Java Versions That Are Supported; Energy Management; Ibm Energyscale Technology - IBM Power System E850C Technical Overview And Introduction

For information about Red Hat Enterprise Linux Advanced Server, see this site:
http://www.redhat.com/rhel/features
For information about Ubuntu Server, see this site:
http://www.ubuntu.com/server

2.14.4 Java versions that are supported

Java is supported on POWER8 servers. For best use of the performance capabilities and
most recent improvements of POWER8 technology, upgrade Java based applications to
Java 8, Java 7, or Java 6. For more information, visit the following website:
http://www.ibm.com/developerworks/java/jdk/aix/service.html

2.15 Energy management

The Power E850C systems have features to help clients become more energy efficient. IBM
EnergyScale™ technology enables advanced energy management features to conserve
power dramatically and dynamically, and further improve energy efficiency. Intelligent Energy
optimization capabilities enable the POWER8 processor to operate at a higher frequency for
increased performance and performance per watt, or dramatically reduce frequency to save
energy.

2.15.1 IBM EnergyScale technology

IBM EnergyScale technology provides functions to help the user understand and dynamically
optimize processor performance versus processor energy consumption, and system
workload, to control IBM Power Systems power and cooling usage.
EnergyScale uses power and thermal information that is collected from the system to
implement policies that can lead to better performance or better energy usage. IBM
EnergyScale has the following features:
Power trending
EnergyScale provides continuous collection of real-time server energy consumption. It
enables administrators to predict power consumption across their infrastructure and to
react to business and processing needs. For example, administrators can use such
information to predict data center energy consumption at various times of the day, week,
or month.
Power saver mode
Power saver mode lowers the processor frequency and voltage on a fixed amount,
reducing the energy consumption of the system while still delivering predictable
performance. This percentage is predetermined to be within a safe operating limit and is
not user configurable. The server is designed for a fixed frequency drop of almost 50%
down from nominal frequency (the actual value depends on the server type and
configuration).
Power saver mode is not supported during system start, although it is a persistent
condition that is sustained after the boot when the system starts running instructions.
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IBM Power System E850C: Technical Overview and Introduction