Elasticsearch la mot cong cu tim kiem dua tren phan mem Lucene. No cung cap mot bo may tim kiem dang phan tan, co đay đu cong cu voi mot giao dien web HTTP co ho tro du lieu JSON. Elasticsearch đuoc phat trien bang Java va đuoc phat hanh dang nguon mo theo giay phep Apache. Elasticsearch la mot cong cu tim kiem pho bien nhat, theo sau la Apache Solr, cung dua tren Lucene.


Lich su Shay Banon tao ra phan mem tien than cua Elasticsearch, đuoc goi la Compass, trong nam 2004. Trong khi suy nghi ve phien ban thu ba cua Compass, ong nhan ra rang can thiet phai viet lai phan lon Compass đe "tao ra mot giai phap tim kiem co kha nang mo rong". Vi vay, ong đa tao ra "mot giai phap đuoc xay dung tren nguyen ly phan tan" va su dung cac giao thuc pho bien la JSON va HTTP, thich hop cho cac ngon ngu lap trinh khac, cung nhu Java. Shay Banon phat hanh phien ban đau tien cua Elasticsearch vao thang hai, nam 2010.Cong ty Elasticsearch BV đuoc thanh lap vao nam 2012 đe cung cap dich vu thuong mai va san pham xung quanh phan mem Elasticsearch va cac phan mem lien quan. Trong thang 6 nam 2014, cong ty thong bao tang 70 trieu USD trong mot vong tai tro Loat C, chi 18 thang sau khi thanh lap cong ty. Vong tai tro đa đuoc dan dat boi New Enterprise Associates (NEA). Cac nha tai tro bao gom Benchmark Capital va Index Ventures. Vong nay mang đen tong so kinh phi hon 104 trieu đo.
Vao thang nam 2015, cong ty Elasticsearch đoi ten thanh Elastic.


Tong quan Elasticsearch co the đuoc su dung đe tim kiem tat ca cac loai tai lieu. No cung co kha nang mo rong tim kiem, gan nhu tim kiem thoi gian thuc va ho tro multitenancy. Elasticsearch đuoc phan tan, co nghia la no the đuoc chia thanh manh (shard) va tung manh co the khong co nhieu ban sao (replica)... Moi nut (node) chua mot hoac nhieu manh, va hoat đong nhu mot đieu phoi vien đe quan ly hoat đong chinh xac cua cac manh. Tai can bang (rebalancing) va đinh tuyen (routing) đuoc thuc hien tu đong [...]".
Elasticsearch su dung Lucene va co gang lam moi tinh nang co san cua Lucene co the dung lai thong qua JSON va Java API. No ho tro facetting va percolating, co the co ich cho thong bao neu tai lieu moi phu hop cho truy van đang ky.
Mot tinh nang khac đuoc goi la "cong" (gateway) va xu ly cac chi so (index) lau dai kien tri, vi du, mot index co the phuc hoi đuoc tu cac cong trong truong hop tai nan o may chu. Elasticsearch ho tro yeu cau GET thoi gian thuc, lam cho no nhu mot kho du lieu dang NoSQL, nhung no thieu giao dich phan tan.


Nguoi su dung Nguoi dung đang chu y su dung Elasticsearch bao gom :

Wikimedia
athenahealth
Adobe Systems
Facebook
StumbleUpon Mozilla,
Amadeus IT Group
Quora
Foursquare
Etsy
SoundCloud
GitHub
FDA
CERN
Stack Exchange
Center for Open Science
Reverb
Netflix
Pixabay
Motili
Sophos
Slurm Workload Manager


Quan ly Dich vu Mot so to chuc cung cap Elasticsearch nhu mot dich vu quan ly, bao gom ca Amazon Web Services Elasticsearch Service, Bonsai Elastic Cloud, Qbox va Searchly. Cac dich vu nay cung cap kha nang luu tru, trien khai, sao luu va ho tro khac nhu mot goi, giam cac ky nang va thoi gian can thiet đe thuc hien va quan ly Elasticsearch. Đa so dich vu quan ly cung bao gom ca phan mem Kibana đe quan ly giao dien dang bieu đo.


Tham khao