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Amazon just announced their new graph database service, called Amazon Neptune. As per a TechCrunch article,
Amazon Neptune has been optimized to handle billions of relationships and run queries within milliseconds. Neptune supports fast-failover, point-in-time recovery and Multi-AZ deployments. And you can also encrypt data at rest.
This is very exciting news for the entire tech ecosystem. It clearly shows that graph databases are going mainstream. Already many tech companies are using existing graph solutions or building their own graph-like systems.