By: Jenifer Hopper This article discusses some basic XML tuning tips for PowerKVM guests. It helps new users get started with editing guest XML definitions, and walks through some simple tuning examples. The article covers various options to tune the guest disk, network, cpu, and memory. It also includes some example guest resource pinning configurations for different scenarios. Applying these tips may help improve application performance by ensuring your guest is configured properly and optimized for the KVM environment.
By: Jenifer Hopper
Are you interested in better understanding memory access performance? A new article, Untangling memory access measurements - memory latency explains how to use an example benchmark called lat_mem_rd to measure memory read latency on IBM® Power Systems™ servers running Linux. This article takes a practical approach to measuring memory latency performance, from understanding initial results to moving on to examining the effects of more in-depth system settings and... [More]
Ron Gordon, Director, Power Systems firstname.lastname@example.org Use In-Memory Database to Remove the IO Bottleneck Many customers today have experienced significant growth in customer interaction via social, mobile or web processes. With the increase of transactions, all requiring database access for both retrieval and updating, comes the problem of decreased response time from the storage device, and the corresponding possibility of customer and user dissatisfaction. Performance used to be the function of many... [More]
At Impact 2014, Doug Balog and Mark Shuttleworth provided a glimpse of the work completed on POWER8 systems with Ubuntu 14.04 from Canonical. In a Keynote presentation available on Youtube , Mark Shuttleworth's team does a demo of deploying 8 KVM guests - starting from scratch, installing the OS on each guest, the application software, configuring, running, inter-connecting, and ready for work. JuJu's and Charms are actually pretty slick. Something good to learn in the coming days. On the Youtube video, fast forward... [More]
System Backup for IBM PowerLinux By: Bill Buros. Thought I'd take a minute to post a quick pointer to a system backup product that can be used on Power systems running Linux - the Storix System Backup Administrator (SBAdmin) . It's good to see a product specifically targeted at our PowerLinux customers!
By: Wainer dos Santos Moschetta. As of Version 1.2, the IBM SDK for PowerLinux comes with IBM Java 6 SDK required to run the Eclipse instance. Users sometimes ask me how they can change JVM (Java Virtual Machine) parameters according to their specific needs (e.g. increase jvm heap size due to big projects being imported into the SDK). Here is an answer: The JVM parameters are defined in the following file where any options under -vmargs will be passed to the JVM. /opt/ibm/ibm-sdk-lop/sdk_launcher.ini Here is an example of... [More]
By: Anibal Carvalho . One of the
main new features of IBM® Installation Toolkit for PowerLinux version
5.3 is the support for facilitating Linux installations, on top of multipath devices. Multipath I/O Linux layers can be enabled on IBM PowerLinux servers with multiple physical paths to storage devices (through SANs or direct attached), where they can be used to increase storage path redundancy, as well as to enhance server performance though typical features, such as: Dynamic load balancing Traffic shaping Automatic path management... [More]
With the OpenPOWER Summit wrapped up, there is an amazing list of initial accomplishments and progress around the POWER ecosystem, across servers, processors, accelerators, and software. For a quick summary of these accomplishments, check out the OpenPOWER Summit Fact Sheet on the Expanding Ecosystem.
By: Tulio Magno Quites Machado Filho The IBM Advance Toolchain for PowerLinux repositories are moving to a new host. Users of the IBM POWER Linux Tools Repository will be automatically moved to the new repositories and don't need to change their environments. But users that have manually configured the old repositories need to add the new ones in order to keep receiving updates of the Advance Toolchain. It isn't necessary to remove the old repositories yet. The steps to manually setup the new repositories are described with details in... [More]
By: Paul Clarke. The IBM Power processor family has a somewhat hidden little gem which, when exploited, could yield signficant performance improvements. IBM Power processors have a vector processing facility (known as AltiVec, VMX, and VSX in different incantations) which can perform multiple computations with a single instruction, also known as SIMD (single instruction, multiple data). POWER8 has 64 "vector-scalar registers' (VSRs), the first 32 of which are shared space with the 32 floating point registers. Each VSR... [More]
This has been a great week for Power Systems, especially if you’re fan of the 1-2 socket (scale-out) side of the portfolio and innovative technology that leverages Linux. I just returned from our annual Enterprise conference, an event we do every fall to bring together clients and partners with our SMEs to explore the latest developments in infrastructure. Major announcements were made by System z, Storage, and Power Systems. I also had a couple of sessions at the conference, and was excited to talk about some of these new... [More]
By: Robert MacFarlan. IBM, in collaboration with the Open Source Lab at Oregon State University, has contributed access to a new POWER7 server for use by the GCC development community. Quoting the email list announcement the configuration looks like: "The server is an IBM Power 730 Express server configured with 16 POWER7 cores
each with 4 hardware threads at 3.55 GHz, 64 GB of RAM and a few TB of disk.
It is running Fedora Core 16 alpha." Check out the recent blog posting on Fedora 16 Alpha for ppc64. The GCC Community... [More]
By: Brent Baude. Fedora has made their alpha release for Fedora 17 on ppc64 available. The release notes are publicly available and describe where to get the content (.iso). If you are familiar with the Fedora, please make sure you read the release notes because the initial loading of the installation image is significantly different than past releases and impacts things like network-based install. Fedora 17 is the second release for the ppc64 architecture and is proving to be quite stable. Feel free to grab a copy and give it a try. ... [More]
I am excited to announce the availability of the next generation of the Power Architecture. The next generation of the Power Architecture heralds a new era for systems. The new Power Instruction Set Architecture 3.0 (Power ISA 3.0) marks the first generation of architecture developed and released since the creation of the OpenPOWER Foundation, and sustains the growth of OpenPOWER as an open ecosystem built around collaborative innovation. Marking this new era, the new Power 3.0 architecture reflects the values of our open ecosystem by... [More]
By: Bill Buros. Saw this over on the IBM Research blog. Very nice! The IBM Power 775 is an amazing server. In this publish, Redhat Linux Version 6.2 is used. IBM’s Power 775 wins recent HPC Challenge Starting out as a government project 10 years ago, IBM Research’s high performance computing project, PERCS (pronounced “perks”), led to one of the world’s most powerful supercomputers, the Power 775. This July, the Power 775 continued to prove its power by earning the top spot in a series of benchmark components of the HPC Challenge... [More]