Case Study: A1 Austria migrates 21TB Elasticsearch to OpenSearch with Aiven

A1 Austria Migrates 21TB Elasticsearch Workload to OpenSearch in a Week

A1 Austria, part of A1 Group, faced rising costs and operational complexity with its on-premises Elasticsearch environment, which powered key telecom analytics and Grafana dashboards. As data volumes grew, performance slowed, dashboards became harder to build, and Elasticsearch’s shift to paid licensing added further pressure. The company needed a more scalable, cost-effective alternative for its observability and analytics workloads, and turned to Aiven’s OpenSearch service through Exoscale.

Aiven, via OpenSearch by Exoscale, enabled A1 Austria to migrate a 21TB Elasticsearch workload to OpenSearch in just one week. The new 30-node cluster is managed by only two engineers, delivers faster dashboards and big-data queries at least twice as fast, and supports dashboard creation in days instead of weeks or months. The move also reduced management overhead, improved reliability, and helped accelerate broader cloud adoption across A1 Group.

A1 Austria

Beatrix Kemfelja

Head of CoE / Sales for Austria