HP XP P9000 Performance Advisor Software - Manual (Page 393)

Table 41 Metrics and descriptions (continued)
Description Metric Metric category
volume over a given time
interval.
It is the ratio of the total
frontend I/Os occurring on Frontend Vs. Backend Hit
Ratio
a ThP pool versus the total
backend tracks associated
with a ThP pool.
The total frontend I/Os rate
on this LDEV over a given LDEV Total IO – Frontend
time period. Total I/O of all
the LDEVs created in a
specified Raid Group over
the entire data collection
interval. I/Os on LDEV is
obtained from RMLIB but not
the I/Os on LDEV specific to
the Host Group.
The total random frontend
I/Os rate on this LDEV LDEV Total Random IO –
Frontend
during the entire collection
interval.
The total random frontend
read I/Os on this LDEV LDEV Random Reads –
Frontend
during the entire collection
interval.
Out of the total random
frontend read I/Os on this LDEV Random Reads Cache
Hits – Frontend
LDEV, the number of random
reads available in the
cache.
The total random frontend
write I/Os on this LDEV LDEV Random Writes –
Frontend
during the entire collection
interval.
The total sequential frontend
I/Os rate on this LDEV over
an entire collection interval. LDEV Total Sequential IO –
Frontend
The total sequential frontend
I/Os rate on this LDEV for a
given range of time. LDEV Sequential Reads –
Frontend
The number of sequential
frontend read I/Os serviced LDEV Sequential Reads
Cache Hits – Frontend
from the cache in terms of
the I/Os rate on this LDEV.
The total sequential frontend
write I/Os for this LDEV over
a given time interval. LDEV Sequential Writes –
Frontend
The output of LDEV Total
IO [(LDEV Random Total LDEV IO Miss –
Frontend
Read Cache Hits) +
(LDEV Sequential
Read Cache Hits)]
The total random and
sequential frontend read Total IO Reads – Frontend
Metrics and descriptions 393