HP StorageWorks P9000 Performance Advisor Software v5.3 User and Troubleshooting Guide (T1789-96322, August 2011)

DescriptionMetricMetric category
Each External RAID group
value is the sum of all the
LDEVs in all the Ext-RAID
groups in the array.
The chart displays only
one Ext-RAID Group if
configuration data is
collected through the
inband mode. The value
displayed in the chart is a
sum of all the Ext-RAID
Groups in the array.
The total frontend I/Os
made on an external
volume.
Ext-RAID Group Total IO
The total random frontend
I/Os rate on this external
volume during the entire
collection interval.
Ext-RAID Group Total
Random IO
The total random frontend
reads rate on this external
volume during the entire
collection interval.
Ext-RAID Group Random
Reads
Out of the total random
frontend reads rate on this
external volume, the num-
ber of random reads
available in the cache.
Ext-RAID Group Random
Read Cache Hits
The total random frontend
writes rate on this external
volume during the entire
collection interval.
Ext-RAID Group Random
Writes
The total sequential fron-
tend I/Os rate on this ex-
ternal volume over an en-
tire collection interval.
Ext-RAID Group Total Se-
quential IO
The total sequential fron-
tend I/Os rate on this ex-
ternal volume for a given
range of time.
Ext-RAID Group Sequen-
tial Reads
The number of sequential
frontend reads serviced
from the cache in terms of
the I/Os rate on this ex-
ternal volume.
Ext-RAID Group Sequen-
tial Read Cache Hits
The total sequential fron-
tend write rate for this ex-
ternal volume over a giv-
en time interval.
Ext-RAID Group Sequen-
tial Writes
It is the ratio of the total
frontend I/Os occurring
on a ThP pool versus the
total backend tracks asso-
ciated with a ThP pool.
Frontend Vs. Backend Hit
Ratio
The total frontend I/Os
rate on this LDEV over a
given time period.
LDEV Total IO – Frontend
Metric Category, metrics, and descriptions444