Documentation

Nagios-Plugins for Monitoring NetApps Buffer Cache, FlashCache and FlexCache

As described in WP-7107, 'Optimizing Storage Performance and Cost with Intelligent Caching' NetApp uses a multilevel approach to read caching.

Fig. 1: How Buffer- and Flash-Cache interact with the CPUs
Source: NetApp WP7107

The first-level read cache is provided by the system buffer cache.
NetApp FlashCache® provides an optional second-level cache.
The third-level read cache is provided by NetApp FlexCache®, which is part of Data ONTAP® at no additional cost. This technology fits mostly into large installations like render-farms.

The Cache-Bundle provides Nagios-Plugins for all three caching-technologies and consists of the following plugins:

Plugins monitoring the system memory (buffer-cache, NVRAM)

Currently all the cache-plugins are in a pre-alpha state.

Want to get a pre-release or send us feedback? Please write to il@netapp-monitoring.info