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PowerScale OneFS 9.8.0.0 Web Administration Guide

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Terminology

Items
An item is an aspect of the cluster or its environment that can be evaluated. Depending on the nature of the item, when the item is evaluated, either each node in the cluster is checked or the cluster as a whole is checked. For example, an item that evaluates the number of DIMM errors that have been logged checks the logs on each node in the cluster. An item that evaluates the amount of free space remaining on the cluster evaluates the cluster as a whole.
Checklists
A checklist defines a list of one or more items to be evaluated.
Parameters
Parameters are elements of items to which you can assign specific values. For example, the item auth_ad_clock_skew contains a parameter that is named ad_provider. You can assign a value such as win_ad to the ad_provider parameter using the isi healthcheck parameters set command.
Evaluations
Items and checklists can be evaluated. When an item or checklist is evaluated, the results are saved in the /ifs/.ifsvar/modules/health-check/results/evaluations directory.
Freshness
Each item has a default Freshness value. The Freshness value defines whether a new value is retrieved for an item being evaluated, or a cached value from a previous evaluation is retrieved. For example, if the Freshness value of an item is 1D (one day), and you evaluate an item less than one day after a previous evaluation was run, the value from the previous evaluation is returned rather than a new value.
Schedules
A schedule determines the period or time frame that is specified for performing health evaluation of clusters.

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