HP XP P9000 Performance Advisor Software v5.5 User Guide (T1789-96337, Februrary 2013)

DescriptionMetricsCategory
In addition, the Side File Usage (%)
data and the Cache Size (total in MB)
are also displayed.
RG Seq Reads (IOPS) (Avg Seq Reads),
RG NonSeq Reads (IOPS) (Avg NonSeq
RG Seq Reads (IOPS) (Avg Seq
Reads), RG NonSeq Reads (IOPS)
Backend
Reads), RG Writes (IOPS) (Avg Writes):(Avg NonSeq Reads), RG Writes
Average of the frontend sequential and(IOPS) (Avg Writes), and Avg RG Util
random I/Os on an individual RAID(%), Avg DKA Pair Util (%), and
Combined Backend Transfer (IOPS) group in the XP or the P9000 disk array
backend.
Combined Backend Transfers (IOPS),
which is derived as follows:
• If any of the physical LDEVs from a
RAID group is configured in a ThP
pool, the sum of the backend
transfer on all the V-Vols in that pool
will be shown as combined backend
transfer for that RAID group.
• If any of the physical LDEVs from a
RAID group is configured in multiple
ThP pools, the sum of the backend
transfer on all the ThP pools will be
shown as combined backend
transfer for that RAID group. * is
displayed beside the combined
backend transfer value to indicate
the same.
The backend transfer of each ThP
pool is the sum of backend transfer
on V-Vols belonging to that ThP
pool.
For example, consider that physical
LDEVs 0:00 and 0:01 from RG_1
are contributing to ThP_Pool_1 and
0:02 from RG_1 is contributing to
ThP_Pool_2. If the backend transfers
on ThP_Pool_1 is 50 I/Os and
ThP_Pool_2 is 90 I/Os, the
combined backend transfer on RG_1
is 140 I/Os.
• If physical LDEVs from multiple RAID
groups are configured in a ThP pool,
the combined backend transfer will
be reported as an aggregate value
for all the RAID groups. * is
displayed beside the combined
backend transfer value to indicate
the same.
For example, consider that physical
LDEVs 0:00 from RG_1 and 1:00
from RG_2 are contributing to
ThP_Pool_1. If the backend transfers
on ThP_Pool_1 is 60 I/Os, the
combined transfer on RG_1 and
RG_2 is 60 I/Os each.
Avg RG Util (%): Overall utilization of
individual RAID groups.
Avg DKA Pair Util (%): Overall
utilization of the individual MPs on each
installed DKA pair.
110 Monitoring performance of XP and P9000 disk arrays