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      <h2><i class="fa fa-flask"></i> Data model</h2>
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      <p class="desc">Prometheus implements a highly dimensional data model. Time series are identified by a metric name and a set of key-value pairs.</p>
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      <p><a class="btn btn-default" href="/docs/concepts/data_model/" role="button">View details &raquo;</a></p>
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      <h2><i class="fa fa-search"></i> Query language</h2>
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      <p class="desc">A flexible query language allows slicing and dicing of collected time series data in order to generate ad-hoc graphs, tables, and alerts.</p>
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      <p><a class="btn btn-default" href="/docs/querying/basics/" role="button">View details &raquo;</a></p>
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      <h2><i class="fa fa-line-chart"></i> Visualization</h2>
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      <p class="desc">Prometheus has multiple modes for visualizing data: a built-in expression browser, a GUI-based dashboard builder, and a console template language.</p>
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      <p><a class="btn btn-default" href="/docs/visualization/promdash/" role="button">View details &raquo;</a></p>
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      <h2><i class="fa fa-database"></i> Storage</h2>
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      <p class="desc">Prometheus stores time series in memory and on local disk in an efficient custom format. Scaling is achieved by functional sharding and federation.</p>
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      <p><a class="btn btn-default" href="/docs/operating/storage/" role="button">View details &raquo;</a></p>
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      <h2><i class="fa fa-cog"></i> Operation</h2>
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      <p class="desc">Each server is independent for reliability, relying only on local storage. Written in Go, all binaries are statically linked and easy to deploy.</p>
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      <p><a class="btn btn-default" href="/docs/operating/configuration/" role="button">View details &raquo;</a></p>
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      <h2><i class="fa fa-code"></i> Client libraries</h2>
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      <p class="desc">Client libraries allow easy instrumentation of services. Currently, Go, Java, and Ruby are supported. Custom libraries are easy to implement.</p>
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      <p><a class="btn btn-default" href="/docs/instrumenting/clientlibs/" role="button">View details &raquo;</a></p>
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      <h2><i class="fa fa-warning"></i> Alerting</h2>
      <p class="desc">Alerts are defined based on Prometheus's flexible query language and maintain dimensional information. An alertmanager handles notifications and silencing.</p>
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      <p><a class="btn btn-default" href="/docs/querying/rules/#alerting-rules" role="button">View details &raquo;</a></p>
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      <h2><i class="fa fa-cloud-upload"></i> Exporters</h2>
      <p class="desc">Existing exporters allow bridging of third-party data into Prometheus. Examples: system statistics, as well as Docker, HAProxy, StatsD, and JMX metrics. </p>
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      <p><a class="btn btn-default" href="/docs/instrumenting/exporters/" role="button">View details &raquo;</a></p>
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