EMC Symmetrix enhanced performance metrics
In addition to LUN and Port performance metrics that can be collected from EMC Symmetrix arrays, data collection gathers other performance metrics by accessing storage devices via the EMC Unisphere REST API. The metrics can be accessed in the Dynamic Template Designer and the SQL Template Designer to generate report templates.
Unisphere records performance metrics in 5-minute intervals and this interval is not configurable. IT Analytics reporting assumes that this is a fixed interval.
The IT Analytics Data Collector captures EMC Symmetrix performance metrics every 15 minutes, by default. This interval is configurable. Whatever interval length is used (15-minute default or customer-specified), IT Analytics captures and exposes whatever 5-minute intervals were exposed by Unisphere since the last successful completion (maximum last 8 hours). On the first successful data collection, IT Analytics captures and exposes 8 hours of historical 5-minute intervals.
IT Analytics reports typically group the 5-minute intervals into broader time intervals, such as hours, days, or weeks. In these cases, reports display Symmetrix performance values (I/Os, MBps, and Latency) as an average, calculated from the 5-minute interval records that are provided by Unisphere.
The following additional EMC Symmetrix performance metrics are collected from the Unisphere API: