Skip to main content

Elasticsearch

 Elasticsearch is a search engine based on the Lucene library. 

It provides a distributed, multitenant-capable full-text search engine with an HTTP web interface and schema-free JSON documents. 



Elasticsearch is developed in Java and is dual-licensed under the source-available Server Side Public License and the Elastic license, while other parts fall under the proprietary Elastic License.

Shay Banon created the precursor to Elasticsearch, called Compass, in 2004.

Elasticsearch can be used to search any kind of document. 

It provides scalable search, has near real-time search, and supports multitenancy.

"Elasticsearch is distributed, which means that indices can be divided into shards and each shard can have zero or more replicas. 

Each node hosts one or more shards and acts as a coordinator to delegate operations to the correct shard(s). 

Rebalancing and routing are done automatically".

Related data is often stored in the same index, which consists of one or more primary shards, and zero or more replica shards. Once an index has been created, the number of primary shards cannot be changed.


Labels:

Comments

Post a Comment

Popular posts from this blog

Transform Ubuntu into Xubuntu

Installation 1. Open the terminal by Ctrl+Alt+T     and type    sudo apt-get install xubuntu-desktop gksu leafpad synaptic         2. Type your password & Press Enter. Now an intensive operation is being launched. Simply wait to complete the whole process. Login To Xubuntu 1. After completing the installation logout ubuntu. Note: logout not restart or shutdown. 2. In the login window click on the ubuntu logo, next to your userName & select Xubuntu Sesion 3. Enter your password and Now the Xubuntu desktop appears. :) The next thing is to clean up. Clean Up 1. Now its time to clean up, inorder to prevent system pollution problems. Note: The clean up will remove as much as possible ubuntu's desktop environment Unity. So after that you can't use Unity. 2. Open terminal by Ctrl+Alt+T and type the following  sudo apt-get remove nautilus gnome-power-manager gnome-screensaver gnome-termina*...
Post a Comment
Read more

Object serialization in java

Serialization is the conversion of an object to a series of bytes, so that the object can be easily saved to persistent storage or streamed across a communication link. The byte stream can then be deserialized - converted into a replica of the original object. When you want to serialize an object, that respective class should implement the marker interface serializable. It just informs the compiler that this java class can be serialized. You can tag properties that should not be serialized as transient. You open a stream and write the object into it. Code for serialization of a java class : Data.java package com . codetalk . serialization ; import java.io.Serializable ; public class Data implements Serializable { private static final long serialVersionUID = 1L; private String firstName ; private String lastName ; /** * @return the firstName */ public String getFirstName () { return firstName ; } /** * @param firstNam...
Post a Comment
Read more

15 Free Feature Rich Bootstrap Admin Templates

1. Charisma Charisma  comes with 9 different skins/themes to suit your style and application type. It is clean, easy to use and contains over 1000 icons and 15 plugins. It is also filled with numerous UI elements like star rating, pop over, custom tooltip, alerts, Ajax loaders, notifications and much more.  2. Siminta Siminta  comes with a large collection of plugins and UI components that help you make your work easy. All codes are self-explanatory (with comments) and the overall structure is easy to customize. It is free for personal as well as commercial use. 3. Metis Metis  is a free Twitter Bootstrap template with various layouts, components, forms, tables, maps, charts and menu level. It is also equipped with file manager, maps, error page structure, grid system and login page.  4. Hierapolis Yet another private  admin template  based on Twitter Bootstrap 3. It consists of beautiful fo...
1 comment
Read more