Home > Storage > PowerScale (Isilon) > Product Documentation > Storage (general) > Dell PowerScale: Considerations and Best Practices for Large Clusters > Cluster monitoring and auditing
The cluster event logger (CELOG) is OneFS’ alerting and reporting framework and is vital for keeping abreast of hardware and software issues across a large cluster.
For a full listing and details of available CELOG events and alerts, see the OneFS Event Reference Guide.
For extra-large clusters, where group changes and other transient issues occur fairly frequently, the quantity of CELOG alerts and events management can become overwhelming. Alternate, and often preferable, approaches to cluster monitoring include:
A software development kit (SDK) is available for OneFS powered clusters. This SDK includes a Data Insights Connector which uses Grafana and InfluxDB to enable custom monitoring, alerts, and notifications. The SDK is freely available for downloaded from GitHub,
A OneFS App is also available for Splunk Enterprise, which collects and reports on cluster configuration and performance data, plus some basic file system auditing. The app comes in two parts – a technology add-on (TA) that contains collection scripts, and the app itself which provides the visualizations.