Medium

Haydar Külekci

Haydar Külekci

·

May 3

Understanding Qdrant’s Optimizer

If you’ve ever watched the Qdrant Web UI while a large ingestion was running, you’ve probably seen segments flickering between yellow…

Understanding Qdrant’s Optimizer

In

Leber’s Congenital Amaurosis (GUCY2D)

by

Haydar Külekci

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Mar 15

How I Turned a 2D Periodic Table Into a 3D Tactile Learning Tool

I have started working on 3D printing designs that were originally drawn in 2D and planned to be printed with a plotter, and I wanted to…

How I Turned a 2D Periodic Table Into a 3D Tactile Learning Tool

Haydar Külekci

·

Feb 25

Multi-Tenant Vector Search in Practice: Building a Shared Knowledge Base with Qdrant

This is Part 2. In Part 1, we explored why spinning up a new collection per tenant is usually a bad idea and when it actually makes sense…

Multi-Tenant Vector Search in Practice: Building a Shared Knowledge Base with Qdrant

In

Leber’s Congenital Amaurosis (GUCY2D)

by

Haydar Külekci

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Feb 8

3D Printable Educational Materials for Low Vision & Blind Children

Taking a step back from my usual work on search and relevance data processing, I’ve been exploring ways to improve the educational…

3D Printable Educational Materials for Low Vision & Blind Children

Haydar Külekci

·

Feb 2

Why More Collections Might Be Killing Your Qdrant Cluster

To read this story for free, click here.

Why More Collections Might Be Killing Your Qdrant Cluster

In

Motivolog

by

Haydar Külekci

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Jan 14

Qdrant as System Service on Ubuntu

When deploying Qdrant for production use, you could encounter installations that aren’t configured to run as a system service by default…

Qdrant as System Service on Ubuntu

In

Motivolog

by

Haydar Külekci

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Jan 5

Solving Qdrant "No File Descriptors Available" Error

If you encounter the following errors in Qdrant while creating collections or indexing data:

Solving Qdrant "No File Descriptors Available" Error

In

Motivolog

by

Haydar Külekci

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Jan 5

Why Precision and Recall Matter More Than Ever in Agentic Systems

With agentic solutions, understanding relevance techniques has become more critical than ever. Let me explain why with a simple example…

Why Precision and Recall Matter More Than Ever in Agentic Systems

In

Motivolog

by

Haydar Külekci

·

Dec 18, 2025

How Facets Work in Qdrant: An Under-the-Hood Peek

I’ve been using Qdrant for a couple of projects recently, and one of the features that really caught my attention is Facets. I decided to…

How Facets Work in Qdrant: An Under-the-Hood Peek

In

Motivolog

by

Haydar Külekci

·

Dec 2, 2025

Understanding Elasticsearch’s include_defaults Parameter: A Deep Dive

When managing Elasticsearch or OpenSearch clusters, understanding your configuration is crucial for troubleshooting, optimization, and…

Understanding Elasticsearch’s include_defaults Parameter: A Deep Dive

Haydar Külekci

Haydar Külekci

Elastic Certified Engineer - Open to new opportunities & seeking sponsorship for UK/Netherland relocation 🇳🇱🇬🇧 https://www.linkedin.com/in/hkulekci/

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