HP 3PAR OS 3.1.3 Command Line Interface Reference

histld
DESCRIPTION
The histld command displays a histogram of service times for Logical Disks (LDs) in a timed
loop.
SYNTAX
histld [options <arg>] [<LD_name_or_pattern>...]
AUTHORITY
Any role in the system.
OPTIONS
-vv <VV_name>...|<pattern>...
Show only LDs that are mapped to Virtual Volumes (VVs) with names that match any of the names
or patterns specified. Multiple volumes or patterns can be repeated using a comma separated list.
-domain <domain_name>...|<pattern>...
Shows only LDs that are in domains with names that match any of the names or patterns specified.
Multiple volumes or patterns can be repeated using a comma separated list.
–metric both|time|size
Selects which metric to display. Metrics can be one of the following:
• both - (Default) Displays both I/O time and I/O size histograms.
• time - Displays only the I/O time histogram.
• size - Displays only the I/O size histogram.
–timecols <fcol> <lcol>
For the I/O time histogram, shows the columns from the first column <fcol> through last column
<lcol>. The available columns range from 0 through 31.
• The first column (<fcol>) must be a value greater than or equal to 0, but less than the value
of the last column (<lcol>) (default value of 6).
• The last column (<lcol>) must be less than or equal to 31 (default value of 15).
• The first column includes all data accumulated for columns less than the first column and the
last column includes accumulated data for all columns greater than the last column.
–sizecols <fcol> <lcol>
For the I/O size histogram, show the columns from the first column (<fcol>) through the last
column (<lcol>). Available columns range from 0 through 15.
• The first column (<fcol>) must be a value greater than or equal to 0, but less than the value
of the last column (<lcol>) (default value of 3).
• The last column (<lcol>) must be less than or equal to 15 (default value of 11).
-pct
Shows the access count in each bucket as a percentage. If this option is not specified, the histogram
shows the access counts.
NOTE: For the following options, by default the histogram shows data from the start of the
command.
–prev|–begin
166 Hist Commands