Name Type Description Mandatory Default
local_fc_
port
N/A Limits statistics to
I/O performed on
the specified FC
port only.
N All ports.
vol Object name Limits statistics to
the specified
volume only.
N All volumes.
start N/A Starting point for
the statistics
report.
N N/A
end N/A Ending point for
the statistics
report.
N N/A
count Positive integer Number of time
points reported.
Y N/A
interval Positive integer The length of time
in each statistic's
time point. The
resolution of this
number is set in
resolution_unit.
Y N/A
resolution
_unit
Enumeration Sets the unit of
measurement for
the length of each
bin.
Y N/A
perf_class Object name Displays
performance class
aggregated
statistics for
bandwidth and
IOPS.
N All Performance
classes.
This command lists I/O statistics. The count parameter sets the number of lines in
the statistics report. Together, the interval and resolution_unit set the length of time
for each statistics line. Either start or end timestamps must be provided. These
timestamps set the time for the statistics report. Other parameters restrict statistics
to a specific host, host port, volume, interface port and so on.
For each line of statistics, 48 numbers are reported, which represent all the
combinations of reads/writes, hits/misses and I/O size reporting for each of the 16
options for bandwidth, IOPS and latency. Statistics collection is limited to 32 pools
and 200 volumes.
The syntax for the start and end fields is as follows: Y-M-D[.[h[:m[:s]]]], where
the ranges are as follows:
v Y - year (four digit)
v M - month (1-12)
v D - day (1-31)
v h - hour (0-23, with 0 as default)
v m - minute (0-59, with 0 as default)
v s - second (0-59, with 0 as default)
Note:
472 IBM XIV Storage System User Manual
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