HP 2000SA G2-Modular-Smart-Array - Manual (Page 32)

Table 6 Graphing metrics for volumes
Available with P2000 G3
MSA firmware version Volume individual metrics Volume group metrics
TS200 or later
Read IOPs—Read operations per second, calculated over
the interval since this statistic was last requested.
IOPs (Read,Write,Total)
nl .
nl Bytes per second
(Read,Write,Total)
nl
Write IOPs—Write operations per second, calculated over
the interval since this statistic was last requested.
.
nl
Total IOPs—Read+Write operations per second, calculated
over the interval since this statistic was last requested.
Average IO Size
(Read,Write,Total)
Read Bytes per Sec—Data bytes read per second
calculated over the interval since this statistic was last
requested.
Write Bytes per Sec—Data bytes written per second
calculated over the interval since this statistic was last
requested.
Total Bytes per Sec—Data bytes transferred per second
calculated over the interval since this statistic was last
requested.
Avg Read Size—Average read transfer size over the
interval since this statistic was last requested.
Avg Write Size—Average write transfer size over the
interval since this statistic was last requested.
Avg IO Size—Average read and write transfer size over
the interval since this statistic was last requested.
Write Cache Percent—Percentage of cache used on behalf
of this volume.
Write Cache Space—Cache size used on behalf of this
volume.
Read Ahead Operations—Number of read pre-fetch or
anticipatory-read operations.
Full Stripe Write Destages—Number of times the flush from
cache to disk is full stripe.
Small Destages—Number of times flush from cache to disk
is not a full stripe.
Read Cache Hits—For the controller that owns the volume,
the number of times the block to be read is found in cache.
Read Cache Misses—For the controller that owns the
volume, the number of times the block to be read is not
found in cache.
Read Cache Hit Ratio (%)—Percent of reads served from
cache since last counter reset.
Write Cache Hits—For the controller that owns the volume,
the number of times the block written to is found in cache.
Write Cache Misses—For the controller that owns the
volume, the number of times the block written to is not found
in cache.
Write Cache Hit Ratio (%)—Percent of writes served from
cache since last counter reset.
32 HP P2000 MSA Performance Tool