elasticsearch concepts

ElasticSearch-Basic Concepts For articles translated by others, it is very important to master the following basic concepts for learning Elasticsearch. You can try to align the following concepts with MySQL (databases, tables, data rows, fields. Basic

the hard disk when the system is idle. The following four backend storage methods are available: 1. indexes like common Lucene indexes are stored in local file systems; 2. stored in a distributed file system, such as freeds; 3. Stored in hadoop HDFS; 4. Stored in Amazon's S3 cloud platform. It supports a variety of plug-ins. For example, the river plug-ins synchronized with MongoDB and couchdb, Word Segmentation plug-ins, hadoop plug-ins, and scripts support plug-ins. The following d

. indexing.slowlog.threshold.index.warn:10s#index. indexing.slowlog.threshold.index.info:5s#index. indexing.slowlog.threshold.index.debug:2s#index. indexing.slowlog.threshold.index.trace:500ms ################################# #垃圾回收日志记录 ################################ #monitor. jvm.gc.young.warn:1000ms#monitor. jvm.gc.young.info:700ms#monitor. jvm.gc.young.debug:400ms #monitor. jvm.gc.old.warn:10s#monitor. jvm.gc.old.info:5s#monitor. jvm.gc.old.debug:2s ################################## Safety

)By default, your original document will be stored in the _source field, which is returned when you query. This allows you to access the original object from the search results , which returns an exact JSON string that does not display any other data after the index analysis.Primary KEY (ID)The ID is a unique identifier for a file, and if no ID is provided at the time of the repository, an ID is automatically generated and the document's index/type/id must be unique.Secisland Follow-up will grad

Source: Https://goo.gl/T01ITO Basic Concepts: There are many core concepts in Elasticsearch, and mastering these concepts will be of great help to Elasticsearch's learning. Near Realtime (NRT) Elasticsearch is a near-implementation search platform. It means that he will have

, each index will have a primary shard (the original shard that created the replica) and replica shard (a copy of the primary shard). The number of Shard and replica can be customized at index creation time. After index is created, you can dynamically change the number of replica, but you cannot change the number of Shard.By default, each index is assigned 5 primary shard and one replica, which means that if you have at least two nodes in cluster, each index will have 10 Shard, 5 main shard and

/logs/elasticsearchnetwork.host: uplooking01discovery.zen.ping.multicast.enabled: falsediscovery.zen.ping.unicast.hosts: ["uplooking01", "uplooking02", "uplooking03"]Cluster status of Elasticsearch:Green： 所有的主分片和副分片都可用Yellow：所有的主分片都可以不是所有的副分片都可用Red： 不是所有的主分片和副分片都可用Elasticsearch Core Concept ClusterRepresents a cluster, there are multiple nodes in the cluster, there is a primary node, the main node can be elected, the master-slave node for the inte

Important concepts in [Elasticsearch] aggregation-Buckets (barrels) and metrics (indicators) 2015-01-04 Source: http://blog.csdn.net/dm_vincent/article/details/42387161This chapter is translated from the Aggregations-high-level Concepts chapter of the Official Elasticsearch guide.High-level concept (high-level

The previous log processing model for CDN was fromLogstash Agent==>>redis==>>logstash Index==>>elasticsearch==>>kibana3, For elasticsearch cluster construction, the index can be partitioned storage, an index can be divided into several slices, respectively, stored in the cluster, and for the load balancer inside the cluster, copy allocation, Index dynamic equalization (depending on the node's increase or de

gets the list of documents that contain the entry, in which case the document is 1 2 3 returned. Score each documenttermThe query calculates its relevance score for each matching document, which is calculated _score by taking into account the frequency of the entry (term Frequency) (the frequency of occurrences in the "quick" field of each document that matches title ), and the frequency of the rewind (inverted document Frequency) (the extent to which the "quick" fields of all documents in

execution 10. Index management Translation Links:[Elasticsearch] index management (i)[Elasticsearch] index management (ii)[Elasticsearch] index management (iii)-root object (Root objects)[Elasticsearch] index management (iv)-Dynamic mapping[Elasticsearch] index management (

, you can use the Elasticsearch aggregation feature to rely on data to perform complex business intelligence queries. For the remainder of this tutorial, you will be guided through the start and run process of Elasticsearch to get an initial understanding of it and demonstrate some basic operations such as indexing, searching, and modifying data. At the end of this tutorial, you will have a deeper understa

http://fuxiaopang.gitbooks.io/learnelasticsearch/content/(English)In Elasticsearch, document terminology is a type, and a variety of types exist in an index . You can also get some general similarities by analogy to traditional relational databases:关系数据库 ⇒ 数据库 ⇒ 表 ⇒ 行 ⇒ 列(Columns)Elasticsearch ⇒ 索引 ⇒ 类型 ⇒ 文档 ⇒ 字段(Fields)一个Elasticsearch集群可以包含多个索引（数据

Getting started with Elasticsearch, elasticsearch Elasticsearch is a highly scalable open-source full-text search and analysis engine. It can store, search, and analyze large-scale data quickly and in near real time. It is generally used as the underlying engine/technology to provide powerful support for applications with complex search functions and requirements

Elasticsearch top Course Series video tutorial-core knowledge, elasticsearch Course Http://pan.baidu.com/s/1skUv0BV Elasticsearch top master series course video tutorial-core knowledge (courseware + Source Code) -------------------------------------------------------------------- 01: course introduction. avi 02: Tell you what

First, window installation Elasticsearch installationThe client version of Elasticsearch must be consistent with the main version of the server version.1, Java Installation "slightly" 2, Elasticsearch downloadAddress: https://www.elastic.co/downloads/past-releasesSelect the appropriate version, use elasticsearch5.4.3 download zip here3, decompression

Before we talked about the Elasticsearch (search engine) operation, such as: Add, delete, change, check and other operations are used Elasticsearch language commands, like SQL command, of course Elasticsearch Official also provides a python operation Elasticsearch (search engine) interface package, just like the SQLAlc

Elasticsearch October 2014 briefing, elasticsearch1. Elasticsearch Updates 1.1 released Kibana 4 Beta 1 and Beta 1.1 Kibana 4 is different from Kibana in layout, configuration, and bottom-layer Chart Drawing. After learning the functional requirements of many communities based on Kibana 3, Kibana's self-Kibana 2 major change resulted in the second major change made by Kibana 3. Kibana has always been commit

Elasticsearch index (company) _ Centos CURL addition, deletion, and modification, elasticsearchcurlDirectory Returned Directory: http://www.cnblogs.com/hanyinglong/p/5464604.html1. Elasticsearch index description A. I have learned about the installation and configuration, basic concepts, and communication methods of Elasticse