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• Podcast interview with Michael Kane

  - by mhornick

  In this podcast interview with Michael Kane, Data Scientist and Associate Researcher at Yale University, Michael discusses the R statistical programming language, computational challenges associated with big data, and two projects involving data analysis he conducted on the stock market "flash crash" of May 6, 2010, and the tracking of transportation routes bird flu H5N1. Michael also worked with Oracle on Oracle R Enterprise, a component of the Advanced Analytics option to Oracle Database Enterprise Edition. In the closing segment of the interview, Michael comments on the relationship between the data analyst and the database administrator and how Oracle R Enterprise provides secure data management, transparent access to data, and improved performance to facilitate this relationship. Listen now...

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• Application for taking pretty screenshots (like OS X does)

  - by Oli

  I've been building a website for a guy who uses Mac OS X and occasionally he sends me screenshots of bugs. They come out looking like this: This is fairly typical of Mac screenshots. You get the window decorations, the shadow from the window and a white or transparent background (not the desktop wallpaper -- I've checked). Compare this to an Ubuntu window-shot (Alt+Print screen): It's impossible to keep a straight face and say the Ubuntu one anywhere near as elegant. My question is: Is there an application that can do this in Ubuntu? Edit: Follow up: Is there an application that can do this in one move? Shutter is pretty good but running the plugin for every screenshot is pretty tiresome as it doesn't seem to remember my preference (I want south-shadow and that requires selecting south, then clicking refresh, then save) and it's more clicks than I'd like. Is there a simple way of telling shutter I want south-shadow for all screenshots (except entire desktop and area-selection)?

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• "Oracle", "Sybase", "SQL Server" vs just "SQL/JDBC" in the CV

  - by bobah

  How would you define a testable measure of the expertise that, if you're honest with yourself, lets you write in your CV words "Oracle", "Sybase", or "SQL Server" and not just "Relational Databases, SQL, JDBC" in your software developer's CV? What every XXX-developer (XXX - a vendor name) should know? The question is similar to http://stackoverflow.com/questions/2119859/questions-every-good-database-sql-developer-should-be-able-to-answer but is vendor-specific. Below is a start of the list as an example, demonstrate what kind of answers I am hoping to get. If you are expert in X then you know that Y (X - Y below): Sybase/SQL Server - they are very similar, Sybase is much more expensive Sybase/SQL Server - for Java you can use either native Sybase/JSQLDB driver or jTDS that is using TDS protocol and can connect to SQL Server as well, TDS traffic can be dumped and analyzed with hexdump command Sybase/SQL Server - for C++ you can use FreeTDS to connect to any, for Perl - same Sybase/SQL Server - a query can return multiple result sets and return codes, all need to be processes otherwise errors can happen Sybase/SQL Server - sp_help, sp_helptext Sybase/SQL Server - your tables/views/procedures are under DBName/dbo/... Sybase - for C++ on Linux you can use Sybase client API to connect (at least until recently) SQL Server - JDBC driver has a configurable transparent failover capability Oracle - for C++ Linux one can use OTLv4 that is a very powerful yet lightweight wrapper around Oracle client API Oracle compilation (contributors: ammoQ) PLSQL Java Stored Procedures '' is null Hierarchical Query Analytic Functions Oracle Text

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• Is RAC One Node Certified for E-Business Suite?

  - by Steven Chan

  Oracle Real Application Clusters (RAC) is a cluster database with a shared cache architecture that supports the transparent deployment of a single database across a pool of servers.  RAC is certified with both Oracle E-Business Suite Release 11i and 12.  We publish best-practices documentation for specific combinations of EBS + RAC versions.  For example, if you were planning on implementing RAC for EBS 12, you would use this documentation:Using Oracle 11g Release 2 Real Application Clusters with Oracle E-Business Suite Release 12 (Note 823587.1)Many of the largest E-Business Suite users in the world run RAC today, including Oracle; see this Oracle R12 case study for details.A number of customers have recently asked whether RAC One Node can be used with the E-Business Suite.  From the RAC website:Oracle RAC One Node is a new option available with Oracle Database 11g Release 2. Oracle RAC One Node is a single instance of an Oracle RAC-enabled database running on one node in a cluster.

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• OBIEE 11.1.1.5 or above: Admin Server as a single point of failure (SPOF) is REALLY not impacting OBIEE work

  - by Ahmed Awan

  Applies To: 11.1.1.5, 11.1.1.6 Admin Server as a single point of failure (SPOF) is REALLY not impacting OBIEE work. By setting virtualize tag to true (in EM) to manage multiple LDAP providers, it is enabling failover and HA on authentication and authorization inside OBIEE.   Following are the test cases used for testing impact on OBIEE, if Admin Server is not available:   a. Test 1: Admin Server crashes and impact on OBIEE Scenario: All OBIEE components are up and running.   b. Test 2: Admin Server had not been started and impact on OBIEE. Scenario: OBIEE Server bi_server1 is started, but Admin Server isn’t   For more details on each of the above test, click here to download the Test Results   Links to Official documentations below: http://docs.oracle.com/cd/E23943_01/bi.1111/e10543/privileges.htm#BIESC6077 http://docs.oracle.com/cd/E23943_01/bi.1111/e10543/privileges.htm#BABHFFEI http://docs.oracle.com/cd/E23943_01/bi.1111/e10543/authentication.htm#BIESC6075

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• Load-balancer options

  - by toolkit

  I am looking at a number of possible options for load-balancing. So far, I am constrained to the following options: DNS server load-balancer, balancing to a cluster of tomcat servers, with terracotta for session replication. Pros - don't have to buy new kit. Cons - DNS lb can keep directing to a broken server. Hardware load-balancer, direct to cluster of tomcat servers. Pros - could have second box for failover lb. Cons - expense. Apache server load-balancer. Pros - apache's lb polls for broken servers. Cons - apache server is single point of failure, plus need to buy another server. Are there any other options I should consider? Thanks. Update: Thanks for all the answers so far +1's all round. Not accepting an answer yet, to keep more ideas coming.

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• Virtualization in Solaris 11 Express

  - by lynn.rohrer(at)oracle.com

  In Oracle Solaris 10 we introduced Oracle Solaris Containers -- lightweight virtual application environments that allow you to consolidate your Oracle Solaris applications onto a single Oracle Solaris server and make the most of your system resources.The majority of our customers are now using Oracle Solaris Containers on their enterprise systems for applications ranging from web servers to Oracle Database installations. We can also make these Containers highly available with Oracle Solaris Cluster, the industry's first virtualization-aware enterprise cluster product. Using Oracle Solaris Cluster you can failover applications in a Container to another Container on a single system or across systems for additional availability.We've added significant features in Oracle Solaris 11 Express to improve and extend the Oracle Solaris Zone model:Integration of Zones with our new Solaris 11 packaging system (aka Image Packaging System) to provide easy software updates within a zoneSupport for Oracle Solaris 10 Zones to run your Solaris 10 applications unaltered on an Oracle Solaris 11 Express systemIntegration with the new Oracle Solaris 11 network stack architecture (more on this in a future blog post)Improved observability with the zonestat management interface and commandsDelegated administration rights for owners of individual non-global zonesTight integration with Oracle Solaris ZFS to allow dedicated datasets per zoneWith ZFS as the default file system we can now provide easy to manage Boot Environments for zonesThis quick summary is just to whet your appetite to learn more about Oracle Solaris 11 Express Zones enhancements. Fortunately we can serve a full meal at the Oracle Solaris 11 Express Technology Spotlight on Virtualization page on the Oracle Technical Network.

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• How to control admission policy in vmware HA?

  - by John

  Simple question, I have 3 hosts running 4.1 Essentials Plus with vmware HA. I tried to create several virtual machines that filled 90% of each server's memory capacity. I know that vmware has really sophisticated memory management within virtual machines, but I do not understand how the vCenter can allow me even to power on the virtual machines that exceed the critical memory level, when the host failover can be still handled. Is it due to the fact that virtual machines does not use the memory, so that it is still considered as free, so virtual machines can be powered on ? But what would happen if all VMs would be really using the RAM before the host failure - they could not be migrated to other hosts after the failure. The default behaviour in XenServer is that, it automatically calculates the maximum memory level that can be used within the cluster so that the host failure is still protected. Vmware does the same thing ? The admission policy is enabled. Vmware HA enabled.

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• Flixel Game Over Screen

  - by Jamie Read

  I am new to game development but familiar with programming languages. I have started using Flixel and have a working Breakout game with score and lives. I am just stuck on how I can create a new screen/game over screen if a player runs out of lives. I would like the process to be like following: Check IF lives are equal to 0 Pause the game and display a new screen (probably transparent) that says 'Game Over' When a user clicks or hits ENTER restart the level Here is the function I currently have to update the lives: private function loseLive(_ball:FlxObject, _bottomWall:FlxObject):void { // check for game over if (lives_count == 0) { } else { FlxG:lives_count -= 1; lives.text = 'Lives: ' + lives_count.toString() } } Here is my main game.as: package { import org.flixel.*; public class Game extends FlxGame { private const resolution:FlxPoint = new FlxPoint(640, 480); private const zoom:uint = 2; private const fps:uint = 60; public function Game() { super(resolution.x / zoom, resolution.y / zoom, PlayState, zoom); FlxG.flashFramerate = fps; } } }

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• Red Hat cluster: Failure of one of two services sharing the same virtual IP tears down IP

  - by js01

  I'm creating a 2+1 failover cluster under Red Hat 5.5 with 4 services of which 2 have to run on the same node, sharing the same virtual IP address. One of the services on each node needs a (SAN) disk, the other doesn't. I'm using HA-LVM. When I shut down (via ifdown) the two interfaces connected to the SAN to simulate SAN failure, the service needing the disk is disabled, the other keeps running, as expected. Surprisingly (and unfortunately), the virtual IP address shared by the two services on the same machine is also removed, rendering the still-running service useless. How can I configure the cluster to keep the IP address up?

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• SQL Server in the Evening - 19th Jan in Frimley, Surrey

  - by JustinL

  Just a short note to mention, Gavin Payne (blog and twitter) is organising an event shortly in Frimley, Surrey - SQL Server in the Evening.  The Agenda focuses on Infrastructure DBAs, with the following sessions planned:Getting the most for SQL Server from VMware – VMware Sales EngineerSQL Server Transparent Data Encryption – Gavin Payne, Solution Architect, AttendaUnderstanding where cloud services really fit within your data centre – Matt Mould, Advisory Practice Consultant, EMC ConsultingIf it sounds like it might float your boat and/ or you fancy meeting some fellow SQL Server DBAs, it's free to register here: http://www.eventbrite.com/event/1125559579Regards,Justin Langford - Coeo LtdSQL Server Consultants | SQL Server Remote DBA

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• Why and when should I make a class 'static'? What is the purpose of 'static' keyword on classes?

  - by Saeed Neamati

  The static keyword on a member in many languages mean that you shouldn't create an instance of that class to be able to have access to that member. However, I don't see any justification to make an entire class static. Why and when should I make a class static? What benefits do I get from making a class static? I mean, after declaring a static class, one should still declare all members which he/she wants to have access to without instantiation, as static too. This means that for example, Math class could be declared normal (not static), without affecting how developers code. In other words, making a class static or normal is kind of transparent to developers.

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• CSS Style Element if it does not contain another specific type of Element [migrated]

  - by Chris S

  My CSS includes the following: #mainbody a[href ^='http'] { background:transparent url('/images/icons/external.svg') no-repeat top right; padding-right: 12px; } This places an "external" icon next to links that start with "http" (all internal site links are relative). Works perfectly except if I link an Image, it also get this icon. For example: <a href='http://example.com'><img src='whatever.jpg'/></a> would also get the "external" icon next to the image. I can live with this if necessary, but would like to eliminate it. This must be implement in CSS (no JS); must not require any special IDs, Classes, styling in the html for the image or anchor around the image. Is this possible?

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• Load balancing with rsync

  - by David

  i have 2 server with public ip: SERVER A - 10.10.10.11 SERVER B - 10.10.10.12 both of them are centos 6 in OS, installed nginx with php-fpm, 2 exact same website stored at: /var/www/html. Domain with: myxdomain.com and dns hosted with cloudflare ( since cloudflare do support round robin ) to point the domain to A record of 10.10.10.11 and 10.10.10.12. I know that round robin dns does not cover the failover or fallover, but it does not matter, what i need is: How do i sync the both content of /var/www/html server A and server B to be exactly same? Lets say: 1) user uploaded their file to server A, the file content will be sync to server B as well. 2) user uploaded their file to server B, the file content will be sync to server A as well. rsync will be good choice here? Any example of command line and cronjob time that suitable? thanks

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• All of ESX4 hosts not responding after rebooting vCenter server

  - by hojyokinmo

  Hello I'm constructing 5ESX+a vCenter serv. I'm testing FT on the system. Today vCenter OS (W2008) demanded system reboot. After rebooting vCenter Serv. All of ESX hosts have alert icon. end indicate "not responding" I tried to connect ESX (version 4) hosts to vCenter again. Once they came back normally, but after few seconds ,They turned red again. All of them have ping connection to vCenter serv. There are no red messages in Tusks and events. Two messages are found in Summary of Cluster ·There aren't sufficient resource for HA failover. ·Can't contact primary HA agent. I'm also not able to reset FT configuration because all of VMS aren't accessed from vCenter What should I do?

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• Oracle VM Slides and Replay

  - by Alex Blyth

  Thanks everyone for attending the webcast on "Oracle VM and Virtualisation" last week. I know I got some useful info out of the session and on behalf of all those who attended I'll say Thank You to Dean Samuels for spending some time talking to us.Slides are available here Oracle VM - 28/04/2010 View more presentations from Oracle Australia. You can download the replay here. Next week's session is on Oracle Database Security and will cover briefly all the big guns like Transparent Data Encryption, Database Vault, Audit Vault, Flashback Data Archive as well as touching on some of the features that are so often skipped over. You can enroll for this session here. Thanks again Cheers Alex

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• Patrick Curran Session-Keynote at DOAG 2012

  - by Heather VanCura

  Patrick Curran, Chair of the  Java Community Process (JCP) and Director of the JCP Program Management Office, will be speaking this week at the DOAG 2012 event in Nuremberg Germany. Keynote Java: Restructuring the Java Community ProcessNovember, 22nd | 09:00-09:45 am The Java Community Process (JCP) plays a critical role in the evolution of Java.  This keynote will explain how the JCP is organized and how interested members of the Java community - commercial organizations, non-profits, Java user-groups, and individual developers - work together to advance the Java language and platforms. It will then discuss recent and upcoming changes to the JCP's structure and operating processes, and will explain how these changes ('JCP.next') will make the organization more efficient and will ensure that its work is carried out in a more open and more transparent manner.

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• Virutal Machine loses network connectivity on Hyper V

  - by Chris W

  We're running a number of VMs on a 6 node failover cluster of blades using Hyper V. We have an intermittent issue (every few days at different times - not a fixed frequency) of VMs losing network connectivity. Console access to the VM suggests all is fine and the underlying blade has normal connectivity. To resolve the problem we either have to re-start the VM or, more usually, we do a live migration to another blade which fires up connectivity and we then migrate it back to the original blade. I've had 3 instances of this happen with a specific VM running on a particular blade however it has happened once with a different VM running on a different blade. All VMs and blades have the same basic setup and are running Windows 2008 R2. Any ideas where I should be looking to diagnose the possible causes of this problem as the event logs provide no help?

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• notifyOSD in gnome is not like in Unity

  - by Rodrigo

  tengo dos sistema operativos ubuntu 12.04, con escritorio gnome. En uno, las notificaciones emergentes son como en unity, pero en el otro SO son diferentes, grises, sin transparencia, y también hay que cerrarlas, por lo que quiero que quede la que viene por defecto en Unity en éste gnome también. Si alguie sabe algo sobre estas notificaciones emergentes feas, que por favor, me ayude. Gracias!! Google Traslate: I have two operating system Ubuntu 12.04 with gnome desktop. In one, the pop-up notifications are as in unity, but in the other OS are different, gray, not transparent, and you also have to close them, so I want to make the default one in gnome Unity in this too. If alguie know something about these ugly pop-up notifications, please, help me. Thanks!

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• Use a proxy which connects to the school proxy

  - by denNorske

  How to get my computer use a proxy ON my computer, which connects to the school proxy ? The reason I ask this, is because I need all programs on my computer, absolutely the whole system to go through the network, without having to use proxy authentication? Then I was thinking of a possibility to use a local proxy without authentication, to connect to the school proxy (with all authentication details), and then be able to make the system go through it? Is that possible? I've heard some stories about using IP-tables to make a transparent proxy, but I have no idea how to do that, as i am pretty new at all this. So, details, explanations and suggestions about this are very welcome! If you need more details, I'll provide them!

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• OData where art thou?

  - by Brian

  Douglas Purdy explains. I think the best part will be the governmental aspect. All public record should be available in a way that’s easy to query IMHO. From the article: Many of us at Microsoft believe the OData protocol can help usher in a more open and programmable Web by creating a common funnel to expose rich data, thereby creating a world of customized consumer mash-ups; a world where government data is transparent and accessible to any citizen; a world where you can ask a question and know, “There’s a feed for that.” Do check out www.odata.org, and while you’re at it, check out codename Dallas. For all those government IT workers out there, consider the savings. No need to pay someone to format the data for a specific department or constituent. Just put it online and point them there.

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• can't connect to Sql Sever Management Express 2012

  - by Rare-Man

  i installed Sql Sever Management Express 2012 , but when i try to connect in Sql management studio enviroment , i have this error . TITLE: Connect to Server Cannot connect to .. ADDITIONAL INFORMATION: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: 2) For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft%20SQL%20Server&EvtSrc=MSSQLServer&EvtID=2&LinkId=20476 The system cannot find the file specified BUTTONS: OK ................................................................................... and in during installion i dont have option for select cluster !! this is my SQL Server Configuration Manager , my sql server service is empty ... And when get Remove a Failover Cluster Node , this error happened . http://oi57.tinypic.com/2lrvat.jpg

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• XNA - Drawing 2D Primitives (Boxes) and Understanding Matrices in Computer Graphics

  - by MintyAnt

  I have two issues which I wish to solve by creating 2D primitives in XNA. In my game, I wish to have a "debug mode" which will draw a red box around all hitboxes in the game (Red outline, transparent inside). This would allow us to see where the hitboxes are being drawn AND still have the sprite graphics being drawn. I wish to further understand how matrices work within computer graphics. I have a basic theoretical grasp of how they work, but I really just want to apply some of my knowledge or find a good tutorial on it. To do this, I wish to draw my own 2D primitives (With Vertex3's) and apply different transormation matrices to them. I was trying to find a tutorial on drawing primitives using Direct3D, but most tutorials are only for c++, and just tell me to use XNA's Spritebatch. I wish to have more control over my program than just with Spritebatch. Any Help on using Direct3D or any other suggestions would greatly be appreciated. Thank you.

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• Two internet connections coming in, one Sonicwall Tz170 (enhanced os), and slow speed

  - by Development 4.0

  I work a lot from my home office and being in general a tad paranoid I have cable and DSL pipes coming into my house. I have used an Ebay bought Sonicwall Tz170 with the enhanced OS for a good while. I believe it does failover and has a feature for doing round robin on which connection is used. I get the impression from using it that I might not be getting the most out of this setup. Is it possible/likely that my router could be a cause of the slowdown? Are there more appropriate choices?

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• looking for a clock widget that is unaffected by the mouse

  - by Joshua Robison

  Between screenlets, cairo-dock widgets and plasma-widgets. One of them's gotta have this function; A widget that hovers above everything on the desktop but is completely unaffected by the mouse. I would use this by making a clock hover above everything and semi transparent. I also want to be able to click on windows underneath the clock. After some experimentation, the screenlets widgets do not do what I am asking. I can make them float above everything on the screen but I am not able to click on windows underneath them. I need the widget to be COMPLETELY unaffected by the mouse.

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