Viewing Statistical Histogram Reports For Performance; Viewing Histograms; Viewing Histograms For Chunklets; Viewing Histograms For Logical Disks - HP 3PAR StoreServ 7200 2-node Administrator's Manual

Viewing Statistical Histogram Reports for Performance

Performance histogram statistical reports are available for the following. You can specify whether
to display I/O time and/or I/O size, the number of histogram columns, and whether to separate
read and write data or display the total I/O for:
LDs
Physical disks
Ports
Virtual volume LUN exports

Viewing Histograms

This section provides instructions on using common CLI commands to access histogram data on
system resources. The commands described here are a subset of the histogram commands available.
Histogram data can be viewed for the following resources:
chunklets
LDs
physical disks
ports
VLUNs
virtual volumes
For a complete list of histogram commands, see the HP 3PAR Command Line Interface Reference.

Viewing Histograms for Chunklets

NOTE: The setstatch command must be issued to enable statistics collection on chunklets
before chunklet histogram data can be viewed.
To view histogram data for chunklets, issue the histch command.
Several filters are provided to refine the data output to display only data from specific chunklets
and LDs. Additional filters are provided to customize the way the histogram data is displayed. For
complete details about histch command options and for sample command data output, see the
HP 3PAR Command Line Reference.

Viewing Histograms for Logical Disks

To view histogram data for LDs, issue the histld command.
The histld command provides filters to refine the data output to display only data from LDs
mapped to specific virtual volumes. Additional filters are provided to customize the way the
histogram data is displayed. For complete details about histld command options and for sample
command data output, see the HP 3PAR Command Line Reference.

Viewing Histograms for Physical Disks

To view histogram data for physical disks, issue the histpd command.
Histogram data output can be further refined to display physical disk data from:
a physical disk, specified by either its ID or WWN.
specific nodes.
specific PCI slots.
specific ports.
124 Viewing Statistics and Histograms