. .net Elasticsearch 学习入门笔记

    一. es安装相关1.elasticsearch安装  运行http://localhost:9200/2.head插件3.bigdesk插件安装(安装细节百度:windows elasticsear ...

  8. 自己写的数据交换工具——从Oracle到Elasticsearch

    先说说需求的背景,由于业务数据都在Oracle数据库中,想要对它进行数据的分析会非常非常慢,用传统的数据仓库-->数据集市这种方式,集市层表会非常大,查询的时候如果再做一些group的操作,一个 ...

  9. 如何在Elasticsearch中安装中文分词器(IK+pinyin)

    如果直接使用Elasticsearch的朋友在处理中文内容的搜索时,肯定会遇到很尴尬的问题--中文词语被分成了一个一个的汉字,当用Kibana作图的时候,按照term来分组,结果一个汉字被分成了一组. ...

  10. jar hell & elasticsearch ik 版本问题

    想给es 安装一个ik 的插件, 我的es 是 2.4.0, 下载了一个版本是 1.9.5, [2016-10-09 16:56:26,248][INFO ][node ] [node-2] init ...

随机推荐

  1. awk 文本处理工具

    awk: 强大的文本处理工具,擅长对日志文件进行分析: 不仅用于Linux,也是任何环境中现在的功能最强大的数据处理引擎: 语法说明: awk '{pattern + action}' {filena ...

  2. IDEA运行tomcat8.5.35源代码

    前提环境,安装和配置好java1.8+环境,maven,IDEA 1.下载Tomcat源代码:https://tomcat.apache.org/download-80.cgi#8.5.35 2.创建 ...

  3. 将Word,PDF文档转化为图片

    #region 将Word文档转化为图片 /// <summary> /// 将Word文档转化为图片 /// </summary> /// <param name=&q ...

  4. Java HashMap的死循环 以及 LRUCache的正确实现

    今天RP爆发,16核服务器load飙到30多,cpu使用情况全部99%以上. 从jstack中分析发现全部线程都堵在map.transfer处,如下: "pool-10-thread-23& ...

  5. PyQt4 对多个按钮进行同样的外观设置

    实现的效果: 正常状态下:黑底(背景色),白字(前景色),圆角,向外凸起: 鼠标停留:背景和前景都反色: 鼠标按下:背景色变为淡蓝色,向内凹陷:      class MyStyleSheet: @s ...

  6. MyBatis 接口的使用

    为了简化MyBatis的使用MyBatis的使用,MyBatis提供了接口方式自动化生成调用过程,可以大大简化MyBatis的开发 开发映射文件: <select id="queryO ...

  7. [转][Oracle]常见报错及处理

    IIS 在安装 Oracle Client 后,需要命令行执行: iisreset 1.ORA-00257 参考自:https://jingyan.baidu.com/article/f71d6037 ...

  8. Scrapy学习篇(八)之settings

    Scrapy设定(settings)提供了定制Scrapy组件的方法.你可以控制包括核心(core),插件(extension),pipeline及spider组件.设定为代码提供了提取以key-va ...

  9. [UE4]最简单的虚幻4网络游戏,使用虚幻4内置服务器

    一.设置游戏窗口合适的大小 二.在新窗口中运行游戏.玩家数量改成大于1.   三.运行游戏就会打开多个窗口 在打包完成的游戏中进行网络游戏: 一.虚幻4打包好的文件是放在WindowsNoEditor ...

  10. [UE4]使用name slot制作带背景的容器

    name slot相当于asp.net模板中的content模板. 可以往“Name Slot”里面拖放控件,如果没有“Name Slot”就不能给“BgPanel”拖放任何控件