Elasticsearch & Redis

-

 Elasticsearch vs Redis: What are the differences?

Developers describe Elasticsearch as "Open Source, Distributed, RESTful Search Engine". Elasticsearch is a distributed, RESTful search and analytics engine capable of storing data and searching it in near real time. Elasticsearch, Kibana, Beats and Logstash are the Elastic Stack (sometimes called the ELK Stack). On the other hand, Redis is detailed as "An in-memory database that persists on disk". Redis is an open source, BSD licensed, advanced key-value store. It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets and sorted sets.

Elasticsearch can be classified as a tool in the "Search as a Service" category, while Redis is grouped under "In-Memory Databases".

"Powerful api", "Great search engine" and "Open source" are the key factors why developers consider Elasticsearch; whereas "Performance", "Super fast" and "Ease of use " are the primary reasons why Redis is favored.

Elasticsearch and Redis are both open source tools. It seems that Elasticsearch with 42.4K GitHub stars and 14.2K forks on GitHub has more adoption than Redis with 37.4K GitHub stars and 14.4K GitHub forks.

Airbnb, Uber Technologies, and Instagram are some of the popular companies that use Redis, whereas Elasticsearch is used by Uber Technologies, Instacart, and Slack. Redis has a broader approval, being mentioned in 3265 company stacks & 1788 developers stacks; compared to Elasticsearch, which is listed in 2003 company stacks and 979 developer stacks.


Introduction to Redis. In this tutorial we are going to learn… | by Kasun Dissanayake | Medium


Spring Data Redis 

https://www.youtube.com/watch?v=oRGqCz8OLcM

https://www.youtube.com/watch?v=vpe4aDu5ixI

https://www.youtube.com/watch?v=WL6dgIODj9Y


Comments

Post a Comment

Popular posts from this blog

Hibernate (Java) -- by jps sasadara

-
Image
HQL & JPAQuery for Springboot =>   https://drive.google.com/drive/u/1/folders/18KA0A0EKYmn6Z7auazNquPDaweqPQvHI               https://www.baeldung.com/jpa-join-types   (only if we want to write join query, but in HQL no need of using join  key word , if we can correctly implement the mapping classes ) Native SQL for Springboot => https://drive.google.com/drive/u/1/folders/17vdDhEXBKtbWpTkYUy5UcF_n_r2G-YDy      projects =>  https://drive.google.com/drive/folders/14x_9TeE5SZq6ECZqCmoBaGTgOUSssuqm?usp=sharing We can write plan SQL Query in hibernate using   session.createSQLQuery(sqlSearch); Eg-::  String sqlSearch = SQLVarList.MSSQL_DEVICEOPERATIONREPORT_SQL2 + where + orderBy;             Query querySearch = session.createSQLQuery(sqlSearch);             querySearch = setD...
Read more

Observer Design Pattern & RxJava & @Async

-
Image
  Observer Design Pattern According to GoF definition,  observer pattern  defines a one-to-many dependency between objects so that when one object changes state, all its dependents are notified and updated automatically. It is also referred to as the  publish-subscribe pattern . In observer pattern, there are many observers (subscriber objects) that are observing a particular subject (publisher object). Observers register themselves to a subject to get a notification when there is a change made inside that subject. A observer object can register or unregister from subject at any point of time. It helps is making the objects objects  loosely coupled . 1. When to use observer design pattern As described above, when you have a design a system where multiple entities are interested in any possible update to some particular second entity object, we can use the observer pattern The flow is very simple to understand. Application creates the concrete subject object. All...
Read more

JAVA uml Based cording <<< by jps sasadara >>>

-
                             COMPOSITION TUTORIAL The term  composition  is not unique to Java, composition is a concept of object-oriented programming. By now you should be familiar with the concept of  inheritance  - inheritance requires the use of the Java keywords  extends  or  implements . When your class inherits members from either a superclass or a superinterface, you can directly invoke or access those members. Consider the following code that demonstrates inheritance: class OperatingSystem {      void bootUp() { ... }      void shutDown() { ... } } class Computer extends OperatingSystem { } class TestMe {      public static void main(String args[]){          Computer c = new Computer();          c.bootUp();  ...
Read more