Use the groupby clause of the vxdmpadm iostat command to display cumulative I/O statistics listings per DMP node, controller, array port id, or host-array controller pair and enclosure. If the groupby clause is not specified, then the statistics are displayed per path.

To group by DMP node:

# vxdmpadm iostat show groupby=dmpnode [all | dmpnodename=dmpnodename 
| enclosure=enclr-name] 

To group by controller:

# vxdmpadm iostat show groupby=ctlr [ all | ctlr=ctlr ] 

For example:

# vxdmpadm iostat show groupby=ctlr ctlr=fscsi0

cpu usage = 843us    per cpu memory = 49152b
              OPERATIONS      BLOCKS          AVG TIME(ms)
CTLRNAME   READS  WRITES   READS   WRITES   READS   WRITES
fscsi0     276    0        2205    0         0.03     0.00

To group by arrayport:

# vxdmpadm iostat show groupby=arrayport [ all | pwwn=array port wwn
 | enclosure=enclr portid=array-port-id ]

For example:

# vxdmpadm iostat show groupby=arrayport enclosure=HDS9500-ALUA0 portid=1A 	             

            OPERATIONS        BLOCKS       AVG TIME(ms)
PORTNAME  READS   WRITES  READS  WRITES  READS   WRITES
1A 	      224      14     54      7       4.20 	  11.10

To group by enclosure:

# vxdmpadm iostat show groupby=enclosure [ all | enclosure=enclr ] 

For example:

# vxdmpadm iostat show groupby=enclosure enclosure=EMC_CLARiiON0

               OPERATIONS       BLOCKS       AVG TIME(ms)
ENCLRNAME    READS  WRITES  READS  WRITES  READS   WRITES
EMC_CLARiiON	0		    0		     0	     0	       0.00     0.00

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=hdisk40

cpu usage = 906us    per cpu memory = 49152b
             OPERATIONS      BLOCKS          AVG TIME(ms)
PATHNAME  READS  WRITES   READS   WRITES   READS    WRITES
hdisk100  7      0        70      0         0.02      0.00
hdisk115  12     0        58      0         0.03      0.00
hdisk40   10     0        101     0         0.02      0.00
hdisk55   5      0        21      0         0.04      0.00

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:

For example: To display average read/write times in microseconds.

# vxdmpadm -u us iostat show pathname=hdisk115

cpu usage = 1030us    per cpu memory = 49152b
              OPERATIONS       BLOCKS           AVG TIME(us)
PATHNAME   READS    WRITES  READS    WRITES   READS    WRITES
hdisk115   12       0       58       0        32.00      0.00