HP XP Performance Advisor Software - Manual (Page 111)

Description Metrics Category
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.
NOTE: In
a 100% ThP environment,
the
Dashboard Backend metrics show
zero
values for an XP or an XP7 disk
array.
This is because, the I/O per
second
data and the MB/second data
throughput
is on the V-Vols rather than
the
pool LDEVs in a RAID group. To
view
backend transfers on such RAID
groups,
refer to the corresponding
combined
backend transfer values.
If you want to view the ThP pool RAID
group utilization for a RAID group, go
to Charts > THP Pool main category,
select a RAID group and plot the RAID
group utilization graph (RG Util (%)
metric.
Avg MP Blade Util (%): Average
utilization of the individual installed MP
blades. Avg MP Blade Util (%) MP Blade
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