Elasticsearch Migration & Upgrade
Moving to Elasticsearch from MySQL/Solr, or upgrading ES versions with breaking mapping changes — I handle the reindex, the mapping changes and the cutover so search stays available.
What I Can Help With
Migrate to or upgrade Elasticsearch with minimal downtime.
Typical Problems
Relevant Experience
Migrated Cenoskop's Elasticsearch from version 7.x to 8.x with breaking mapping changes — used reindex-from-remote into a new index, validated data, and cut over with aliases. Zero downtime during the migration.
What Is Included
How It Works
We plan the cutover with aliases, reindex into the new target, validate, and switch traffic. From €1,500.
Starting from €1,500
Migration/upgrade for one primary index.
Frequently Asked Questions
Can you reindex without downtime?
Yes, using reindex-from-remote into a new index and cut over with an alias — traffic keeps serving during the move.
Related Services
Custom Elasticsearch Development
Implement Elasticsearch for search, analytics and indexing.
Elasticsearch Optimization
Optimize Elasticsearch queries, mappings, indices and cluster configuration.
Systems I've Built
Cenoskop / Levnobot
Crawler monitoring millions of products. Processing 30M products daily and comparing them.
Built and maintain the full crawling pipeline — from scraping through Elasticsearch indexing to price comparison.
Niftycent
Price intelligence engine for the US market. Processing large-scale product data.
Built the data pipeline and crawling infrastructure for large-scale US product monitoring.
facha.sk
Find a job or offer your services.
Built the Go backend — API, matching logic and deployment.
AnalyticsForWebsite
Custom solution for collecting and evaluating traffic metrics with emphasis on processing speed and minimizing backend load.
Designed and built the backend for fast traffic metric collection and evaluation.
Not sure what's wrong?
Write what's happening and paste anything relevant — errors, logs, metrics. I'll have a look and tell you what I think.