HP 3PAR OS 3.1.3 Command Line Interface Reference

EXAMPLES
The following example displays two iterations of a histogram of service times for all VVs:
%cli histvv –iter 2
12:53:03 10/20/04 ------------Time (millisec)------------
VVname 0.26 0.53 1.05 2.1 4.2 8.4 17 34 67 135
admin 0 0 0 0 0 0 0 0 0 0
tpvv 29 0 0 0 0 0 0 0 0 0
---------------------------------------------------------
total 29 0 0 0 0 0 0 0 0 0
12:53:05 10/20/04 ------------Time (millisec)------------
VVname 0.26 0.53 1.05 2.1 4.2 8.4 17 34 67 135
admin 0 0 0 0 0 0 0 0 0 0
tpvv 105 0 0 0 0 0 0 0 0 0
---------------------------------------------------------
total 105 0 0 0 0 0 0 0 0 0
NOTES
• Each service time histogram column shows the number of accesses with service times between
the point in time shown in the column's heading to the point in time shown in the heading of
the column to its right (or infinity for the last column).
• Each I/O size histogram column shows the number of accesses with I/O size between the
size shown in the column's heading to the size shown in the heading of the column to its right
(or infinity for the last column). Unless all columns are shown, the first column shows the number
of accesses with service times less than the heading of the second column.
• If a <VV_name> or <pattern> are specified, then VVs with names that match any of the
patterns are listed, otherwise all VVs are listed. Refer to “Glob-Style Pattern” (page 12) for
further information.
• Virtual volumes may be accessed externally by hosts and internally by the prefetcher. Virtual
volume data measured by this command include accesses by the prefetcher.
• In addition to external accesses by hosts, VVs can be read internally by the system read-ahead
prefetcher. The histvv data includes read-ahead accesses from the prefetcher that can cause
the read data to appear more than seen by the hosts. Use the histvlun -vvsumcommand
to see data for only accesses from the host.
186 Hist Commands