3PAR InForm® OS 2.3.1 CLI Administrator's Manual (320-200180 Rev B, February 2010)

12.2
Overview
3PAR InForm CLI Administrator’s Manual InForm OS Version 2.3.1
The purpose of this chapter is to explain how to display detailed statistics about the InServ
Storage Server.
12.1 Overview
The InForm CLI allows you to view aspects of system performance over time. You can view
statistics for the performance of VLUNs, virtual volumes, ports, physical disks, data cache
memory, and CPU usage using variations of the
stat command.
In addition, the InForm CLI provides service time and I/O size histograms for system resources
such as chunklets, logical and physical disks, ports, VLUNs, and virtual volumes.
12.2 Viewing Statistics
This section provides instructions on using commonly used CLI commands to access
performance statistics. The commands described here are a subset of the statistics commands
available. For a complete list of statistics commands, see the InForm OS Command Line
Interface Reference.
Performance statistics are available for the following:
■ physical disks
■ ports
■ VLUNs
■ virtual volumes
■ data cache memory
■ CPU usage
12.2.1 Viewing Statistics for Physical Disks
 To view physical disk statistics, issue the statpd command.
Data output can be further refined to display only physical disk statistics from:
◆ a specific physical disk by either its ID or WWN.
◆ specific nodes.