Latest stories

Elasticsearch indexing secrets or how to speed up indexing

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Hi, Elasticsearch fans. As probably all of you know, indexing of documents at Elasticsearch can appear to be a rather often operation. Changing fields mapping or document relationships, changing the number of shards and many other things force us to make reindexing of whole data. And when we have great amounts of data – then it appears to be a great problem. At that article we will speak...

Redis TIPS and TRICKS – how to Debug memory usage

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Hi, Recently I’ve met a problem with REDIS memory usage at AWS ElastiCache service. It appeared that after some release, that happened 2 weeks ago, memory usage started to grow gradually like a snail. As result our memory monitoring caught the problem rather late. Here is the screen for AWS CloudWatch how it looked. While analyzing release by itself, I found a lot of changes related with...

Inside Elasticsearch cluster – how it works, performance, monitoring and hardware – Part 1

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Hi, That is the beginning of article’s series devoted to the deep insides of Elasticsearch cluster. I will try to describe the most interesting and useful aspects of how Elasticsearch works, what is shards, what makes impact at performance, how to choose hardware and what parameters should be under constant monitoring. I will try to explain all as simple as possible sharing my 8...

Devops Basics

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Hi, that is a higher level post that will include different articles around DevOps basics related to my udemy course “AWS devops: ElasticSearch at AWS with terraform and ansible“, but not only that 🙂 Here I will try to discuss next aspects: DevOps basics – e.g: who is devops, how to start devops learning career path, what are devops main duties and so on Terraform basics Ansible...

Java ElasticSearch

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Hi, Current article is the introduction to the practice series of articles devoted to theme “How to work with ElasticSearch using Java and Spring Boot Framework”. You may treat it as Spring Boot ElasticSearch tutorial though you will get also additional deep knowledge at how to build search microservice from scratch, how to use programming patterns at real examples. So, lets start...

ElasticSearch Python Flask

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Hi, Current article is the introduction to the practice series of articles devoted to theme “How to work with ElasticSearch using Python and Flask framework”. You may treat it as Python ElasticSearch tutorial though you will get also additional deep knowledge at how to build search microservice from scratch, how to use programming patterns at real examples. So, lets start from task...

Symfony ElasticSearch

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Hi, Current article is the introduction to the practice series of articles devoted to theme “How to work with ElasticSearch using Symfony PHP framework”. You may treat it as Symfony ElasticSearch tutorial though you will get also additional deep knowledge at how to build search microservice from scratch, how to use programming patterns at real examples. So, lets start from task...

How to build recommendation system using ElasticSearch

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At that article we are going to speak about Recommendation Systems. And we will start from theory as always. So what does it mean at all? Recommendation System (RS) – is a subclass of information filtering system that seeks to predict the “rating” or “preference” a user would give to an item. Recommender systems are used in a variety of areas. Examples: playlist...

Elasticsearch how to build search system

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Current article is devoted to the problem of building advanced search system using ElasticSearch. We are going to create a real example of a simplified booking.com version but with some super additional features. Imagine that you are a software engineer and your boss gave you a task to build the whole backend. After analyzing all design mockups and functional requirements you have created some...

Elasticsearch basics

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Hi, that is a higher level post that will include different articles around Elasticsearch basics theme. Here I will try to discuss next aspects: elasticsearch data layer architecture; elasticsearch document oriented nature; how to work with elasticsearch using REST API and such tools as: curl package, elasticsearch head plugin, postman; how to validate and format JSON objects; base CRUD...

architecture AWS cluster cyber-security devops devops-basics docker elasticsearch flask geo high availability java machine learning opensearch php programming languages python recommendation systems search systems spring boot symfony