How Metric Collections Works
Metric collection occurs at the same time and with same collection interval as discovery.
COLLECTION FREQUENCY
Metrics are collected with frequency set by user on configuration screens. Recommended initial collection time is 10 minutes.
DATA GRANULARITY
The granularity of the data is based on the a specific metric setup in Hitachi RAID configuration. Some performance metrics have granularity of 1 minute, some 5, 10 minutes, some are even higher. Please refer to your Hitachi RAID configuration for more details.
METRICS SOURCES
Depending on lab configuration and user choice we query performance data from two different sources:
Storage systems monitored with OPS Center - Ops Center Analyzer REST API is used to query for performance metrics.
Storage systems monitored with Hitachi Command Suite - Tuning Manager REST API is used to query for performance data.
For details about how metrics are collected for your storage system please refer to Hitachi documentation. Especially these two documents are useful in explaining possible lab deployments:
https://knowledge.hitachivantara.com/Documents/Management_Software/Ops_Center/Analyzer/10.3.x/Add_and_manage_probes_on_the_Analyzer_probe_server/02_Configuring_the_RAID_Agent_to_monitor_Hitachi_Enterprise_Storage_Systems#r_ias_check_storage_hes
https://knowledge.hitachivantara.com/Documents/Management_Software/Ops_Center/Analyzer/10.3.x/Ops_Center_Analyzer_REST_API_resources/37_API_resources_-_RAID_Agent#GUID-EC050CAC-76F2-4637-A9D1-EEB569EAFB16
Hitachi VSP integration is collecting performance data from the following categories
RAID_PI_CLPS - Cache metrics
RAID_PI_PRCS - Processor metrics
RAID_PI_LDS - LDEV metrics
RAID_PI_RGS - Parity Group metrics
RAID_PI_PLS - Storage Pool metrics
RAID_PI_PTS - Port metrics
The complete list of metrics for this integration is available in a separate guide.