HP 3PAR StoreServ 7400 2-node HP 3PAR Command Line Interface Reference (OS 3.1 - Page 203

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 or 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. histvv 203