Veritas Volume Manager 5.1 SP1 Administrator"s Guide (5900-1506, April 2011)

You can also filter out entities for which all data entries are zero. This option is
especially useful in a cluster environment which contains many failover devices.
You can display only the statistics for the active paths.
To filter all zero entries from the output of the iostat show command:
# vxdmpadm -z iostat show [all|ctlr=ctlr_name |
dmpnodename=dmp_device_name | enclosure=enclr_name [portid=portid] |
pathname=path_name|pwwn=port_WWN][interval=seconds [count=N]]
For example:
# vxdmpadm -z iostat show dmpnodename=c2t16d4
OPERATIONS BLOCKS AVG TIME(ms)
PATHNAME READS WRITES READS WRITES READS WRITES
c3t16d4 10 110 2 25 12.00 27.96
c2t17d4 20 126 4 29 9.50 19.41
You can now specify the units in which the statistics data is displayed. By default,
the read/write times are displayed in milliseconds up to 2 decimal places. The
throughput data is displayed in terms of ‘BLOCKS’ and the output is scaled,
meaning that the small values are displayed in small units and the larger values
are displayed in bigger units, keeping significant digits constant.The -u option
accepts the following options:
Displays throughput in kiloblocks.k
Displays throughput in megablocks.m
Displays throughput in gigablocks.g
Displays throughput in exact number of bytes.bytes
Displays average read/write time in microseconds.us
For example: To display average read/write times in microseconds.
# vxdmpadm -u us iostat show pathname=c2t17d4
OPERATIONS BLOCKS AVG TIME(microsec)
PATHNAME READS WRITES READS WRITES READS WRITES
c2t17d4 20 126 4 29 9500.00 19413.79
Administering Dynamic Multi-Pathing
Administering DMP using vxdmpadm
176