Andrey Zaychikov is solutions architect at Amazon Web Services in this blog post will share experiences from a cross-regional migration of large-scale NoSQL database clusters (from Europe to the U.S.).
Migration includes amongst others
- Apache Cassandra cluster with 25 nodes, 18 TB of data
- MongoDB cluster with 150 GB of data, distributed across 4 shards, each shard - replica set includes the master and two slaves
- Elasticsearch cluster - search index of 1 TB
- Redis - one master and two slaves, with 15 GB, 10 GB, and 1 GB of data and very high write speeds
Migration process required zero downtime, no changes in the application and database structure, minimal use of third-party tools.
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