Elastic Search

Elasticsearch merupakan sebuah infrastruktur TI untuk melakukan information retrieval. Untuk melakukan instalasi Elasticsearch kita harus menginstall Java Runtime Environment (JRE) terlebih dahulu, karena Elasticsearch membutuhkan Java Virtual Machine. JRE yang digunakan bisa dari Oracle atau OpenJDK.

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1. menggunakan elastic search
3. Instalasi 0. Install JAVA 1. Download .tar.gz https://www.elastic.co/downloads/elasticsearch 2. Repositories https://www.elastic.co/guide/en/elasticsearch/refere nce/current/setup-repositories.html
4. Konfigurasi /etc/elasticsearch/: elasticsearch.yml — Configures the Elasticsearch server settings. This is where all options, except those for logging, are stored, which is why we are mostly interested in this file. logging.yml — Provides configuration for logging. In the beginning, you don't have to edit this file. You can leave all default logging options. You can find the resulting logs in /var/log/elasticsearch by default.
5. # node # cluster # shard (index.number_of_shards: 5) indexing >> #replica (index.number_of_replicas: 5) searching >>
6. # node.master true / false # node.data true / false # path.data default: /var/lib/elasticsearch nfs: /media/different_media * type category / partition * document json
7. Start elasticsearch server $ sudo service elasticsearch start $ sudo /bin/systemctl start elasticsearch.service $ bin/elasticsearch
8. Create Index curl -XPUT 'localhost:9200/customer?pretty' { "acknowledged" : true }
9. Index & Query Document curl -XPUT 'localhost:9200/customer/external/1?pretty' -d ' { "name": "John Doe" }' { "_index" : "customer", "_type" : "external", "_id" : "1", "_version" : 1, "created" : true } curl -XGET 'localhost:9200/customer/external/1?pretty' { "_index" : "customer", "_type" : "external", "_id" : "1", "_version" : 1, "found" : true, "_source" : { "name": "John Doe" } }
10. Delete Index curl -XDELETE 'localhost:9200/customer?pretty' { "acknowledged" : true }
11. Update 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 } }' curl -XPOST 'localhost:9200/customer/external/1/_update? pretty' -d ' { "script" : "ctx._source.age += 5" }'
12. Delete Document curl -XDELETE 'localhost:9200/customer/external/2?pretty'
13. Batch Processing curl -XPOST 'localhost:9200/customer/external/_bulk?pretty' -d ' {"index":{"_id":"1"}} {"name": "John Doe"} {"index":{"_id":"2"}} {"name": "Jane Doe"} ' curl -XPOST 'localhost:9200/customer/external/_bulk?pretty' -d ' {"update":{"_id":"1"}} {"doc": { "name": "John Doe becomes Jane Doe" } } {"delete":{"_id":"2"}} '
14. Search API https://www.elastic.co/guide/en/elasticsearch/reference/curr ent/search.html • Request body (sort, fields, post filter, highlighting, explain) • Suggester Query DSL https://www.elastic.co/guide/en/elasticsearch/reference/curr ent/query-dsl.html • Fuzzy term query Mapping https://www.elastic.co/guide/en/elasticsearch/reference/cur rent/mapping.html • Field boosting
15. Clients https://www.elastic.co/guide/en/elasticsearch/client/index.html • Java API [2.1] • JavaScript API • Groovy API [2.1] • .NET API • PHP API [2.0] • Perl API • Python API • Ruby API • Community Contributed Clients
16. Perbandingan • solr vs elasticsearch http://solr-vs-elasticsearch.com/ • Database vs Full text search http://www.ideaeng.com/database-full-text-search-0201