Learn how IBM Solution for WebSphere Mobile and Web Applications on PowerLinux makes IBM WebSphere Application Server Liberty profile available for PowerLinux servers. This solution harnesses the strength of IBM hardware and software, improving reliability, availability and security. For more information on Power Systems , visit http://ibm.co/Lx6hfc.
Visit http://bit.ly/KWh5Dx to 'Follow' the official Twitter handle of IBM India Smarter Computing.
EnterpriseDB’s Postgres Plus Advanced Server now on IBM PowerLinux. More Power.More Performance. It's PowerDB.
Features of the presentation:
Advantage to Enterprises
Real alternative to conventional proprietary Databases
A choice that gives you BIG savings
Cost efficient + technologically advanced
EnterpriseDB Postgres Plus Advanced Server provides Oracle compatibility with enterprise performance features built upon the legendary open source PostgreSQL platform, all certified on IBM’s latest Linux on Power servers.
The highlights of this presentation include:
* An overview of the database landscape – past, present and future
* Postgres NoSQL capabilities for document and key-value store work loads
* How you can lower your Total-Cost-of-Ownership (TCO) with Postgres in conjunction with your current database
* What resources are available to assess the right decision
* How the IBM Power Systems™ platform is fueling performance, reliability, security, TCO and virtualization for new applications, markets and geographies.
* Suggested audience: This presentation is intended for strategic IT and Business Decision-Makers involved in IT infrastructure and application development.
PowerVM Live Partition Mobility in IBM PureFlexLuca Comparini
Technical overview in relation to the IBM PowerVM Live Partition Mobility (LPM): LPM is an IBM PowerVM® feature capable of migrating a running partition from one IBM Power Systems™ server to another; migration is performed without disrupting the transactions and the applications that are running on the partition, in other words transparently for the business.
LPM is not a business continuity feature. LPM improves the serviceability and maintainability of an environment running on Power Systems servers. In other words, this feature is designed to make the IT manager's life easier, when a planned maintenance is scheduled because it is capable of reducing the downtime to zero for a planned maintenance activity. Reasons for using LPM also include workload consolidation (from many servers to one), workload balancing (distribute workloads across a pool of servers), and workload resilience in response to a Predictive Failure Analysis (PFA) event.
This document provides an overview and announcements about IBM Power Systems following the launch of POWER8 technology. Key points include:
- New Power Systems servers, the S814, S822, S824 and S812L, are introduced to provide efficient consolidation of business workloads and designed for demanding environments.
- PowerKVM is a new open source virtualization option for Power Systems Linux servers to provide simplicity for Linux administrators.
- Solutions are optimized for big data, analytics and cloud workloads leveraging the POWER8 architecture enhancements including more cores, threads and memory.
- Integrated solutions like the IBM Solution for Hadoop and IBM Solution for Analytics are announced to simplify deploying analytics applications on Power Systems
This IBM Redpaper provides a brief overview of OpenStack and a basic familiarity of its usage with the IBM XIV Storage System Gen3. The illustration scenario that is presented uses the OpenStack Folsom release implementation IaaS with Ubuntu Linux servers and the IBM Storage Driver for OpenStack. For more information on IBM Storage Systems, visit http://ibm.co/LIg7gk.
Visit http://bit.ly/KWh5Dx to 'Follow' the official Twitter handle of IBM India Smarter Computing.
Learn how all flash needs end to end Storage efficiency. For more information on IBM FlashSystem, visit http://ibm.co/10KodHl.
Visit http://bit.ly/KWh5Dx to 'Follow' the official Twitter handle of IBM India Smarter Computing.
EnterpriseDB’s Postgres Plus Advanced Server now on IBM PowerLinux. More Power.More Performance. It's PowerDB.
Features of the presentation:
Advantage to Enterprises
Real alternative to conventional proprietary Databases
A choice that gives you BIG savings
Cost efficient + technologically advanced
EnterpriseDB Postgres Plus Advanced Server provides Oracle compatibility with enterprise performance features built upon the legendary open source PostgreSQL platform, all certified on IBM’s latest Linux on Power servers.
The highlights of this presentation include:
* An overview of the database landscape – past, present and future
* Postgres NoSQL capabilities for document and key-value store work loads
* How you can lower your Total-Cost-of-Ownership (TCO) with Postgres in conjunction with your current database
* What resources are available to assess the right decision
* How the IBM Power Systems™ platform is fueling performance, reliability, security, TCO and virtualization for new applications, markets and geographies.
* Suggested audience: This presentation is intended for strategic IT and Business Decision-Makers involved in IT infrastructure and application development.
PowerVM Live Partition Mobility in IBM PureFlexLuca Comparini
Technical overview in relation to the IBM PowerVM Live Partition Mobility (LPM): LPM is an IBM PowerVM® feature capable of migrating a running partition from one IBM Power Systems™ server to another; migration is performed without disrupting the transactions and the applications that are running on the partition, in other words transparently for the business.
LPM is not a business continuity feature. LPM improves the serviceability and maintainability of an environment running on Power Systems servers. In other words, this feature is designed to make the IT manager's life easier, when a planned maintenance is scheduled because it is capable of reducing the downtime to zero for a planned maintenance activity. Reasons for using LPM also include workload consolidation (from many servers to one), workload balancing (distribute workloads across a pool of servers), and workload resilience in response to a Predictive Failure Analysis (PFA) event.
This document provides an overview and announcements about IBM Power Systems following the launch of POWER8 technology. Key points include:
- New Power Systems servers, the S814, S822, S824 and S812L, are introduced to provide efficient consolidation of business workloads and designed for demanding environments.
- PowerKVM is a new open source virtualization option for Power Systems Linux servers to provide simplicity for Linux administrators.
- Solutions are optimized for big data, analytics and cloud workloads leveraging the POWER8 architecture enhancements including more cores, threads and memory.
- Integrated solutions like the IBM Solution for Hadoop and IBM Solution for Analytics are announced to simplify deploying analytics applications on Power Systems
This IBM Redpaper provides a brief overview of OpenStack and a basic familiarity of its usage with the IBM XIV Storage System Gen3. The illustration scenario that is presented uses the OpenStack Folsom release implementation IaaS with Ubuntu Linux servers and the IBM Storage Driver for OpenStack. For more information on IBM Storage Systems, visit http://ibm.co/LIg7gk.
Visit http://bit.ly/KWh5Dx to 'Follow' the official Twitter handle of IBM India Smarter Computing.
Learn how all flash needs end to end Storage efficiency. For more information on IBM FlashSystem, visit http://ibm.co/10KodHl.
Visit http://bit.ly/KWh5Dx to 'Follow' the official Twitter handle of IBM India Smarter Computing.
Learn about vSphere Storage API for Array Integration on the IBM Storwize family. IBM Storwize V7000 Unified combines the block storage capabilities of Storwize V7000 with file storage capabilities into a single system for greater ease of management and efficiency. For more information on IBM Storage Systems, visit http://ibm.co/LIg7gk.
Visit http://bit.ly/KWh5Dx to 'Follow' the official Twitter handle of IBM India Smarter Computing.
Learn about IBM FlashSystem 840 and its complete product specification in this Redbook. FlashSystem 840 provides scalable performance for the most demanding enterprise class applications. IBM FlashSystem 840 accelerates response times with IBM MicroLatency to enable faster decision making. For more information on IBM FlashSystem, visit http://ibm.co/10KodHl.
Visit http://on.fb.me/LT4gdu to 'Like' the official Facebook page of IBM India Smarter Computing.
Learn about the IBM System x3250 M5,.The x3250 M5 offers the following energy-efficiency features to save energy, reduce operational costs, increase energy availability, and contribute to a green environment, energy-efficient planar components help lower operational costs. For more information on System x, visit http://ibm.co/Q7m3iQ.
http://www.scribd.com/doc/210746104/IBM-System-x3250-M5
This Redbook talks about the product specification of IBM NeXtScale nx360 M4. The NeXtScale nx360 M4 server provides a dense, flexible solution with a low total cost of ownership (TCO). The half-wide, dual-socket NeXtScale nx360 M4 server is designed for data centers that require high performance but are constrained by floor space. For more information on System x, visit http://ibm.co/Q7m3iQ.
http://www.scribd.com/doc/210745680/IBM-NeXtScale-nx360-M4
The IBM System x3650 M4 HD is a (1) 2-socket 2U rack-optimized server that supports up to 32 internal drives and features an innovative design for optimal performance, uptime, and dense storage. It offers (2) excellent reliability, availability, and serviceability for improved business environments. The server is (3) designed for easy deployment, integration, service, and management.
Here are the product specification for IBM System x3300 M4. This product can be managed remotely.The x3300 M4 server contains IBM IMM2, which provides advanced service-processor control, monitoring, and an alerting function. The IMM2 lights LEDs to help you diagnose the problem, records the error in the event log, and alerts you to the problem. For more information on System x, visit http://ibm.co/Q7m3iQ.
Visit http://on.fb.me/LT4gdu to 'Like' the official Facebook page of IBM India Smarter Computing.
Learn about IBM System x iDataPlex dx360 M4. IBM System x iDataPlex is an innovative data center solution that maximizes performance and optimizes energy and space efficiency. The iDataPlex solution provides customers with outstanding energy and cooling efficiency, multi-rack level manageability, complete flexibility in configuration, and minimal deployment effort. For more information on System x, visit http://ibm.co/Q7m3iQ.
http://www.scribd.com/doc/210744055/IBM-System-x-iDataPlex-dx360-M4
The IBM System x3500 M4 server provides powerful and scalable performance for business applications in an energy efficient tower or rack design. It features the latest Intel Xeon E5-2600 v2 or E5-2600 processors with up to 24 cores, 768GB RAM, 32 hard drives, and 8 PCIe slots. Comprehensive systems management tools and redundant components help ensure high availability, while its small footprint and 80 Plus Platinum power supplies reduce data center costs.
Learn about system specification for IBM System x3550 M4. The x3550 M4 offers numerous features to boost performance, improve scalability, and reduce costs. Improves productivity by offering superior system performance with up to 12-core processors, up to 30 MB of L3 cache, and up to two 8 GT/s QPI interconnect links. For more information on System x, visit http://ibm.co/Q7m3iQ.
Learn about IBM System x3650 M4. The x3650 M4 is an outstanding 2U two-socket business-critical server, offering improved performance and pay-as-you grow flexibility along with new features that improve server management capability. For more information on System x, visit http://ibm.co/Q7m3iQ.
http://www.scribd.com/doc/210741926/IBM-System-x3650-M4
Learn about the product specification of IBM System x3500 M3. System x3500 M3 has an energy-efficient design which works in conjunction with the IMM to govern fan rotation based on the readings that it delivers. This saves money under normal conditions because the fans do not have to spin at high speed. For more information on System x, visit http://ibm.co/Q7m3iQ.
http://www.scribd.com/doc/210741626/IBM-System-x3500-M3
Learn about IBM System x3400 M3. The x3400 M3 offers numerous features to boost performance and reduce costs, x3400 M3 has the ability to grow with your application requirements with these features. Powerful systems management features simplify local and remote management of the x3400 M3. For more information on System x, visit http://ibm.co/Q7m3iQ.
Visit http://on.fb.me/LT4gdu to 'Like' the official Facebook page of IBM India Smarter Computing.
Learn about IBM System 3250 M3 which is a single-socket server that offers new levels of performance and flexibility
to help you respond quickly to changing business demands. Cost-effective and compact, it is well suited to small to mid-sized businesses, as well as large enterprises. For more information on System x, visit http://ibm.co/Q7m3iQ.
http://www.scribd.com/doc/210740347/IBM-System-x3250-M3
Learn about IBM System x3200 M3 and its specifications. The System x3200 M3 features easy installation and management with a rich set of options for hard disk drives and memory. The efficient design helps to save energy and provide a better work environment with less heat and noise. For more information on System x, visit http://ibm.co/Q7m3iQ.
http://www.scribd.com/doc/210739508/IBM-System-x3200-M3
Learn about the configuration of IBM PowerVC. IBM PowerVC is built on OpenStack that controls large pools of server, storage, and networking resources throughout a data center. IBM Power Virtualization Center provides security services that support a secure environment. Installation requires just 20 minutes to get a virtual machine up and running. For more information on Power Systems, visit http://ibm.co/Lx6hfc.
Visit http://on.fb.me/LT4gdu to 'Like' the official Facebook page of IBM India Smarter Computing.
Learn about Ibm POWER7 Virtualization Performance. PowerVM Lx86 is a cross-platform virtualization solution that enables the running of a wide range of x86 Linux applications on Power Systems platforms within a Linux on Power partition without modifications or recompilation of the workloads. For more information on Power Systems, visit http://ibm.co/Lx6hfc.
http://www.scribd.com/doc/210734237/A-Comparison-of-PowerVM-and-Vmware-Virtualization-Performance
This reference architecture document describes deploying the VMware vCloud Enterprise Suite on the IBM PureFlex System hardware platform. Key points:
- The vCloud Suite software provides components for managing and delivering cloud services, while the IBM PureFlex System provides an integrated hardware platform in a single chassis.
- The reference architecture focuses on installing the vCloud Suite management components as virtual machines on an ESXi host to manage consumer resources.
- The IBM PureFlex System provides servers, networking, and storage in a single chassis that can then be easily scaled out. This standardized deployment accelerates provisioning of cloud infrastructure.
- Deployment considerations cover systems management using IBM Flex System Manager, server, networking, storage configurations
Learn how x6: The sixth generation of EXA Technology is fast, agile and Resilient for Emerging Workloads from Alex Yost. Vice President, IBM PureSystems and System x
IBM Systems and Technology Group. x6 drives cloud and big data for enterprises by achieving insight faster thereby outperforming competitors. For more information on System x, visit http://ibm.co/Q7m3iQ.
http://www.scribd.com/doc/210715795/X6-The-sixth-generation-of-EXA-Technology
Lean how Matters Stephen Leonard General Manager Global Markets IBM Systems elucidates the impact of IBM Flex system in businesses which can be instrumental in helping firms to cut their operational down cost. In simple terms “IBM Flex System represents an entirely new generation of technology, with more performance and bandwidth, true integrated enterprise SAN storage.
For more information on Pure Systems, visit http://ibm.co/J7Zb1v.
http://www.scribd.com/doc/210711973/stephen-leonard-ibm-big-data-and-cloud
Infrastructure Matters discusses trends in IT for 2014. It notes the rise of business services, the "Internet of Things" connecting billions of devices, and exponentially growing data. Infrastructure will need to process workloads and massive data quickly in secure environments. Virtualization increases flexibility, utilization, reliability and reduces costs. The role of CIO is expanding from operational roles to innovation, architecture and business transformation. While applications and users grow exponentially, infrastructure demands challenge traditional IT models, increasing the need for third platform technologies.
Learn about vSphere Storage API for Array Integration on the IBM Storwize family. IBM Storwize V7000 Unified combines the block storage capabilities of Storwize V7000 with file storage capabilities into a single system for greater ease of management and efficiency. For more information on IBM Storage Systems, visit http://ibm.co/LIg7gk.
Visit http://bit.ly/KWh5Dx to 'Follow' the official Twitter handle of IBM India Smarter Computing.
Learn about IBM FlashSystem 840 and its complete product specification in this Redbook. FlashSystem 840 provides scalable performance for the most demanding enterprise class applications. IBM FlashSystem 840 accelerates response times with IBM MicroLatency to enable faster decision making. For more information on IBM FlashSystem, visit http://ibm.co/10KodHl.
Visit http://on.fb.me/LT4gdu to 'Like' the official Facebook page of IBM India Smarter Computing.
Learn about the IBM System x3250 M5,.The x3250 M5 offers the following energy-efficiency features to save energy, reduce operational costs, increase energy availability, and contribute to a green environment, energy-efficient planar components help lower operational costs. For more information on System x, visit http://ibm.co/Q7m3iQ.
http://www.scribd.com/doc/210746104/IBM-System-x3250-M5
This Redbook talks about the product specification of IBM NeXtScale nx360 M4. The NeXtScale nx360 M4 server provides a dense, flexible solution with a low total cost of ownership (TCO). The half-wide, dual-socket NeXtScale nx360 M4 server is designed for data centers that require high performance but are constrained by floor space. For more information on System x, visit http://ibm.co/Q7m3iQ.
http://www.scribd.com/doc/210745680/IBM-NeXtScale-nx360-M4
The IBM System x3650 M4 HD is a (1) 2-socket 2U rack-optimized server that supports up to 32 internal drives and features an innovative design for optimal performance, uptime, and dense storage. It offers (2) excellent reliability, availability, and serviceability for improved business environments. The server is (3) designed for easy deployment, integration, service, and management.
Here are the product specification for IBM System x3300 M4. This product can be managed remotely.The x3300 M4 server contains IBM IMM2, which provides advanced service-processor control, monitoring, and an alerting function. The IMM2 lights LEDs to help you diagnose the problem, records the error in the event log, and alerts you to the problem. For more information on System x, visit http://ibm.co/Q7m3iQ.
Visit http://on.fb.me/LT4gdu to 'Like' the official Facebook page of IBM India Smarter Computing.
Learn about IBM System x iDataPlex dx360 M4. IBM System x iDataPlex is an innovative data center solution that maximizes performance and optimizes energy and space efficiency. The iDataPlex solution provides customers with outstanding energy and cooling efficiency, multi-rack level manageability, complete flexibility in configuration, and minimal deployment effort. For more information on System x, visit http://ibm.co/Q7m3iQ.
http://www.scribd.com/doc/210744055/IBM-System-x-iDataPlex-dx360-M4
The IBM System x3500 M4 server provides powerful and scalable performance for business applications in an energy efficient tower or rack design. It features the latest Intel Xeon E5-2600 v2 or E5-2600 processors with up to 24 cores, 768GB RAM, 32 hard drives, and 8 PCIe slots. Comprehensive systems management tools and redundant components help ensure high availability, while its small footprint and 80 Plus Platinum power supplies reduce data center costs.
Learn about system specification for IBM System x3550 M4. The x3550 M4 offers numerous features to boost performance, improve scalability, and reduce costs. Improves productivity by offering superior system performance with up to 12-core processors, up to 30 MB of L3 cache, and up to two 8 GT/s QPI interconnect links. For more information on System x, visit http://ibm.co/Q7m3iQ.
Learn about IBM System x3650 M4. The x3650 M4 is an outstanding 2U two-socket business-critical server, offering improved performance and pay-as-you grow flexibility along with new features that improve server management capability. For more information on System x, visit http://ibm.co/Q7m3iQ.
http://www.scribd.com/doc/210741926/IBM-System-x3650-M4
Learn about the product specification of IBM System x3500 M3. System x3500 M3 has an energy-efficient design which works in conjunction with the IMM to govern fan rotation based on the readings that it delivers. This saves money under normal conditions because the fans do not have to spin at high speed. For more information on System x, visit http://ibm.co/Q7m3iQ.
http://www.scribd.com/doc/210741626/IBM-System-x3500-M3
Learn about IBM System x3400 M3. The x3400 M3 offers numerous features to boost performance and reduce costs, x3400 M3 has the ability to grow with your application requirements with these features. Powerful systems management features simplify local and remote management of the x3400 M3. For more information on System x, visit http://ibm.co/Q7m3iQ.
Visit http://on.fb.me/LT4gdu to 'Like' the official Facebook page of IBM India Smarter Computing.
Learn about IBM System 3250 M3 which is a single-socket server that offers new levels of performance and flexibility
to help you respond quickly to changing business demands. Cost-effective and compact, it is well suited to small to mid-sized businesses, as well as large enterprises. For more information on System x, visit http://ibm.co/Q7m3iQ.
http://www.scribd.com/doc/210740347/IBM-System-x3250-M3
Learn about IBM System x3200 M3 and its specifications. The System x3200 M3 features easy installation and management with a rich set of options for hard disk drives and memory. The efficient design helps to save energy and provide a better work environment with less heat and noise. For more information on System x, visit http://ibm.co/Q7m3iQ.
http://www.scribd.com/doc/210739508/IBM-System-x3200-M3
Learn about the configuration of IBM PowerVC. IBM PowerVC is built on OpenStack that controls large pools of server, storage, and networking resources throughout a data center. IBM Power Virtualization Center provides security services that support a secure environment. Installation requires just 20 minutes to get a virtual machine up and running. For more information on Power Systems, visit http://ibm.co/Lx6hfc.
Visit http://on.fb.me/LT4gdu to 'Like' the official Facebook page of IBM India Smarter Computing.
Learn about Ibm POWER7 Virtualization Performance. PowerVM Lx86 is a cross-platform virtualization solution that enables the running of a wide range of x86 Linux applications on Power Systems platforms within a Linux on Power partition without modifications or recompilation of the workloads. For more information on Power Systems, visit http://ibm.co/Lx6hfc.
http://www.scribd.com/doc/210734237/A-Comparison-of-PowerVM-and-Vmware-Virtualization-Performance
This reference architecture document describes deploying the VMware vCloud Enterprise Suite on the IBM PureFlex System hardware platform. Key points:
- The vCloud Suite software provides components for managing and delivering cloud services, while the IBM PureFlex System provides an integrated hardware platform in a single chassis.
- The reference architecture focuses on installing the vCloud Suite management components as virtual machines on an ESXi host to manage consumer resources.
- The IBM PureFlex System provides servers, networking, and storage in a single chassis that can then be easily scaled out. This standardized deployment accelerates provisioning of cloud infrastructure.
- Deployment considerations cover systems management using IBM Flex System Manager, server, networking, storage configurations
Learn how x6: The sixth generation of EXA Technology is fast, agile and Resilient for Emerging Workloads from Alex Yost. Vice President, IBM PureSystems and System x
IBM Systems and Technology Group. x6 drives cloud and big data for enterprises by achieving insight faster thereby outperforming competitors. For more information on System x, visit http://ibm.co/Q7m3iQ.
http://www.scribd.com/doc/210715795/X6-The-sixth-generation-of-EXA-Technology
Lean how Matters Stephen Leonard General Manager Global Markets IBM Systems elucidates the impact of IBM Flex system in businesses which can be instrumental in helping firms to cut their operational down cost. In simple terms “IBM Flex System represents an entirely new generation of technology, with more performance and bandwidth, true integrated enterprise SAN storage.
For more information on Pure Systems, visit http://ibm.co/J7Zb1v.
http://www.scribd.com/doc/210711973/stephen-leonard-ibm-big-data-and-cloud
Infrastructure Matters discusses trends in IT for 2014. It notes the rise of business services, the "Internet of Things" connecting billions of devices, and exponentially growing data. Infrastructure will need to process workloads and massive data quickly in secure environments. Virtualization increases flexibility, utilization, reliability and reduces costs. The role of CIO is expanding from operational roles to innovation, architecture and business transformation. While applications and users grow exponentially, infrastructure demands challenge traditional IT models, increasing the need for third platform technologies.
Infrastructure Matters 2014 IBM systems and servers
Introduction to Enabling and Developing Java Applications on PowerLinux Servers
1. Industry standard Linux, solutions tuned to the task
Introduction to Enabling and Developing Java Applications
on PowerLinux Servers
January 2013
Authors:
Jason Furmanek, IBM Lab Services, Power and Linux services
Paul Clarke, IBM Lab Services, Power and Linux services
2. Table of Contents
Table of Contents …............................................................................................2
Introduction …....................................................................................................3
Scope of this Paper ….........................................................................................3
Overview of Java and the IBM JVM …..............................................................3
Why Java on PowerLinux? ….............................................................................4
Where to get IBM Java …...................................................................................5
Recommended Java levels for PowerLinux servers ...........................................5
32-bit vs 64-bit …......................................................................................6
How to install IBM Java ….................................................................................6
InstallAnywhere package installation ...........................................................6
Graphical install ......................................................................................7
Console install ........................................................................................7
Unattended install ...................................................................................7
RPM package installation .............................................................................7
Upgrading IBM Java ..........................................................................................7
Uninstalling IBM Java …....................................................................................8
Manual uninstall ...........................................................................................8
Alternative uninstall ......................................................................................8
Common JVM Options and Performance Considerations ….............................8
Prefetching …............................................................................................8
Compressed references …............................................................................9
Garbage collection options ….....................................................................10
Java Heap ...................................................................................................10
Lock reservation ….....................................................................................11
IBM Solution for WebSphere Mobile and Web Applications on PowerLinux .11
Conclusion …...................................................................................................12
Related Content …............................................................................................14
Copyright ….....................................................................................................16
3. Introduction
The Java programming language is a high-level, object-oriented language. Java
programs are both compiled and interpreted. Java code is compiled into bytecode. The
bytecode is then interpreted at run time by a platform-specific Java component. This
component acts as a translator between the language and the underlying operating
system and hardware. This staged approach to compiling and interpreting Java
applications, means that application code can be easily ported across hardware platforms
and operating systems as long as the target systems have the required Java components.
The Java platform is also a set of specifications. These specifications govern the
language, the compilation and interpretation of the language, functions, additions, and
interfaces. IBM was an original licensee of these specifications and a leader in Java
technology, resulting in an IBM implementation of the Java platform.
Scope of this paper
This paper introduces IBM Java on the IBM PowerLinux 7R2 server and describes
IBM's implementation of the Java platform, which includes IBM's Java Virtual Machine
and development toolkit. The primary focus is education and illustration of the Java
platform as they pertain to these systems.
The scope also includes a brief look at some of the Java Virtual Machine options that are
unique to IBM's implementation as well as some basic performance advice for running
IBM Java on IBM PowerLinux servers.
Overview the IBM JVM
The IBM implementation of the Java™ platform provides two installable packages: a
software development toolkit (SDK) and an Java application runtime environment (JRE
). The SDK includes the JRE along with compilers, development tools and integration
libraries that are helpful in the creation of Java programs.
The JRE is also available as a separate package and includes the IBM Java Virtual
Machine, which is the component that interprets the compiler Java bytecode at runtime.
The JRE also includes the Java core class library, the just-in-time compiler (JIT), the
Garbage Collector, and tools that are used to manage and operate the runtime
environment.
The IBM Java Virtual Machine, called J9, was designed for portability and has been
4. released on everything from mobile devices up to the Z-series mainframes, including
IBM PowerLinux servers.
The IBM J9 Virtual Machine for Java is certified as Java compliant. Compliant JVMs
implement the specification completely and correctly, however not all compliant JVMs
are identical.
JVM implementers have a wide degree of freedom to define characteristics that are
beyond the scope of the specification. For example, implementers might choose to favor
performance or memory footprint; they might design the JVM for rapid deployment on
new platforms or for various degrees of serviceability.
The IBM J9 Virtual Machine for Java contains many optimizations and options to take
advantage of the POWER7 processor and is therefore the recommended JVM for
PowerLinux servers.
All the enterprise level JVMs that are currently used commercially include a
supplementary "just-in-time" compiler that takes bytecode and produces platform-
dependent machine code. This compiler works with the JVM to select parts of the Java
program that could benefit from the compilation of bytecode, and replaces the JVM's
virtualized interpretation of these areas of bytecode with concrete code. This is called
just-in-time (JIT) compilation and is the job of the just-in-time compiler included with
the JRE.
Why Java on PowerLinux?
The Java platform has become absolutely ubiquitous and is one of the foundation
technologies of many web and cloud based applications. The Java promise of “Write
Once, Run Anywhere”, realized by the Java Virtual Machine, provides the freedom to
seek the best hardware platform on which to run.
With Java applications having this inherent portability, vastly different platforms can be
evaluated based on merits instead of painful Person-Month porting sizings.
Platforms with heavily optimized JVMs, robust RAS capabilities, unmatched system
virtualization and competitive pricing can be leveraged easier than ever before.
IBM PowerLinux servers are built from the ground up for running Java applications in a
flexible, performance optimized, cloud-ready environment. Leveraging IBM Java
technologies provides access to the wide world of Java-powered applications including
everything from Enterprise-class application servers to Java enabled web servers and
open source system tools. This support coupled with the unique speed enhancement of
5. the IBM J9 Virtual Machine for Java and the enterprise level RAS and virtualization
features of IBM Power Systems make IBM PowerLinux servers the ideal hardware
platform for Java.
Where to get IBM Java
The IBM JRE and SDK packages can be found online at the following website:
http://www.ibm.com/developerworks/java/jdk/linux/download.html
The packages hosted at the above website are InstallAnywhere packages, which use
the .bin extension. These packages replace the .rpm and .tgz packages that were
previously provided. There are two types of InstallAnywhere package, installable and
archive. The installable packages are equivalent to the .rpm packages that were
previously provided and are used for a full product installation. The archive packages
are equivalent to the .tgz packages that were previously provided.
The IBM® Installation Toolkit for PowerLinux also contains packages for the IBM Java
SDK. The IBM® Installation Toolkit is a strategic tool for delivering IBM software
solutions for PowerLinux servers. Depending on release schedules, the toolkit may not
always have the latest Java version included. To get the latest service releases for IBM
Java, getting the packages online is recommended.
Recommended Java levels for PowerLinux servers
Java levels are important since features are introduced in new levels of the JVM and old
APIs may become deprecated. In general, however, Java programs compiled using an
older version of IBM Java should run on newer versions. Java programs compiled with
newer versions of Java are not guaranteed to run on older versions.
The IBM J9 Virtual Machine for Java has its own major build number that is separate
from the Java version number. Both the Java version and the J9 build number are
displayed by using the “java -version” command.
For PowerLinux servers and POWER7 servers in general, Java 6 SR7 or later is
recommended. This recommendation is based on two primary reasons. First, these
versions use 64 KB pages by default for JVM text, data, and stack memory segments as
well as the Java heap. Second, the JIT compiler in Java 6 SR7 and later takes advantage
of POWER7 specific hardware features for performance. Together, these reasons result
in better performance when compared to older releases of the JVM.
6. Java 7 introduced build 2.6 of the IBM J9 Virtual Machine and it contains numerous
performance improvements, making the latest service release of Java 7 the preferred
version of Java to use on PowerLinux servers.
32-bit verses 64-bit
The IBM J9 Virtual Machine for Java comes in both 32-bit and 64-bit versions. Deciding
which to use typically comes down to the characteristics of the Java workload that will
be running in the environment.
Workloads that do not require large amounts of memory typically run faster as 32-bit
applications. This situation occurs because of the larger data types, like 64-bit pointers
instead of 32-bit pointers, which increase the memory footprint and demand on memory
throughput. In addition, the memory alignment of application data contributes to
memory demand in 64-bit applications.
In general, unless the memory requirement of the Java application requires running in
64-bit mode, it is a good idea use the 32-bit IBM Java packages.
How to install IBM Java
The following section discusses the installation of IBM Java packages found either on
the IBM website listed above, or on the IBM Installation Toolkit for PowerLinux. The
IBM Java packages require a few shared libraries to exist on the PowerLinux server
before installation:
◦ GNU C library V2.3 (glibc) or higher
◦ libstdc++.so.5
◦ rpm-build
The libstdc++.so.5 shared library is typically found in the compat-libstdc++-33-
3.2.3*.rpm package found on the Linux operating system distribution media.
The rpm-build package is needed in order to register the Java packages in the RPM
database.
InstallAnywhere package installation
There are two types of InstallAnywhere packages, installable and archive. The
installable packages perform the full product install, while the archive packages only
copy the contents of the package to the destination without executing any installation
7. methods that may be defined.
As mentioned, InstallAnywhere packages have the .bin extension and are executable.
There are a few different methods of interaction with the installer.
Graphical install
If a desktop Graphical User Interface is available on the PowerLinux server and the
install can be attended to, then the installation process can be started by typing
./package.bin at a shell prompt, where package is the name of the package that you are
installing. An installation wizard guides the install until completion.
Console install
If only a command line interface is available on the PowerLinux server and the install
can be attended to, then the installation process can be started by typing ./package.bin -i
console at the shell prompt, where package is the name of the package that you are
installing. The text level wizard guides the install using this method.
Unattended install
If more than one system requires installation, and the installation options to use are
already known, the unattended installation process may save some time. This method
works by installing once by using the attended installation process, then use the resulting
response file to complete further installations without any additional user interaction.
An attended installation that creates a response file can be started by typing
./package.bin -r /path/installer.properties at a shell prompt. The response file will be
created at the path given.
Start an unattended installation by running the package installer with the -i silent option,
and the -f option to specify the response file. For example:
./package.bin -i silent -f /path/installer.properties
RPM installation
Older packages that came as RPMs can be installed like any other RPM. For example:
rpm -ivh ./package.rpm
Upgrading IBM Java
You cannot upgrade an existing IBM® SDK or IBM JRE by using the InstallAnywhere
8. packages. To upgrade your IBM SDK or IBM JRE, you must first uninstall any previous
versions.
Uninstalling IBM Java
There is no uninstallation process for InstallAnywhere archive packages. To remove an
archive package from your system, delete the target directory that you chose when you
installed the package.
For InstallAnywhere installable packages, you uninstall the product by using a
command, or by running the installation program again.
Do not attempt to uninstall the product by using the rpm -e command, because this will
corrupt the installed package.
Manual Uninstall
In order to manually uninstall IBM Java, change to the directory that contains the IBM®
SDK or IBM JRE installation. The default is /opt/ibm/java-<arch>-70/, where <arch> is
either ppc (32-bit) or ppc64 (64-bit).
Start the uninstall process by entering the following command:
./_uninstall/uninstall
Alternative uninstall
Running another attended installation is an alternative to the manual uninstall above.
The installation program detects that the product is already installed, then gives you the
opportunity to uninstall the previous installation.
Common JVM options and performance considerations
The topics below are discuss some specifics to the IBM J9 Virtual Machine for Java that
may be unfamiliar to those that are used to Hotspot-based JVMs. The IBM J9 Virtual
Machine for Java offers a large array of command line options and tuning parameters
beyond the ones discussed below.
Prefetching
Prefetching is a technique that attempts to hide memory latency. It is necessary given the
speed of today's processors compared to the speed of system memory. Without a parallel
9. prefetch of either instructions or data, the processor cores would often stall waiting for
data to arrive. IBM POWER7 implements some prefetching schemes into the hardware
and offers the user ways to control the on-chip function.
Recent versions of Java also include robust support for software prefetching in order to
reduce memory latency and take full advantage of on-chip caches. Software prefetching
in IBM Java is fully tuned and optimized for the POWER7 processors in PowerLinux
servers.
Since it could be disadvantageous to run two differing prefetching schemes, it is
recommended that the hardware data prefetch be disabled when using the Java
prefetching function.
Turning off Hardware data prefetch with the Linux command "ppc64_cpu --dscr=1 "
For IBM Java, the -XtlhPrefetch option can be specified to enable aggressive
prefetching of thread-local heap (TLH) memory shortly before objects are allocated.
This will ensure that the memory required for new objects allocated from the thread-
local heap will be fetched into cache ahead of time if possible, thereby reducing latency
and increasing overall object allocation speed.
This option can give noticeable gains on workloads that frequently allocate objects, such
as transactional workloads.
Compressed references
For truly huge workloads 64-bit JVMs may be necessary to meet an application's needs.
64-bit processes primarily offer a much larger address space, thereby allowing for larger
Java heaps, JIT code caches, and reducing the effects of memory fragmentation in the
native heap.
However 64-bit processes also must deal with the increased overhead. The overhead
comes from the increased memory usage and decreased cache utilization. This overhead
is present with every single object allocation, as each object must now be referred to
with a 64-bit address rather than a 32-bit address. To alleviate this, the
-Xcompressedrefs option can be used.
When enabled, the JVM will use 32-bit references to objects instead of 64-bit references
where ever possible
10. Garbage collection options
The IBM J9 Virtual Machine for Java supports multiple garbage collection strategies in
order to allow software developers an opportunity to prioritize various factors.
Throughput, latency, and scaling are the main factors addressed by the different
collection strategies.
The "optthruput" garbage collection strategy is currently the default. This strategy
prioritizes throughput above all else by using a global garbage collector and restricting
collection to relatively short, well defined periods.
Choosing to use a non-default garbage collection strategy very much depends on the
application's behavior with respect to allocation frequencies, required heap size,
expected lifetime of objects, and other factors.
To specify a non-default garbage collection strategy the -Xgcpolicy:<policy> option can
be used.
Non-default garbage collection strategies include: subpool, optavgpause, and gencon.
The subpool strategy is similar to the optthruput strategy in that it also focuses on
throughput, but also takes into consideration scaling on large multi-CPU machines. The
subpool strategy is recommended on large machines of 16 or more processors.
The optavgpause strategy prioritizes latency and response time by performing the initial
mark phase of garbage collection concurrently with the execution of the application.
This may affect throughput, since CPU time that would otherwise go to the application
may be diverted to low priority GC threads.
The gencon strategy employs a generational garbage collection scheme that attempts to
deal with many varying workloads and memory usage patterns. This GC policy is very
well suited to workloads that have many short-lived objects, such as transactional
workloads.
Java Heap Size
The IBM J9 Virtual Machine for Java includes a dynamic memory heap that allows it to
use only as much memory as necessary at any given time. This flexibility is valuable
but comes with the cost of the overhead associated with memory allocation and freeing.
Options can be set to specify the Java memory heap starting and maximum size (the
-Xms<size><M|G> and -Xmx<size><M|G> options, respectively).
11. Setting the maximum size and the starting size to the same value equates to a constant
sized memory heap, which helps eliminate memory allocation overhead, but is only
recommended for servers running dedicated Java applications and not much else.
The Java heap maximum size should not be set to larger than the physical amount of
memory present; otherwise the operating system may have to swap data in and out of
memory.
Lock reservation
Synchronization and locking are an important part of any multi-threaded application.
Shared resources must be adequately protected by monitors to insure correctness, even if
some resources are only infrequently shared.
If a resource is primarily accessed by a single thread at any given time that thread will
frequently be the only thread to acquire the monitor guarding the resource. In such cases
the cost of acquiring the monitor can be reduced with the -XlockReservation option.
With this option it is assumed that the last thread to acquire the monitor will likely also
be the next thread to acquire it. The lock is therefore said to be reserved for that thread,
thereby minimizing its cost to acquire and release the monitor.
This option is well suited to workloads using many threads and many shared resources
that are infrequently shared in practice.
IBM Solution for WebSphere Mobile and Web Applications on
PowerLinux
IBM WebSphere Application Server is a proven, high-performance transaction engine
that can help build, run, integrate, and manage mobile and dynamic web-based Java
applications. The latest edition of WebSphere Application Server introduces new options
for the development community with the lightweight Liberty profile option and
development tool options.
The WAS Liberty profile option is designed as a dynamic profile of WAS that enables
the WAS server to provision only the features required by the application (or set of
applications) deployed to the server. WAS consists of central "kernel" component and a
large number of features, application bundles, and enterprise APIs. The WAS Liberty
profile makes sure to load only what is needed, which reduces the memory footprint of
WAS as well as accelerates start up times.
12. Additionally, newly utilized features can be enabled and dynamically added without
restarting the server. Operations are enhanced with Intelligent Management capabilities
that minimize end-user outages and maximize operations monitoring and control of the
production environment.
The new development tools option includes WAS Developer Tools for Eclipse(WDT),
which is a lightweight set of tools for the Eclipse IDE used for developing, assembling,
and deploying Java EE, OSGi, Web 2.0, and mobile applications to WebSphere
Application Server. The WDT also includes many of the most common Rational
Application Developer tools that can be added to Eclipse.
IBM Solution for WebSphere Mobile and Web Applications on PowerLinux runs on the
highly secure, resilient, Linux optimized IBM PowerLinux servers, enabling faster time-
to-delivery.
IBM PowerLinux servers have a design that compliments WebSphere Application
Server deployment scenarios. Reliability, availability and serviceability (RAS)
capabilities include recovery from intermittent errors or failover to redundant
components, detection and reporting of failures and impending failures, and self-healing
hardware that automatically initiates actions to effect error correction, repair or
component replacement. In addition, the Processor Instruction Retry feature provides for
the continuous monitoring of processor status with the capability to restart a processor if
certain errors are detected. If required, workloads are redirected to alternate processors,
all without disruption to application execution. The dynamic nature and flexibility of
WAS Liberty profile makes deployment on PowerLinux servers a perfect fit for critical
business applications.
Conclusion
The Java platform on PowerLinux servers is easy to install and re-install as new versions
are released. New function and performance improvements are included in the regular
releases of IBM Java. The included SDK can be leveraged with external tools (see
Related Content), along with the many open source and community tools of choice.
Everything needed to develop world class Java applications is easily accessible.
IBM Solution for WebSphere Mobile and Web Applications on PowerLinux makes IBM
WebSphere Application Server Liberty profile available for PowerLinux servers. This
solution harnesses the strength of IBM hardware and software, improving reliability,
availability and security. It enables rapid mobile and web application development and
is simple to configure and administer, leading to compelling economics on total
solutions costs.
13. The prevalence and portability of Java enables an industry-wide conversation on best
and most capable platforms to run on. The enterprise class features of the PowerLinux
hardware matched with a highly optimized JVM in the IBM J9 Virtual Machine make
PowerLinux 7R2 servers an ideal target for enterprise class Java workloads: industry
standard Java powered by industry standard Linux, tuned to the task from the application
down to the hardware.
14. Related Content
The PowerLinux Community
https://www.ibm.com/developerworks/group/tpl
IBM Redbooks
Performance on POWER
http://www.redbooks.ibm.com/Redbooks.nsf/RedbookAbstracts/sg248079.html?
Open
Websphere Application Server Liberty Profile Guide for Developers
http://www.redbooks.ibm.com/abstracts/sg248076.html?Open
DeveloperWorks – Artcile about Java performance on PowerLinux
http://www.ibm.com/developerworks/wikis/display/LinuxP/Java+Performance+on+PO
WER7
Eclipse - A community driven development IDE for Java
http://www.eclipse.org/
Websphere - Java based service-oriented architecture (SOA) software from IBM
http://www-01.ibm.com/software/websphere/
Webshpere Application Server Developer Tools for Eclipse (WDT)
http://marketplace.eclipse.org/
Rational Application Developer
http://www-142.ibm.com/software/products/us/en/application/
Websphere Development Community
http://www.ibm.com/wasdev
Download page:
https://www.ibm.com/developerworks/mydeveloperworks/blogs/wasdev/entry/download
?lang=en
IBM Java 7 Guide
http://publib.boulder.ibm.com/infocenter/java7sdk/v7r0/index.jsp
IBM Java 6 Guide
http://publib.boulder.ibm.com/infocenter/javasdk/v6r0/index.jsp