IBM XIV User Manual

The year, month and day are separated by dashes, and the optional hours, minutes
and seconds are separated by colons.
Output units:
v Very Large blocks - are >512KB
v Large blocks - are 64-512KB
v Medium blocks - are 8-64KB
v Small blocks - are 0-8KB
v The latency is in Microsecond
v The bandwidth is in KB
perf_class
v The perf_class parameter enables to display the performance class aggregated
statistics for bandwidth and IOPS.
Id Name Default Position
time Time 1
failures Failures N/A
aborts Aborts N/A
read_hit_very_
large_iops
Read Hit Very large - IOps 2
read_hit_very_
large_latency
Read Hit Very large - Latency 3
read_hit_very_
large_
throughput
Read Hit Very large -
Throughput
4
read_hit_
large_iops
Read Hit Large - IOps 5
read_hit_
large_latency
Read Hit Large - Latency 6
read_hit_
large_
throughput
Read Hit Large - Throughput 7
read_hit_
medium_iops
Read Hit Medium - IOps 8
read_hit_
medium_latency
Read Hit Medium - Latency 9
read_hit_
medium_
throughput
Read Hit Medium - Throughput 10
read_hit_
small_iops
Read Hit Small - IOps 11
Chapter 21. Statistics
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IBM XIV Specifications

General

Power Supply	Redundant power supplies
Drive Type	SATA
Redundancy	Fully redundant components
Connectivity	Fibre Channel, iSCSI
Form Factor	Rack-mounted
Cache	Distributed cache across modules
Data Protection	Snapshots, remote mirroring
Performance	High throughput and low latency
Scalability	Modular, scale-out architecture
Cooling	Redundant cooling
Architecture	Grid-based, distributed architecture