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• How does a "Variables introduce state"?

  - by kunj2aan

  I was reading the "C++ Coding Standards" and this line was there: Variables introduce state, and you should have to deal with as little state as possible, with lifetimes as short as possible. Doesn't anything that mutates eventually manipulate state? What does "you should have to deal with little state as possible" mean? In an impure language such as C++, isn't state management really what you are doing? And what are other ways to "deal with as little state as possible" other than limiting variable lifetime?

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• Oracle University New Courses (Week 14)

  - by swalker

  Oracle University released the following new (versions of) courses recently: Database Oracle Data Modeling and Relational Database Design (4 days) Fusion Middleware Oracle Directory Services 11g: Administration (5 days) Oracle Unified Directory 11g: Services Deployment Essentials (2 days) Oracle GoldenGate 11g Management Pack: Overview (1 day) Business Intelligence & Datawarehousing Oracle Database 11g: Data Mining Techniques (2 days) Oracle Solaris Oracle Solaris 10 System Administration for HP-UX Administrators (5 days) E-Business Suite R12.x Oracle Time and Labor Fundamentals Get in contact with your local Oracle University team for more details and course dates. Stay Connected to Oracle University: LinkedIn OracleMix Twitter Facebook Google+

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• I'm back

  - by Rob Addis

  I haven’t posted much for a while but after 3 years as a Solution Architect I’m back to my old role designing and developing SOA Frameworks and Management Platforms. So you may be hearing a bit more from me in the future.

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• TortoiseSVN and Subversion Cookbook Part 3: In, Out, and Around

  Subversion doesn't have to be difficult, especially if you have Michael Sorens's guide at hand. After dealing in previous articles with checkouts and commits in Subversion, and covering the various file-manipulation operations that are required for Subversion, Michael now deals in this article with file macro-management, the operations such as putting things in, and taking things out, that deal with repositories and projects.

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• Red Gate SQL Prompt Verses Microsoft Intellisense

  In this economy, IT professionals have to make smart choices when it comes to spending money on developer tools. Does the new Intellisense feature of SQL Server 2008 Management Studio make third party intelligent code completion tools like Red Gate SQL Prompt obsolete?

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• Latest on Oracle Governance, Risk and Compliance

  With the widespread uncertainty afflicting economies across the globe,regulatory mandates are expected to rise as investors and citizens worldwide demand increasing transparency and accountability from corporations and public agencies alike. Tune into this conversation with Chris Leone, Group Vice-President of Oracle Applications Product Strategy, to hear the latest on Oracle’s Governance, Risk, and Compliance (GRC) Applications Suite. You will learn how companies today are ensuring a sustainable and cost-effective risk and compliance management regimen with the help of Oracle GRC applications.

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• Top Exastack ISV Headlines: Volante Technologies

  - by Javier Puerta

  Volante Achieves Oracle Exalogic Optimized, Oracle Exadata Ready, Oracle SuperCluster Ready, Oracle Solaris Ready, Oracle Linux Ready and Oracle VM Status. Volante Suite is a suite of modular tools for integration and management of financial data. Used today by major financial institutions, exchanges and industry utilities around the world, Volante enables users to rapidly build data integration solutions among market data feeds, applications and external partners. Volante finds Exalogic is strong fit for addressing scalability and operating in the most challenging financial services environments. Read more here.

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• C-states and P-states : confounding factors for benchmarking

  - by Dave

  I was recently looking into a performance issue in the java.util.concurrent (JUC) fork-join pool framework related to particularly long latencies when trying to wake (unpark) threads in the pool. Eventually I tracked the issue down to the power & scaling governor and idle-state policies on x86. Briefly, P-states refer to the set of clock rates (speeds) at which a processor can run. C-states reflect the possible idle states. The deeper the C-state (higher numerical values) the less power the processor will draw, but the longer it takes the processor to respond and exit that sleep state on the next idle to non-idle transition. In some cases the latency can be worse than 100 microseconds. C0 is normal execution state, and P0 is "full speed" with higher Pn values reflecting reduced clock rates. C-states are P-states are orthogonal, although P-states only have meaning at C0. You could also think of the states as occupying a spectrum as follows : P0, P1, P2, Pn, C1, C2, ... Cn, where all the P-states are at C0. Our fork-join framework was calling unpark() to wake a thread from the pool, and that thread was being dispatched onto a processor at deep C-state, so we were observing rather impressive latencies between the time of the unpark and the time the thread actually resumed and was able to accept work. (I originally thought we were seeing situations where the wakee was preempting the waker, but that wasn't the case. I'll save that topic for a future blog entry). It's also worth pointing out that higher P-state values draw less power and there's usually some latency in ramping up the clock (P-states) in response to offered load. The issue of C-states and P-states isn't new and has been described at length elsewhere, but it may be new to Java programmers, adding a new confounding factor to benchmarking methodologies and procedures. To get stable results I'd recommend running at C0 and P0, particularly for server-side applications. As appropriate, disabling "turbo" mode may also be prudent. But it also makes sense to run with the system defaults to understand if your application exhibits any performance sensitivity to power management policies. The operating system power management sub-system typically control the P-state and C-states based on current and recent load. The scaling governor manages P-states. Operating systems often use adaptive policies that try to avoid deep C-states for some period if recent deep idle episodes proved to be very short and futile. This helps make the system more responsive under bursty or otherwise irregular load. But it also means the system is stateful and exhibits a memory effect, which can further complicate benchmarking. Forcing C0 + P0 should avoid this issue.

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• What should I do to scale out an high-traffic website?

  - by makerofthings7

  What Best Practices should be undertaken for a Website that needs to "scale out" to handle capacity? This is especially relevant now that people are considering the cloud, but may be missing out on the fundamentals. I'm interested in hearing about anything you consider a best practice from development-level tasks, to infrastructure, to management. Use your best judgement when posting multiple answers, since it may make sense to post them separately for voting purposes. (hint: you'll likely get more reputation points for many small answers than one large answer)

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• No GRUB Screen or recovery mode on Boot after 12.04 Upgrade

  - by Nick

  I tried the live boot CD and boot-repair, also loaded the Desktop install CD, and it looks like all partitions check out OK. However, when I try to boot Linux (the only bootable partition on the computer) I get a blank screen. Every so often the screen give me something akin to: Assuming write through cache Asking for cache data failed it appears to start booting, then hangs. Ctrl+Alt+Delete shuts down the machine The last message during boot is "STarting TiMidity++ ALSA midi emulation... [OK]" I used boot-repair to generate a boot info report. One thing looks odd to me- it reports a missing core.img on /dev/sda1. Here is the full info: Boot Info Script 0.61.full + Boot-Repair extra info [Boot-Info August 2nd 2012] ============================= Boot Info Summary: =============================== = Grub2 (v1.99) is installed in the MBR of /dev/sda and looks at sector 1 of the same hard drive for core.img. core.img is at this location and looks for (,msdos1)/boot/grub on this drive. = Windows is installed in the MBR of /dev/sdb. sda1: __________________________________________ File system: ext4 Boot sector type: Grub2 (v1.99) Boot sector info: Grub2 (v1.99) is installed in the boot sector of sda1 and looks at sector 18406911 of the same hard drive for core.img, but core.img can not be found at this location. Operating System: Ubuntu 12.04.1 LTS Boot files: /boot/grub/grub.cfg /etc/fstab /boot/extlinux/extlinux.conf /boot/grub/core.img sda2: __________________________________________ File system: Extended Partition Boot sector type: - Boot sector info: sda5: __________________________________________ File system: swap Boot sector type: - Boot sector info: sdb1: __________________________________________ File system: ntfs Boot sector type: Windows XP: NTFS Boot sector info: No errors found in the Boot Parameter Block. Operating System: Boot files: ============================ Drive/Partition Info: ============================= Drive: sda _______________________________________ Disk /dev/sda: 160.0 GB, 160041885696 bytes 255 heads, 63 sectors/track, 19457 cylinders, total 312581808 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes Partition Boot Start Sector End Sector # of Sectors Id System /dev/sda1 * 63 307,339,514 307,339,452 83 Linux /dev/sda2 307,339,515 312,576,704 5,237,190 5 Extended /dev/sda5 307,339,578 312,576,704 5,237,127 82 Linux swap / Solaris Drive: sdb _______________________________________ Disk /dev/sdb: 320.1 GB, 320072933376 bytes 255 heads, 63 sectors/track, 38913 cylinders, total 625142448 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes Partition Boot Start Sector End Sector # of Sectors Id System /dev/sdb1 2,048 625,142,447 625,140,400 7 NTFS / exFAT / HPFS "blkid" output: ____________________________________ Device UUID TYPE LABEL /dev/loop0 squashfs /dev/sda1 11b4d633-7863-40b2-a6ca-da5f82c3ad0b ext4 /dev/sda5 cb8d65f4-8cf9-4088-b804-e3dea2151033 swap /dev/sdb1 349E7C109E7BC8BE ntfs Personal1 ================================ Mount points: ================================= Device Mount_Point Type Options /dev/sdb1 /media/Personal1 fuseblk (rw,nosuid,nodev,allow_other,blksize=4096,default_permissions) /dev/sr0 /live/image iso9660 (ro,noatime) ...(a bunch of config file info- let me know if anyone wants to see it!) But usually I just get "Cannot Display This Video Mode", which I know means the video output is not usable by the monitor. I'm looking for a way to get into a recovery mode.I'd really like to avoid wiping the drive. Any thoughts?

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• I erased osx when i installed ubuntu, how do i set up dual boot

  - by mandy

  I have a macbook pro 8,1 running ubuntu 11.10 on it. Before I wiped osx clean off it, i was running osx lion. This computer was shipped with snow leopard on it so i know it will work on it, but when i try to run the install disk (Even before ubuntu while on lion) i got all kinds of kernel panic and it told me to restart my computer. i just want a dual boot set up so how do i make a partition in ubuntu and put mac on it?

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• Learning GNU Text Utilities

  <b>Linux.com:</b> "A few weeks ago we looked at some of the GNU utilities that you can use to work with files, check MD5/SHA1 sums and check your disk usage. This time around I want to cover some of the utilities that you'll use for working with text files."

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• Ubuntu 12.10 install stuck at first step

  - by Josh Clarke

  I'm trying to install Ubuntu 12.10 from a DVD-R disk, and everything is just fine until I get to the first window after clicking "Install Ubuntu" I checked the box "Download updates while installing" and also the "Install third-party software" box. After clicking next, however, the install just hangs there. I've been waiting for over an hour now and all I see is the mouse cursor showing that it's "loading". What should I do to get past this? Thanks!

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• CMS is Perfect Solution for Small Business Owners

  A website can be built easily with content management system because it has the ability to add Pages in simple format like text format and they are automatically translated into perfect to near perfe... [Author: Alan Smith - Web Design and Development - March 21, 2010]

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• Safety of installing Ubuntu alongside Windows

  - by giowck

  Is it really safe to chose the "Install Ubuntu alongside Windows" option from the Ubuntu installation program? I never used that option, instead I used other tools such as partition magic or windows 7's disk tool to resize my partitions. Since I'm going to install Ubuntu across a lot windows (XP, Vista and 7) machines. It would not be nice to damage those Windows partitions. What is your experience? Can I use this feature without concerns?

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• 7 Preventable Backup Errors

  The loss of a company's data is often enough to put the company out of business; and yet backup errors are generally avoidable with the application of common sense rather than deep technical knowledge. Grant digs into memories of his long experience of giving forum advice, to come up with the most easily preventable backup errors. Get Smart with SQL Backup Pro Powerful centralised management, encryption and more.SQL Backup Pro was the smartest kid at school Discover why.

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• Getting Started With Tailoring Business Processes

  - by Richard Bingham

  In this article, and for the sake of simplicity, we will use the term “On-Premise” to mean a deployment where you have design-time development access to the instance, including administration of the technology components, the applications filesystem, and the database. In reality this might be a local development instance that is then supported by a team who can deploy your customizations to the restricted production instance equivalents. Tools Overview Firstly let’s look at the Design-Time tools within JDeveloper for customizing and extending the artifacts of a Business Process. In essence this falls into two buckets; SOA Composite Editor for working with BPEL processes, and the BPM Studio. The SOA Composite Editor As a standard extension to JDeveloper, this graphical design tool should be familiar to anyone previously worked with Oracle SOA Server. With easy-to-use modeling capability, backed-up by full XML source-view (for read-only), it provides everything that is needed to implement the technical design. In simple terms, once deployed to the remote SOA Server the composite components (like Mediator) leverage the Event Delivery Network (EDN) for interaction with the application logic. If you are customizing an existing Fusion Applications BPEL process then be aware that it does support MDS-based customization layers just like Page Composer where different customizations are used based on the run-time context, like for a specific Product or Business Unit. This also makes them safe from patching and upgrades, although only a single active version of the composite is available at run-time. This is defined by a field on the composite record, available in Enterprise Manager. Obviously if you wish to fire different activities and tasks based on the user context then you can should include switches to fork the flows in your custom BPEL process. Figure 1 – A BPEL process in Composite Editor The following describes the simplified steps for making customizations to BPEL processes. This is the most common method of changing the business processes of Fusion Applications, as over 400 BPEL-based composite applications are provided out-of-the-box. Setup your local Fusion Applications JDeveloper environment. The SOA Composite Editor should be installed as part of the Fusion Applications extension. If there are problems you can also find it under the ‘Check for Updates’ help menu option. Since SOA Server is not part of the JDeveloper integrated WebLogic Server, setup a standalone WebLogic environment for deploying and testing. Obviously you might use a Fusion Applications development instance also. Package the existing standard Fusion Applications SOA Composite using Enterprise Manager and export it as a complete SOA Archive (SAR) file, resulting in a local .jar file. You may need to ask your system administrator for this. Import the exported SAR .jar file into JDeveloper using the File menu, under the option ‘SOA Archive into SOA Project’. In JDeveloper set the appropriate customization layer values, and then change from the default role to the Fusion Applications Customization Developer role. Make the customizations and save the application project. Finally redeploy the composite application, either to a direct Application Server connection, or as a fresh SAR (jar) file that can then be re-imported and deployed via Enterprise Manager. The Business Process Management (BPM) Suite In addition to the relatively low-level development environment associated with BPEL process creation, Oracle provides a suite of products that allow business process adjustments to be made without the need for some of the programming skills.  The aim is to abstract much of the technical implementation and to provide a Business Analyst tools for immediately implementing organization changes. Obviously there are some limitations on what they can do, however the BPM Suite functionality increases with each release and for the majority of the cases the tools remains as applicable as its developer-orientated sister. At the current time business processes must be explicitly coded to support just one of these use-cases, either BPEL for developer use or BPM for business analyst use. That said, they both run on the same SOA Server in much the same way. The components bundled in each SOA Composite Application can be verified by inspection through Enterprise Manager. Figure 2 – A BPM Process in JDeveloper BPM Suite. BPM processes are written in a standard notation (BPMN) and the modeling tools are very similar to that of BPEL. The steps to deploy a custom BPM process are also essentially much the same, since the BPM process is bundled into a SOA Composite just like a BPEL process. As such the SOA Composite Editor  actually has support for both artifacts and even allows use of them together, such as a calling a BPM process as a partnerlink from a BPEL process. For more details see the references below. Business Analyst Tooling In addition to using JDeveloper extensions for BPM development, there are run-time tools that Business Analysts can use to make adjustments, so that without high costs of an IT project the system can be tuned to match changes to the business operation. The first tool to consider is the BPM Composer, deployed with the middleware SOA Server and accessible online, and for Fusion Applications it is under the Business Process icon on the homepage of the Application Composer. Figure 3 – Business Process Composer showing a CRM process flow. The key difference between this and using JDeveloper is that the BPM Composer has a Business Catalog prepopulated with features and functions that can be used, mostly through registered WebServices. This means no coding or complex interface development is required, simply drag-drop-configure. The items in the business catalog are seeded by either Oracle (as a BPM Template) or added to by your own custom development. You cannot create or generate catalog content from BPM Composer directly. As per the screenshot you can see the Business Catalog content in the BPM Project browser region. In addition, other online tools for use by Business Analysts include the BPM Worklist application for editing business rules and approval management configuration, plus the SOA Composer which focuses on non-approval business rules and domain value maps. At the current time there are only a handful of BPM processes shipped with Fusion Applications HCM and CRM, including on-boarding workers and processing customer registrations.  This also means a limited number of associated BPM Templates provided out-of-the-box, therefore a limited Business Catalog. That said, BPM-based extension is a powerful capability to leverage and will most likely develop going forwards, especially for use in SaaS deployments where full design-time JDeveloper access is not available. Further Reading For BPEL – Fusion Applications Extensibility Guide – Section 12 For BPM – Fusion Applications Extensibility Guide – Section 7 The product-specific documentation and implementation guides for Fusion Applications Fusion Middleware Developers Guide for SOA Suite Modeling and Implementation Guide for Oracle Business Process Management User’s Guide for Oracle Business Process Composer Oracle University courses on BPM Suite and SOA Development

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• IBM DB2 Error Checking

  Database management systems (DBMSs) have simultaneously simplified and complicated the lives of many IT workers. Error codes passed from the database back to the application can take on more than 1000 values. What level of error checking should developers include in applications?

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• Open sourcing Thoughtsite - A discussion forum designed for Google App Engine

  Google App Engine is a powerful system, designed to take all the pain of infrastructure management and performance scaling out of web application programming. App Engine applications are...

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• Open sourcing Thoughtsite - A discussion forum designed for Google App Engine

  Editor's Note: Cross-posted from the Open Source at Google Blog . Google App Engine is a powerful system, designed to take all the pain of infrastructure management and...

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• Webcast: Redefining the CRM and E-Commerce Experience with Oracle Exalogic

  - by Sanjeev Sharma

  Have your CRM applications been growing in cost and complexity? Do your customers want to reach you through more channels than ever? Does your business need to handle peak sales and customer service demand, but your IT budget only covers current needs? Learn how Oracle Exalogic combines Oracle hardware and software to achieve breakthrough performance and scalability, and how real Oracle customers are simplifying the deployment and management of their CRM applications. Register for the webcast here.

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• Make your TSQL easier to read during a presentation

  - by fatherjack

  SQL Server Management Studio 2012 has some neat settings that you can use to help your presentations at a SQL event better for the attendees if you are willing to spend a few minutes making some settings changes. Historically, I have been reluctant to make changes to my SSMS settings as it is such a tedious process and it's not 100% clear that what you think you are changing is actually what gets changed. With SSMS 2012 this has become a lot easier and a...(read more)

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• Matinale Hyperion - 26 juin 2013 : Agenda disponible

  - by Louisa Aggoune

  INNOVATION - LEADERSHIP - EVOLUTION Votre rendez-vous annuel privilégié avec la communauté Hyperion (clients, partenaires et experts solutions) en partenariat avec les Clubs Utilisateurs Oracle. Réservez dès à présent votre matinée du 26 juin prochain pour échanger sur des cas réels d’utilisation de la solution Oracle Hyperion Enterprise Performance Management lors de cette édition résolument placée sous le signe de l'interactivité. Découvrez l'agenda : cliquez içi Avec la participation de Klee, l'AUFO, Neo Finance, Micropole, Armonia, Shortways Inscrivez-vous vite, nombre de places limité. 26 Juin 2013 8h30 à 11h30 Châteauform' Monceau Rio 4 place Rio de Janeiro 75008 Paris

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• CyberSource, ThreatMetrix Partner to Secure IDs

  The electronic payment and risk management services provider has teamed up with security software vendor ThreatMetrix to provide advanced identity protection applications to combat online transaction fraud.

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• From the Tips Box: Life after Babel Fish, Hidden Features in iOS apps, and Finding Clean Beaches with a Smartphone

  - by Jason Fitzpatrick

  Once a week we round up some of the great reader tips that come pouring in and share them with everyone. This week we’re looking at Bing’s absorbtion of Babelfish, hidden features in iOS apps, and how to find a clean beach with your smartphone. HTG Explains: What Is RSS and How Can I Benefit From Using It? HTG Explains: Why You Only Have to Wipe a Disk Once to Erase It HTG Explains: Learn How Websites Are Tracking You Online

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