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Apache Accumulo for Developers by Guðmundur Jón Halldórsson

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Summary

Monitoring is the key when it comes to elasticity, failover, and resource management. To be able to see what the system is doing in real time is what is often needed to find problems, and to avoid problems if possible. Tools such as Ganglia, Nagios, and the Graylog2 server are helping many companies running large clusters with a minimum downtime.

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