Appendix D Estimation Of Nec Storage Performancemonitor File Size - NEC Storage Performance Monitor/Optimizer User Manual

Appendix D Estimation of NEC Storage PerformanceMonitor File Size

Appendix D Estimation of NEC Storage
The size of a statistic information history file and a statistic information summarized file can be
estimated by applying the number of disk array components (the number of host ports (HPs), disk
ports (DPs), logical disks (LDs), physical disks (PDs), replication directors (RDs) number of
cache (CACHE), and RANKs), the storage period of statistic information, and logging Interval
time to the following equations:
The size of the statistic information history file (byte) = A + (B (Statistic information storage
period (second) Logging Interval time (second)))
A = 272 + (Number of HPs 4) + (Number of DPs
m: A value obtained by calculating h by each RANK according to the following equations
h = 32 + i + j
When the quotient of ((Number of LDs in a RANK
When the quotient of ((Number of PDs in a RANK
B = 80 + (Number of HPs
The size of the statistic information primary summarized file (byte) = C + (D Hours for a day
(24))
The size of the statistic information secondary summarized file (byte) = C + (D
month (28 - 31))
C = 272 + (Number of HPs 4) + (Number of DPs
D = 80 + (Number of HPs
Moreover, the file size calculated by the equations above assumes a general case. If the
configuration or logical disk name is changed or a logical disk is transferred during the statistic
information accumulation period, the actual file size becomes larger than the calculated size.
PerformanceMonitor File Size
of PDs 48) + (Number of RDs
and summing up the individual values of all the RANKs
b 0:i = (a + 1) 16
b = 0:i = a 16
d 0:j = (c + 1) 16
d = 0:j = c 16
112) + (Number of DPs
(Number of PDs 64) + (Number of RDs 272) + (Number of CACHE
(Number of RANKs 64)
of PDs 48) + n
n: A value calculated in the same manner as for m to determine the size of the
statistic information history file
192) + (Number of DPs
(Number of PDs 112) + (Number of RANKs 112)
48
4) + (Number of LDs
16) + (Number of CACHE
2) (16) is a and the remainder is b,
1) (16) is c and the remainder is d,
48) + (Number of LDs 96) +
4) + (Number of LDs
80) + (Number of LDs 176) +
48) + (Number
16) + m
272) +
Days for a
48) + (Number