Installation, running, and basic configuration of Elasticsearch

Installation, running, and basic configuration of Elasticsearch

Elasticsearch is a superb real-time distributed search and analysis engine. It can help you process large-scale data at an unprecedented speed. It can be used for full-text search, structured search, and analysis. More importantly, it is easy to get started and the api is clear. According to the official introduction, currently Wikipedia, Github and StackOverflow all use Elasticsearch for search and analysis.

Elasticsearch is based on the full-text search engine Apache Lucene. It can be said that Lucene is the most advanced and efficient fully-functional open-source search engine framework today, but Lucene is only a framework, to make full use of its functions, you need high learning costs, because Lucene is indeed very complicated. Elasticsearch uses Lucene as its internal engine and encapsulates powerful RESTful APIs. This allows you to complete search without learning the complex logic behind it ......

Install java

Elasticsearch is based on java and java needs to be installed before use. First download rpm, I downloaded the jdk-7u67-linux-x64.rpm, after the download, execute:

1. Rpm-ivh jdk-7u67-linux-x64.rpm

For more information about installation, see the official documentation.

Install Elasticsearch

Elasticsearch installation is also very simple. First download the compressed package:

1. Wget https://download.elasticsearch.org/elasticsearch/elasticsearch/elasticsearch-1.3.4.tar.gz

Decompress the package:

1. Tar-xvf elasticsearch-1.3.4.tar.gz
2. Cd elasticsearch-1.3.4

OK, it's that simple, and then you can run it directly:

1. ./Bin/elasticsearch

Then accesshttp://localhost:9200/?pretty, J, you can see a response similar to the following:

1. {
2. "Status": 200,
3. "Name": "Shrunken Bones ",
4. "Version ":{
5. "Number": "1.4.0 ",
6. "Inclue_version": "4.10"
7. },
8. "Tagline": "You Know, for Search"
9. }

Your Elasticsearch is running.

Use elasticsearch-servicewrapper

It is not enough to run Elasticsearch. We need to install Elasticsearch as a service and set it to start automatically. This requires the use of elasticsearch-servicewrapper (of course there are other methods), the installation method is still simple, download and unzip from Github, directly put the service folder inelasticsearch-1.3.4/binRun the following command to install:

1. Bin/service/elasticsearch install

Then you can start it:

1. Bin/service/elasticsearch start

Simplest Configuration

Elasticsearch is very powerful. It can run on your notebook or be deployed on thousands of servers to process petabytes of data. You can use it directly without any configuration. In addition, the default configuration of Elasticsearch is quite good. We do not recommend you modify it blindly until you fully understand the principles of Elasticsearch. Below is a simple limitation on the memory, because I encountered a problem that cannot be started when installing small memory VPS.

Since we use elasticsearch-servicewrapper to start and run Elasticsearch, it is easy to limit the memory.bin/service/elasticsearch.confFile, set it to the appropriate size:

1. Set. default. ES_HEAP_SIZE = 1024

The unit here is MB. Generally, the limit of 50% of the total memory is better, because it will be left half for Lucene.

Last

Elasticsearch provides the "getting started to proficient" guide. For more information, see here.

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ElasticSearch configuration file Translation

ElasticSearch cluster creation instance

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Working Mechanism of ElasticSearch

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ElasticSearch details: click here
ElasticSearch: click here

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