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Explanation of display items
Display item
disk array name
sampling term
sampling time unit
no
iops
trrate
av.len
av.resp
w.ratio
r.hit
pref.hit
w.hit
busy
(2) Entire Disk Array Subsystem Performance Detail Report
Chronologically displays statistic information on the entire disk array. Below is shown a display
image (file name: 20010529NECStorage4100_psl_array.txt).
<< DISK ARRAY PERFORMANCE REPORT >>
disk array name
sampling time unit
date
time
iops trrate(MB/s) av.len(KB) av.resp(ms) w.ratio(%) r.hit(%) pref.hit(%) w.hit(%)
01-05-29 18:17
99.57
01-05-29 18:22
147.30
* 01-05-29 18:27
156.41
01-05-29 18:32
138.86
:
:
:
PERFORMANCE REPORT SUCCESSFUL.
Appendix C Report Format of Performance Report Editor
Nickname of the disk array
Period of accumulation of statistic information
Unit of accumulation of statistic information
"S": In seconds
"H": in hours
"D": In days
Device number of each component
External I/O density (count/second) in the accumulation period
External transfer rate (megabyte/second) in the accumulation period
External average transfer length (kilobyte) in the accumulation period
External average response time (millisecond) in the accumulation period
Ratio (percent) of write I/O in the accumulation period
Ratio (percent) of cache-hit read I/O in the accumulation period
Ratio (percent) of prefetch-hit read I/O among cache-hit read I/O in the
accumulation period
Ratio (percent) of cache-hit write I/O in the accumulation period
Average busy ratio (percent) in the accumulation period.
'***.**' is displayed if the information of the busy ratio does not exist.
NECStorage4100
300 S
4.18
42.99
6.67
46.36
7.00
45.85
6.36
46.88
:
:
39
Explanation
8.69
25.86
99.37
9.75
27.61
98.94
8.90
25.81
99.45
10.16
28.12
93.08
:
:
:
89.28
0.00
86.95
0.00
87.87
0.00
85.94
0.00
:
:
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