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Zenoss Core 3.x Network and System Monitoring by Michael Badger

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Data layer

As we might expect, databases are the heart of the data layer, and Zenoss Core stores data in three types of databases. The Collection layer funnels device information to ZenHub, which in turns stores the data in the appropriate place, as seen in the following illustration.

Data layer

Events are stored in a MySQL database. Zenoss Core generates Events when an established threshold is crossed, such as a server outage or high memory usage. Events trigger actions, such as e-mail or pager alerts.

Time series performance data gets stored in a Round Robin Database (RRD). A RRD differs from a linear database, such as MySQL, in that it's circular—which ...

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