NoSQL data stores such as Cassandra and Redis are memory and CPU intensive loads which can have unacceptable performance when run under virtualization in production environments.
Over the past two years, the OSv project has profiled some of the important bottlenecks for NoSQL applications, and designed a new open-source guest environment to improve performance in key areas such as JVM memory allocation and network throughput.
The side effect of this performance work has been to move some difficult tuning tasks off the administrator's to-do list and into the guest OS where they can be handled automatically with better responsiveness.
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