
15.30
Command Line Interface Reference InForm OS Version 2.2.4
EXAMPLES
The following example displays two iterations of a histogram of service times for all virtual
volumes:
NOTES
■ Each service time histogram column shows the number of accesses with service times
between the time shown in the column's heading to the 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).
■ If a <VV_name> or <pattern> are specified, then virtual volumes with names that match
any of the patterns are listed, otherwise all virtual volumes are listed. These patterns are
glob-style patterns (see help on
sub,globpat).
■ 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, virtual volumes 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 -vvsum command to see data for only accesses from the host.
%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
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