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Couchbase: The End of the Trade-off Game Before Couchbase, ops teams managing web applications faced tough compromises when it came to databases. Screaming speed or durable, safe data storage. Super scale out virtually overnight or scaling up with lots of hardware upgrades. Bleeding-edge NoSQL or safe, but inflexible relational solutions. Couchbase eliminates those trade-offs. We supply extraordinary speed with complete safety and incorruptibility.  A growth path that will never force you to rethink your application infrastructure from datacenter deployments to mobile devices - one continuous, synchronized flow. Solutions that complement your other systems - including your RDBMS.  Technology that meets the needs of developers and conforms to the mission-critical demands of ops teams. This really is the beginning of a new era of NoSQL solutions. Couchbase: database solutions for a post-relational world. Learn more.

"Hibernate OGM is an attempt to store data in a NoSQL data grid using he Hibernate Core engine rather than rewriting a JPA engine from scratch. The benefits are fairly obvious: reimplementing the complex JPA specification is a lot of work a new implementation would mature at a rather slow rate and risk of bugs would be high Hibernate is familiar to many people Earlier designs for this feature in Infinispan can be found on http://community.jboss.org/wiki/DesignofJPA-likeAPIandNewFineGrainedreplication"

"Neo4j is a graph database. It is an embedded, disk-based, fully transactional Java persistence engine that stores data structured in graphs rather than in tables. A graph (mathematical lingo for a network) is a flexible data structure that allows a more agile and rapid style of development."