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  • Blockbuster Time Machine

    - by David Dorf
    In another example of clinging to the core business much too long, DISH announced its closing the remaining 300 Blockbuster stores.  This reminds us that we must always be looking over our shoulders for the next big thing.  Blockbuster had the opportunity to buy Netflix, but it passed just as Barnes & Noble decided it didn't need to partner with Amazon.  Its so tempting to stick with a profitable business instead of taking a risk on a new idea.  Nevertheless, Blockbuster is history -- and this video from The Onion seals it. Historic ‘Blockbuster’ Store Offers Glimpse Of How Movies Were Rented In The Past

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  • Belgrade Open Source Software Development Center

    - by Tori Wieldt
    A new Open Source Software Development Center is open at University of Belgrade Serbia. It centers around using Java & NetBeans as open source projects to learn from and contribute to. Assistant Professor Zoran Sevarac says that not only does the center allow him to teach software development using open source projects, but also "we are improving our University courses based on the experience we get from working on open source code."  Some of the projects underway are a NetBeans UML plugin; Neuroph (a Java neural network framework, with a NetBeans Platform-based UI); a NetBeans DOAP Plugin; WorkieTalkie (NetBeans chat plugin); and 2D and 3D visualization plugins for NetBeans. Here's video describing the NetBeans UML plugin: University of Belgrade also has an official university course about open source development, where students learn to use development tools, work in teams, participate in open source projects and learn from real world software development projects. Students, teachers, and researchers at the University of Belgrade, and any member of the open source community are welcome to come to learn software development from successful open source projects. For more information, you can contact Zoran Sevarac (@neuroph on Twitter). 

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  • C++11 Tidbits: Decltype (Part 2, trailing return type)

    - by Paolo Carlini
    Following on from last tidbit showing how the decltype operator essentially queries the type of an expression, the second part of this overview discusses how decltype can be syntactically combined with auto (itself the subject of the March 2010 tidbit). This combination can be used to specify trailing return types, also known informally as "late specified return types". Leaving aside the technical jargon, a simple example from section 8.3.5 of the C++11 standard usefully introduces this month's topic. Let's consider a template function like: template <class T, class U> ??? foo(T t, U u) { return t + u; } The question is: what should replace the question marks? The problem is that we are dealing with a template, thus we don't know at the outset the types of T and U. Even if they were restricted to be arithmetic builtin types, non-trivial rules in C++ relate the type of the sum to the types of T and U. In the past - in the GNU C++ runtime library too - programmers used to address these situations by way of rather ugly tricks involving __typeof__ which now, with decltype, could be rewritten as: template <class T, class U> decltype((*(T*)0) + (*(U*)0)) foo(T t, U u) { return t + u; } Of course the latter is guaranteed to work only for builtin arithmetic types, eg, '0' must make sense. In short: it's a hack. On the other hand, in C++11 you can use auto: template <class T, class U> auto foo(T t, U u) -> decltype(t + u) { return t + u; } This is much better. It's generic and a construct fully supported by the language. Finally, let's see a real-life example directly taken from the C++11 runtime library as implemented in GCC: template<typename _IteratorL, typename _IteratorR> inline auto operator-(const reverse_iterator<_IteratorL>& __x, const reverse_iterator<_IteratorR>& __y) -> decltype(__y.base() - __x.base()) { return __y.base() - __x.base(); } By now it should appear be completely straightforward. The availability of trailing return types in C++11 allowed fixing a real bug in the C++98 implementation of this operator (and many similar ones). In GCC, C++98 mode, this operator is: template<typename _IteratorL, typename _IteratorR> inline typename reverse_iterator<_IteratorL>::difference_type operator-(const reverse_iterator<_IteratorL>& __x, const reverse_iterator<_IteratorR>& __y) { return __y.base() - __x.base(); } This was guaranteed to work well with heterogeneous reverse_iterator types only if difference_type was the same for both types.

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  • 20 Jahre Solaris - 25 Jahre SPARC!

    - by Stefan Hinker
    Normalerweise wiederhole ich ja nicht einfach das, was woanders schon steht.  Hier mache ich eine Ausnahme... 20 Jahre Solaris - Und wer hat die ganzen Innovationspreise bekommen?25 Jahre SPARC - und kein bisschen muede :-) Wie die Geschichte weiter geht, steht ganz unten auf diesen Seite - also schnell nachsehen... Und wer's lieber als Video mag: 20 Jahre Solaris - 25 Jahre SPARC (Kaum zu glauben, ich habe nur die ersten 4 Jahre von Solaris "verpasst".  Die Zeit vergeht wohl doch...)

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  • ADF is YouTubed

    - by Chris Muir
    A blog post along the lines of "your wishes are our command". ADF developers are hopefully aware of our ADF Insider Essentials recordings, a page full of presentations from small to large topics on all-things-ADF.  A couple of customers have pointed out these recordings aren't accessible via the iPad and other Apple OSX devices thanks to the recordings being wrapped in an Adobe Flash applet. To satisfy this need we've now uploaded all of the videos as MP4s to our ADF Insider Essentials YouTube channel for your iPad viewing pleasure.  So now regardless if you're sitting at your PC or on the couch with your iPad, you can enjoy my horrible Aussie accent amongst the more professional ADF presentations from my colleagues ;-) Make sure to subscribe to the YouTube channel to receive notifications of newly uploaded content. 

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  • Virtual Developer Day - EMEA-friendly time

    - by Tori Wieldt
    OTN's Virtual Developer Day lets you learn about the latest technical improvements in Java without leaving your desk/couch/park bench. Watch informative tutorials on your laptop and improve your Java programming expertise and engage in live chat sessions with Java experts, all for FREE.  OTN Virtual Developer Day: Java Europe/Africa/Middle East - June 25 09:00 to 13:00 BST / 10:00 to 14:00 CEST / 13:30 to 17:30 IST / 12:00 to 16:00 MSK / 08:00 to 12:00 Corresponding UTC (GMT) After a short keynote, you can dive into one of these three tracks:  Java SE 8 Track Learn about the features scheduled for Java SE 8, including Lambda expressions, extension methods for interfaces and a new Date and Time API. Learn how to create basic apps with JavaFX.  Java EE Track Take a close look at the new functionality in Java EE 7. Get presentations and demos on JSON, WebSockets, Batch, Concurrency, JAX-RS 2, JMS 2,  Java Embedded Track Provides an introductions to the Raspberry Pi, the Keil board, ARM architecture, and how to make it all work with Java Embedded. You know Java, now really know Java. Register now!

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  • 4 Ways Your Brand Can Jump From the Edge of Space

    - by Mike Stiles
    Can your brand’s social media content captivate the world and make it hold its collective breath? Can you put something on the screen that’s so compelling that your audience can’t look away? Will they want to make sure their friends see it so they can talk about it? If not, you’re probably not with Red Bull. I was impressed with Red Bull’s approach to social content even before Felix Baumgartner’s stunning skydive from the edge of space. And then they did this. According to Visible Measures, videos of the jump scored 50 million views in 4 days. 1,700 clips were generated from both official and organic sources. The live stream was the most watched YouTube Stream of all time (8 million concurrent viewers). The 2nd most watched live stream was…Felix’ first attempt Oct. 9. Are you ready to compete with that? I ask that question because some brands are still out there tying themselves up in knots about whether or not they should tweet. The public’s time and attention are scarce commodities, commodities they value greatly. The competition amongst brands for that time and attention is intense and going up like Felix’s capsule. If you still view your press releases as “content,” you won’t even be counted as being among the competition. Here are 5 lessons learned from Red Bull’s big leap: 1. They have a total understanding of their target market and audience. Not only do they have an understanding of it, they do something about it. They act on it. They fill the majority of their thoughts with what the audience wants. They hunger for wild applause from that audience. They want to do things that embrace the audience’s lifestyle and immerse in it so the target will identify the brand as “one of them.” Takeaway: BE your target market. 2. They deliver content that strikes the audience right where they emotionally live. If you want your content to have impact, you have to make your audience’s heart race, or make them tear up, or make them laugh. Label them “data points” all you want, but humans are emotional creatures. No message connects that’s not carried in on an emotion. Takeaway: You’re on the inside. If your content doesn’t make you say “wow,” it’s unlikely it will register with fans. 3. They put aside old school marketing and don’t let their content be degraded into a commercial. Their execs seem to understand the value in keeping a lid on the hard sell. So many brands just can’t bring themselves to disconnect advertising and social content. The result is, otherwise decent content gets contaminated with a desperation the viewer can smell a mile away. Think the Baumgartner skydive didn’t do Red Bull any good since he wasn’t drinking one on the way down while singing a jingle? Analysis company Taykey discovered that at the peak of the skydive buzz, about 1% of all online conversation was about the jump. Mentions of Red Bull constituted 1/3 of 1% of all Internet activity. Views of other Red Bull videos also shot up. Takeaway: Chill out with the ads. Your brand will get full credit for entertaining/informing fans in a relevant way, provided you do it. 4. They don’t hesitate to ask, “What can we do next”? Most corporate cultures are a virtual training facility for “we can’t do that.” Few are encouraged to innovate or think big, if think at all. Thinking big involves faith, and work. It means freedom and letting employees run a little wild with their ideas. There will always be the opportunity to let fear of everything that moves creep in and kill grand visions dead in their tracks. Experimenting must be allowed. Failure must be allowed. Red Bull didn’t think big. They thought mega. They tried to outdo themselves. Felix could have gone ahead and jumped halfway up, thinking, “This is still relatively high up. Good enough.” But that wouldn’t have left us breathless. Takeaway: Go for it. Jump. In putting up social properties and gathering fans of your brand, you’ve basically invited people to a party. A good host doesn’t just set out warm beer and stale chips because that’s inexpensive and easy. Be on the lookout for ways to make your guests walk away saying, “That was epic.”

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  • Solaris 11 JDK installation

    - by user20121221
    JAVA -JDK install on Solaris 11 pkg list -s jdk-7 pkg install jdk-7 ls /usr/jdk/instances jdk1.5.0 jdk1.6.0 mv jdk1.7.0_07 /usr/jdk/instances/jdk1.7.0 ls -l total 9 drwxr-xr-x 5 root bin 5 Sep 4 16:08 instances lrwxrwxrwx 1 root root 18 Jul 14 11:11 jdk1.6.0_26 -> instances/jdk1.6.0 lrwxrwxrwx 1 root root 8 Sep 4 16:09 latest -> jdk1.6.0 drwxr-xr-x 4 root bin 4 Jul 14 11:04 packages rm latest ln -s instances/jdk1.7.0 jdk1.7.0_07 ln -s jdk1.7.0_07 latest cd /usr/ ls -ld java lrwxrwxrwx 1 root root 12 Sep 4 16:12 java -> jdk/jdk1.6.0 rm java ln -s jdk/latest java java -version java version "1.7.0_07"Java(TM) SE Runtime Environment (build 1.7.0_07-b10)Java HotSpot(TM) Server VM (build 23.3-b01, mixed mode) stop firefox cd /usr/lib/firefox/plugins rm libnpjp2.so ln -s /usr/jdk/jdk1.7.0_07/jre/lib/i386/libnpjp2.so libnpjp2.so start firefox

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  • Bring 2 GB Large Pages to Solaris 10

    - by Giri Mandalika
    Few facts: 8 KB is the default page size on Oracle Solaris 10 and 11 as of this writing Both hardware and software must have support for 2 GB large pages SPARC T4 processors are capable of supporting 2 GB pages Oracle Solaris 11 kernel has in-built support for 2 GB pages Oracle Solaris 10 has no default support for 2 GB pages Memory intensive 64-bit applications may benefit the most from using 2 GB pages Prerequisites: OS: Oracle Solaris 10 8/11 (Update 10) or later Hardware: Oracle servers with SPARC T4 processors e.g., SPARC T4-1, T4-2 or T4-4, SPARC SuperCluster T4-4 Steps to enable 2 GB large pages on Oracle Solaris 10: Install the latest kernel patch or ensure that 147440-04 or later was installed Check the patch download instructions Add the following line to /etc/system and reboot set max_uheap_lpsize=0x80000000 Finally check the output of the following command when the system is back online pagesize -a eg., % pagesize -a 8192 <-- 8K 65536 <-- 64K 4194304 <-- 4M 268435456 <-- 256M 2147483648 <-- 2G % uname -a SunOS jar-jar 5.10 Generic_147440-21 sun4v sparc sun4v Also See: Solaris 9 or later: More performance with Large Pages (MPSS) Large page support for instructions (text) in Solaris 10 1/06 Solaris: How To Disable Out Of The Box (OOB) Large Page Support? Memory fragmentation / Large Pages on Solaris x86

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  • PCI Compliance Book Suggestion

    - by Joel Weise
    I am always looking for good books on security, compliance and of course, PCI.  Here is one I think you will find very useful. "PCI Compliance, Third Edition: Understand and Implement Effective PCI Data Security Standard Compliance" by Branden Williams and Anton Chuvakin.  [Fair disclosure - Branden and I work together on the Information Systems Security Association Journal's editorial board.]   The primary reason I like this book is that the authors take a holistic architectural approach to PCI compliance and that to me is the most safe and sane way to approach PCI.  Using such an architectural approach to PCI is, in my humble opinion, the underlying intent of PCI.  Don't create a checklist of the PCI DSS and then map a solution to each.  That is a recipe for disaster.  Instead, look at how the different components and their configurations work together in a synergistic fashion.  In short, create a security architecture and governance framework (the ISO 27000 series is a good place to start) that begins with an evaluation of the requirements laid down in the PCI DSS, as well as your other applicable compliance, business and technical requirements.  By developing an integrated security architecture you should be able to not only address current requirements, but also be in a position to quickly address future ones as well.

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  • Cross-Channel Survey Report

    - by David Dorf
    The folks at Retail Touchpoints surveyed 84 retailers on the topic of cross-channel and have published the results in Completing the Cross-Channel Challenge.  Below is an overview video that summarizes the findings and cites retailer examples. One thing is clear: customers demand Commerce Anywhere, the ability to shop when, where, and the way they want.  So retailers are doing what it takes to revamp their business to meet their customers' demands.

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  • Siebel 2012-IP Release is now GA

    - by Richard Lefebvre
    The Siebel development team is pleased to announce the general availability of the highly anticipated 2012 Siebel Innovation Pack on 12/12/2012. The journey began last year as a concept at Open World that invigorated the Siebel customer base and partners across the globe, culminating in this 2012-IP release that delivers much valued usability enhancements on an existing release. Open UI and Siebel Mobile are the key innovations that are released as part of the 2012-IP on both 8.1.1.9 and the 8.2.2.2 releases. These innovations are a giant leap forward in facilitating Siebel usability while supporting multiple browsers and devices. Siebel Mobile released as part of the IP provide connected Mobile solutions that support key Horizontal Sales, Field Service, Life Sciences and Consumer Goods flows. See the Siebel Open UI Dada Sheet here.

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  • What file manager/uploader do you use with your embeded wysiwyg editor ?

    - by Wookai
    I am looking for a wysiwyg editor to allow user to edit part of their website. I already worked with TinyMCE, and heard about CKEditor, which both look great. However, they both lack a free (PHP) file manager/uploader, as they sell their own tool to make some money. I found a few free alternatives for TinyMCE, the best one (for my needs) being PHP Letter's one, but I was wondering about what the community uses ? Do you buy the "official" file manager ? Do you code your own ? Or do you have a great (free) alternative ?

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  • Recording Available - Features and Functions Payments Module

    - by MHundal
    The Payments Module recording provides a high-level overview of Payments Processing in ETPM.  The recording discusses the Payments Data Model, including Payment Events, Tenders, Tender Control, Deposit and Deposit Control.  In addition, there is a product demonstration of payment processing in the system. Payments Module Overview:  https://oracletalk.webex.com/oracletalk/ldr.php?AT=pb&SP=MC&rID=67364002&rKey=9fe755e4f41a2d4d

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  • COLLABORATE 13 Call for Papers

    - by Marc Weintraub
    Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 Attention PeopleSoft customers!  Speak at the largest user-led PeopleSoft conference of the year and attend for free! Interested in submitting a presentation for COLLABORATE 13? October 12 is the deadline to submit your abstract. The COLLABORATE 13- Quest forum is your home for high-level education sessions around PeopleSoft. Presenting doesn’t just mean giving a solo lecture: you can present with a vendor, give a demonstration (internet will be provided), facilitate a hot topic discussion or even offer best practices from an experience your company has been through. Remember, to submit an abstract now, all you need is a short description of your presentation. Think you don't have a story to tell? Think again! Check out the COLLABORATE 13- Quest forum now to better understand what we are looking for. A selection committee of other PeopleSoft users will review all sessions and select the most relevant, customer-focused sessions possible to make COLLABORATE a great learning experience for everyone. Don't forget, one speaker from each session selected will be eligible to receive a complimentary registration to the entire event *some rules apply. Also, don’t forget to include your functional counterpart. The selection committee is looking to increase the amount of functional users attending and want to help them glean the most out of the event. Thank you for your time and please let the selection committee know if you have any questions about submitting a presentation. We look forward to seeing you at COLLABORATE 13 in Denver! Quest's COLLABORATE '13 website - http://www.questdirect.org/collaborate /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}

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  • Why does tomcat-admin install require adding admin and manager to tomcat-users.xml manually?

    - by J G
    I installed tomcat6 on lucid using apt-get. All working. I installed tomcat-admin. Not working. I amended the /etc/tomcat6/tomcat-users.xml file to uncomment the users and roles (from the default) to be like the following: <role rolename="tomcat"/> <role rolename="role1"/> <user username="tomcat" password="password" roles="tomcat"/> <user username="both" password="password" roles="tomcat,role1"/> <user username="role1" password="password" roles="role1"/> This still didn't work. Then from the following page I added. <role rolename="manager"/> <user username="admin" password="secret" roles="manager"/> then it worked. Why doesn't this occur as part of the install? (Why isn't this in the Ubuntu Manual on Tomcat ?)

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  • Chargeback and billing across public and private clouds

    - by llaszews
    Had a great conversation today regarding the need for metering, chargeback, and billing of cloud computing resources. The person I spoken with at a Fortune 1000 company increased the scope and magnitude of the issue of billing for cloud computing resources beyond what I had previously considered. I believed that doing any type of chargeback and billing for one public, private or hybrid installation was difficult. This person pointed out that the problem is even bigger in scope. The reality is many companies are using multiple public cloud vendors and have many different private cloud data centers. A customer may use AWS for some smaller public cloud applications, Salesforce.com (SaaS), Rackspace for IaaS, Savvis for colocation and a variety of Iaas and PaaS implementations for the private cloud. How does a company get a consolidated bill for all these different cloud environments? I am not sure their is an answer right now.

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  • Minimal Fedora Installation

    - by MA1
    I am working on a Fedora 13 minimal iso image with no Desktop environment. I just need wxPython support. I removed the gnome from kickstart and build the iso image using livecd-creator. But now my application is not loading as gnome is gone. Earlier my application(myapp.desktop) was placed in /usr/share/gnome/autostart/ and starts automatically. So what should i do now the run my application? To run my wxPython appalication should i have to install display manager(xdm, gdm, kdm etc..)? If i install gdm, it takes lots of space. what should i do? In short i need Fedora 13 minimal iso image with no desktop environment and with wxPython support.

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  • Social Engagement: One Size Doesn't Fit Anyone

    - by Mike Stiles
    The key to achieving meaningful social engagement is to know who you’re talking to, know what they like, and consistently deliver that kind of material to them. Every magazine for women knows this. When you read the article titles promoted on their covers, there’s no mistaking for whom that magazine is intended. And yet, confusion still reigns at many brands as to exactly whom they want to talk to, what those people want to hear, and what kind of content they should be creating for them. In most instances, the root problem is brands want to be all things to all people. Their target audience…the world! Good luck with that. It’s 2012, the age of aggregation and custom content delivery. To cope with the modern day barrage of information, people have constructed technological filters so that content they regard as being “for them” is mostly what gets through. Even if your brand is for men and women, young and old, you may want to consider social properties that divide men from women, and young from old. Yes, a man might find something in a women’s magazine that interests him. But that doesn’t mean he’s going to subscribe to it, or buy even one issue. In fact he’ll probably never see the article he’d otherwise be interested in, because in his mind, “This isn’t for me.” It wasn’t packaged for him. News Flash: men and women are different. So it’s a tall order to craft your Facebook Page or Twitter handle to simultaneously exude the motivators for both. The Harris Interactive study “2012 Connecting and Communicating Online: State of Social Media” sheds light on the differing social behaviors and drivers. -65% of women (vs. 59% of men) stay glued to social because they don’t want to miss anything. -25% of women check social when they wake up, before they check email. Only 18% of men check social before e-mail. -95% of women surveyed belong to Facebook vs. 86% of men. -67% of women log in to Facebook once a day or more vs. 54% of men. -Conventional wisdom is Pinterest is mostly a woman-thing, right? That may be true for viewing, but not true for sharing. Men are actually more likely to share on Pinterest than women, 23% to 10%. -The sharing divide extends to YouTube. 68% of women use it mainly for consumption, as opposed to 52% of men. -Women are as likely to have a Twitter account as men, but they’re much less likely to check it often. 54% of women check it once a week compared to 2/3 of men. Obviously, there are some takeaways from this depending on your target. Women don’t want to miss out on anything, so serialized content might be a good idea, right? Promotional posts that lead to a big payoff could keep them hooked. Posts for women might be better served first thing in the morning. If sharing is your goal, maybe male-targeted content is more likely to get those desired shares. And maybe Twitter is a better place to aim your male-targeted content than Facebook. Some grocery stores started experimenting with male-only aisles. The results have been impressive. Why? Because while it’s true men were finding those same items in the store just fine before, now something has been created just for them. They have a place in the store where they belong. Each brand’s strategy and targets are going to differ. The point is…know who you’re talking to, know how they behave, know what they like, and deliver content using any number of social relationship management targeting tools that meets their expectations. If, however, you’re committed to a one-size-fits-all, “our content is for everybody” strategy (or even worse, a “this is what we want to put out and we expect everybody to love it” strategy), your content will miss the mark for more often than it hits. @mikestilesPhoto via stock.schng

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  • Data Source Connection Pool Sizing

    - by Steve Felts
    Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman","serif";} One of the most time-consuming procedures of a database application is establishing a connection. The connection pooling of the data source can be used to minimize this overhead.  That argues for using the data source instead of accessing the database driver directly. Configuring the size of the pool in the data source is somewhere between an art and science – this article will try to move it closer to science.  From the beginning, WLS data source has had an initial capacity and a maximum capacity configuration values.  When the system starts up and when it shrinks, initial capacity is used.  The pool can grow to maximum capacity.  Customers found that they might want to set the initial capacity to 0 (more on that later) but didn’t want the pool to shrink to 0.  In WLS 10.3.6, we added minimum capacity to specify the lower limit to which a pool will shrink.  If minimum capacity is not set, it defaults to the initial capacity for upward compatibility.   We also did some work on the shrinking in release 10.3.4 to reduce thrashing; the algorithm that used to shrink to the maximum of the currently used connections or the initial capacity (basically the unused connections were all released) was changed to shrink by half of the unused connections. The simple approach to sizing the pool is to set the initial/minimum capacity to the maximum capacity.  Doing this creates all connections at startup, avoiding creating connections on demand and the pool is stable.  However, there are a number of reasons not to take this simple approach. When WLS is booted, the deployment of the data source includes synchronously creating the connections.  The more connections that are configured in initial capacity, the longer the boot time for WLS (there have been several projects for parallel boot in WLS but none that are available).  Related to creating a lot of connections at boot time is the problem of logon storms (the database gets too much work at one time).   WLS has a solution for that by setting the login delay seconds on the pool but that also increases the boot time. There are a number of cases where it is desirable to set the initial capacity to 0.  By doing that, the overhead of creating connections is deferred out of the boot and the database doesn’t need to be available.  An application may not want WLS to automatically connect to the database until it is actually needed, such as for some code/warm failover configurations. There are a number of cases where minimum capacity should be less than maximum capacity.  Connections are generally expensive to keep around.  They cause state to be kept on both the client and the server, and the state on the backend may be heavy (for example, a process).  Depending on the vendor, connection usage may cost money.  If work load is not constant, then database connections can be freed up by shrinking the pool when connections are not in use.  When using Active GridLink, connections can be created as needed according to runtime load balancing (RLB) percentages instead of by connection load balancing (CLB) during data source deployment. Shrinking is an effective technique for clearing the pool when connections are not in use.  In addition to the obvious reason that there times where the workload is lighter,  there are some configurations where the database and/or firewall conspire to make long-unused or too-old connections no longer viable.  There are also some data source features where the connection has state and cannot be used again unless the state matches the request.  Examples of this are identity based pooling where the connection has a particular owner and XA affinity where the connection is associated with a particular RAC node.  At this point, WLS does not re-purpose (discard/replace) connections and shrinking is a way to get rid of the unused existing connection and get a new one with the correct state when needed. So far, the discussion has focused on the relationship of initial, minimum, and maximum capacity.  Computing the maximum size requires some knowledge about the application and the current number of simultaneously active users, web sessions, batch programs, or whatever access patterns are common.  The applications should be written to only reserve and close connections as needed but multiple statements, if needed, should be done in one reservation (don’t get/close more often than necessary).  This means that the size of the pool is likely to be significantly smaller then the number of users.   If possible, you can pick a size and see how it performs under simulated or real load.  There is a high-water mark statistic (ActiveConnectionsHighCount) that tracks the maximum connections concurrently used.  In general, you want the size to be big enough so that you never run out of connections but no bigger.   It will need to deal with spikes in usage, which is where shrinking after the spike is important.  Of course, the database capacity also has a big influence on the decision since it’s important not to overload the database machine.  Planning also needs to happen if you are running in a Multi-Data Source or Active GridLink configuration and expect that the remaining nodes will take over the connections when one of the nodes in the cluster goes down.  For XA affinity, additional headroom is also recommended.  In summary, setting initial and maximum capacity to be the same may be simple but there are many other factors that may be important in making the decision about sizing.

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  • Setting MTU on Exalogic

    - by csoto
    For many reasons, a system administrator may want to change the MTU settings of a server. But in a system like Exalogic which contains lots of interconnected nodes and other various components, it's important to understand how this applies to the different networks. For example, when bringing up bonding of InfiniBand an error like the following may be thrown: Bringing up interface bond1: SIOCSIFMTU: Invalid argument Both scripts ifcfg-ib0 and ifcfg-ib1 (from the /etc/sysconfig/network-scripts/ direectory) have MTU set to 65500, which is a valid MTU value only if all IPoIB slaves operate in connected mode and are configured with the same value, so the line below must be added to both network scripts and then restart the network: CONNECTED_MODE=yes By the way, an error of the form “SIOCSIFMTU: Invalid argument” indicates that the requested MTU was rejected by the kernel. Typically this would be due to it exceeding the maximum value supported by the interface hardware. In that case you must either reduce the MTU to a value that is supported or obtain more capable hardware. This problem has been seen when trying to modify the MTU using the ifconfig command, like the output of the example below: [root@elxxcnxx ~]# ifconfig ib1 mtu 65520 SIOCSIFMTU: Invalid argument It's important to insist that in most cases the nodes must be rebooted after the MTU size has been changed. Although in some circumstances it may work without a reboot, it is not how it is typically documented. Now, in order to achieve a reduced memory consumption and improve performance for network traffic received on IPoIB related interfaces, it is recommend to reduce the MTU value in interface configuration files for IPoIB related bonds from 65520 to 64000. The change needs to be made to interface configuration files under the /etc/sysconfig/network-scripts directory and applies to the interface configuration files for bonds over IPoIB related slave devices, for example /etc/sysconfig/network-scripts/ifcfg-bond1. However, keep in mind that the numeric portion of the interface filenames that corresponding to IPoIB interfaces is expected to vary across compute nodes and vServers and so cannot be relied upon to identify which interface files are for bonds are over IPoIB rather than EoIB related slave interfaces. To fix these MTU values to the recommended settings, there are very useful instructions and a script on the MOS Note 1624434.1, and it's applicable physical and virtual configurations of Exalogic. Regarding the recommended MTU value for EoIB related interfaces, its maximum appropriate value is 1500. If for some reason a vServer has been created with a higher value (set on the /etc/sysconfig/network-scripts/ifcfg-bond0 file), then it must be fixed. An error like the following could be thrown under this circumstance: [root@vServer ~]# service network restart ... Bringing up interface bond0:  SIOCSIFMTU: Invalid argument Also an error like the one below can be seen on the /var/log/messages file of the vServer: kernel: T5074835532 [mlx4_vnic] eth1:vnic_change_mtu:360: failed: new_mtu 64000 2026 The MOS Note 1611657.1 is very useful for this purpose.

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  • Revisiting the Generations

    - by Row Henson
    I was asked earlier this year to contribute an article to the IHRIM publication – Workforce Solutions Review.  My topic focused on the reality of the Gen Y population 10 years after their entry into the workforce.  Below is an excerpt from that article: It seems like yesterday that we were all talking about the entry of the Gen Y'ers into the workforce and what a radical change that would have on how we attract, retain, motivate, reward, and engage this new, younger segment of the workforce.  We all heard and read that these youngsters would be more entrepreneurial than their predecessors – the Gen X'ers – who were said to be more loyal to their profession than their employer. And, we heard that these “youngsters” would certainly be far less loyal to their employers than the Baby Boomers or even earlier Traditionalists. It was also predicted that – at least for the developed parts of the world – they would be more interested in work/life balance than financial reward; they would need constant and immediate reinforcement and recognition and we would be lucky to have them in our employment for two to three years. And, to keep them longer than that we would need to promote them often so they would be continuously learning since their long-term (10-year) goal would be to own their own business or be an independent consultant.  Well, it occurred to me recently that the first of the Gen Y'ers are now in their early 30s and it is time to look back on some of these predictions. Many really believed the Gen Y'ers would enter the workforce with an attitude – expect everything to be easy for them – have their employers meet their demands or move to the next employer, and I believe that we can now say that, generally, has not been the case. Speaking from personal experience, I have mentored a number of Gen Y'ers and initially felt that with a 40-year career in Human Resources and Human Resources Technology – I could share a lot with them. I found out very quickly that I was learning at least as much from them! Some of the amazing attributes I found from these under-30s was their fearlessness, ease of which they were able to multi-task, amazing energy and great technical savvy. They were very comfortable with collaborating with colleagues from both inside the company and peers outside their organization to problem-solve quickly. Most were eager to learn and willing to work hard.  This brings me to the generation that will follow the Gen Y'ers – the Generation Z'ers – those born after 1998. We have come full circle. If we look at the Silent Generation or Traditionalists, we find a workforce that preceded the television and even very early telephones. We Baby Boomers (as I fall right squarely in this category) remembered the invention of the television and telephone – but laptop computers and personal digital assistants (PDAs) were a thing of “StarTrek” and other science fiction movies and publications. Certainly, the Gen X'ers and Gen Y'ers grew up with the comfort of these devices just as we did with calculators. But, what of those under the age of 10 – how will the workplace look in 15 more years and what type of workforce will be required to operate in the mobile, global, virtual world. I spoke to a friend recently who had her four-year-old granddaughter for a visit. She said she found her in the den in front of the TV trying to use her hand to get the screen to move! So, you see – we have come full circle. The under-70 Traditionalist grew up in a world without TV and the Generation Z'er may never remember the TV we knew just a few years ago. As with every generation – we spend much time generalizing on their characteristics. The most important thing to remember is every generation – just like every individual – is different. The important thing for those of us in Human Resources to remember is that one size doesn’t fit all. What motivates one employee to come to work for you and stay there and be productive is very different than what the next employee is looking for and the organization that can provide this fluidity and flexibility will be the survivor for generations to come. And, finally, just when we think we have it figured out, a multitude of external factors such as the economy, world politics, industries, and technologies we haven’t even thought about will come along and change those predictions. As I reach retirement age – I do so believing that our organizations are in good hands with the generations to follow – energetic, collaborative and capable of working hard while still understanding the need for balance at work, at home and in the community! Normal 0 false false false EN-US X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}

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  • Solving the context menu problem with drag and drop in trees

    - by Frank Nimphius
    Normal 0 false false false EN-US X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} The following drag-and-drop problem has been reported on OTN: An ADF Faces tree component is configured with a af:collectionDropTarget tag to handle drop events. The same tree component also has a context menu defined that is shown when users select the tree with the right mouse button. The problem now was - and I could reproduce this - that the context menu stopped working after the first time the tree handled a drop event. The drag and drop use case is to associate employees from a table to a department in the tree using drag and drop. The drop handler code in the managed bean looked up the tree node that received the drop event to determine the department ID to assign to the employee. For this code similar to the one shown below was used List dropRowKey = (List) dropEvent.getDropSite(); //if no dropsite then drop area was not a data area if(dropRowKey == null){    return DnDAction.NONE; }                tree.setRowKey(dropRowKey); JUCtrlHierNodeBinding dropNode = (JUCtrlHierNodeBinding) tree.getRowData(); Normal 0 false false false EN-US X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} Normal 0 false false false EN-US X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} So what happens in this code? The drop event contains the dropSite reference, which is the row key of the tree node that received the drop event. The code then sets the key to the tree in a call to getRowDate() returns the node information for the drop target (the department). This however causes the tree state to go out of synch with its model (ADF tree binding), which is known to cause issues. In this use case the issue caused by this is that the context menu no longer shows up. To fix the problem, the code needs to be changes to read the current row key from the key, then perform the drop operation and at the end set the origin (or model) row key back //memorize current row key Object currentRowKey = tree.getRowKey();        List dropRowKey = (List) dropEvent.getDropSite(); //if no dropsite then drop area was not a data area if(dropRowKey == null){   return DnDAction.NONE;   }              tree.setRowKey(dropRowKey); JUCtrlHierNodeBinding dropNode = (JUCtrlHierNodeBinding) tree.getRowData(); ... do your stuff here .... //set current row key back tree.setRowKey(currentRowKey); AdfFacesContext.getCurrentInstance().addPartialTarget(tree); Node the code line that sets the row key back to its original value.

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  • Hack Fest Going Strong!

    - by Yolande Poirier
    Today was the first day of  the Hack Fest at Devoxx, the Java developer conference in Belgium.  The Hack Fest started with the Raspberry Pi & Leap Motion hands-on lab. Vinicius Senger introduced the Java Embedded, Arduino and Raspberry Pi. Java Champion Geert Bevin presented the Leap Motion, a controller sensing your hands and fingers to play games by controlling the mouse as an example. "Programmers are cooler than musicians because they can create entire universe using all senses" explained Geert In teams, participants started building applications using Raspberry Pi, sensors and relays. One team tested the performance of Tomcat, Java EE and Java Embedded Suite on the Raspberry Pi. Another used built an text animation using a LCD screen. Teams are using the Leap Motion to close and open programs on the desktop and other teams are using it as a game control. 

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  • P-Commerce – What The Heck Is That?

    - by Michael Hylton
    We’ve heard of e-commerce, m-commerce (Mobile Commerce), and f-commerce (Facebook Commerce) but what is p-commerce?  It’s not truly a customer touchpoint or channel but the emphasis on personalization of the buying experience. Ask yourself how well do you know your customer?  Are you able to take what you know about them and apply it to their commerce activity with you and personalize the shopping experience? Much of this is dictated by have a complete 360 degree view of your customer, collecting data from your website, sales interactions, historical commerce purchases, call center activity, how they got to your website, etc. and applying it to their current commerce interaction.  Customers expect to have a similar interaction on your website as they would in your brick-and-mortar store, displaying the products and services that they might be interested in purchasing.

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