OpenSearch ML reranking with AWS Personalize Service


Hi, Recently I had an opportunity to make a practical research around AWS Personalize Service. My main goal was to test Personalized-Ranking recipe and to verify how it works in pair with rather fresh AWS feature – OpenSearch Personalize ranking plugin. I had to verify if is possible to bring our existing search system at new level with ML personalizing features. The main thing that I was...

How to secure web application with AWS WAF and CloudWatch


Udemy Coupon: CYBERSECURITYAPRIL – active 15.04.2024-20.04.2024; in case coupons are already expired, please check that page regularly – new one will appear soon ENROLL AT Cyber Security course Hi, my name is Sergii and I am glad to represent my course “DevSecOps: How to secure web application with AWS WAF and CloudWatch”. The course stars from creating a small API application, built...

AWS devops: ElasticSearch at AWS with terraform and ansible


Udemy Coupon: AWSDEVOPSAPRIL – active 15.04.2024-20.04.2024 in case coupons are already expired, please check that page regularly – new one will appear soon; ENROLL AT AWS devops course Are you interested in docker orchestration? Would you like to uncover deep insights and pitfalls of AWS? Do you want to see the real power of Terraform and Ansible at real commercial examples? Or maybe you...

AWS OpenSearch Benchmarks – Part 1


Hi, DevOps fans Recently, 04.12.2023-05.12.2023. I have a pleasant occasion to perform AWS OpenSearch service performance benchmarks. The reason for that has a rather long story, but I will try to shorten it as much as possible. There is one application that uses Elasticsearch for performing different search operations. I will call it “Search App” below in text. Current application was migrated...

Elasticsearch indexing secrets or how to speed up indexing


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


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


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


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...

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