Search Results

Search found 13324 results on 533 pages for 'stop words'.

Page 389/533 | < Previous Page | 385 386 387 388 389 390 391 392 393 394 395 396  | Next Page >

• Don't Miss At Devoxx!!!

  - by Yolande Poirier

  Come by IoT Hack Fest which starts with the session: kickstart your Raspberry Pi and/or Leap Motion project, part II on Tuesday from 9:30am to 12:00pm to learn how to start a project with the Raspberry Pi and Leap Motion. In the afternoon, you can still join a project and create your own project with the help of experts on Raspberry Pi, Leap Motion and other boards.  At the Oracle booth, Java experts will be available  to answer your  questions and demo the new features of the Java Platform, including Java Embedded, JavaFX, Java SE and Java EE. This year, the chess game that was first demoed at JavaOne keynotes last September will be showcased at Devoxx.  Duke is coming to Devoxx this year. You can get your picture taken with Duke on Tuesday, Wednesday and Thursday (Nov. 12-14) from 12:00 to 18:00 Beer bash will be Tuesday from 17:30-19:30 and Wednesday/Thursday from 18:00 to 20:00 at the booth. Oracle is raffling off five Raspberry Pi's and a number of books every day. Make sure to stop by and get your badge scanned to enter the raffle. Raffles are Tuesday at 19:15 and Wednesday/Thursday at 19:45 at the Oracle booth.  The main conference sessions from Oracle Java experts are:  Wednesday 13 November Beyond Beauty: JavaFX, Parallax, Touch, Raspberry Pi, Gyroscopes, and Much More Angela Caicedo, Senior Member, Technical Staff, Oracle Room 7, 12:00–13:00 Lambda: A Peek Under the Hood, Brian Goetz, Software Architect, Oracle Room 8, 12:00–13:00 In Full Flow: Java 8 Lambdas in the Stream, Paul Sandoz, Software Developer, Oracle Room 8, 14:00–15:00 The Modular Java Platform and Project Jigsaw, Mark Reinhold, Chief Architect, Java Platform Group, Oracle, Room 8, 15:10–16:10 The Curious Case of JavaScript on the JVM, Attila Szegedi, Principal Member, Technical Staff, Oracle, Room 5, 16:40–17:40 Is It a Car? Is It a Computer? No, It’s a Raspberry Pi JavaFX Informatics System. Simon Ritter, Principal Technology Evangelist, Oracle Room 7, 16:40–17:40 Thursday 14 November Java EE 7: What’s New in the Java EE Platform Linda DeMichiel, Consulting Member, Technical Staff, Oracle, Room 8, 10:50–11:50 Java Microbenchmark Harness: The Lesser of the Two Evils, Aleksey Shipilev, Principal Member, Technical Staff, Oracle. Room 6, 14:00–15:00 Practical Restful Persistence, Shaun Smith, Senior Principal Product Manager, Oracle Room 8, 17:50–18:50 Friday 15 November Avatar.js, Server-Side JavaScript on the Java Platform, Jean-Francois Denise, Software Developer, Oracle Room 8, 11:50–12:50

  Read the article

• DOAG 2012 and Educause 2012

  - by Chris Kawalek

  Oracle understands the value of desktop virtualization and how customers have really embraced it as a top tier method to deliver access to applications and data. Just as supporting operating systems other than Windows in the enterprise desktop space started to become necessary perhaps 5-7 years ago, supporting desktop virtualization with VDI, application virtualization, thin clients, and tablet access is becoming necessary today in 2012. Any application strategy needs to have a secure mobile component, and a solution that gives you a holistic strategy across both mobile and fixed-asset (i.e., desktop PCs) devices is crucial to success. This means it's probably useful to learn about desktop virtualization, even if it's not in your typical area of responsibility. A good way to do that is at one of the many trade shows where we exhibit. Here are two examples:  DOAG 2012 Conference + Exhibition The DOAG Conference is fast approaching, starting November 20th in Nuremberg, Germany. If you've been reading this blog for a while, you might remember that we attended last year as well. This conference is fantastic for us because we get to speak directly to users of Oracle products. In many cases, those DBAs, IT managers, and other infrastructure folks are looking for ways to deal with the burgeoning BYOD model, as well as ways of streamlining their standard desktop and access technologies. We have a couple of sessions where you can learn a great deal about how Oracle can help with these points. Session Schedule (look under "Infrastruktur & Hardware") The two sessions focused on desktop virtualization are: Oracle VDI Best Practice unter Linux (Oracle VDI Best Practice Under Linux) Virtual Desktop Infrastructure Implementierungen und Praxiserfahrungen (Virtual Desktop Infrastructures Implementations and Best Practices) We will also have experts on hand at the booth to answer your questions on using desktop virtualization. If you're at the show, please stop by and say hello to our team there! Educause 2012  Another good example is Educause. We've gone the last few years to show off a slough of education oriented applications and capabilities in the Oracle product portfolio. And every year, we display those applications through Oracle desktop virtualization. This means the demonstration can easily be setup ahead of time and replicated out to however many "demo pods" that we have available. There's no need for our product teams to setup individual laptops for demos -- we can display a standardized Windows desktop virtual machine with their apps all ready to go on a whole bunch of devices like your standard trade show laptop, our Sun Ray Clients, and iPad. Educause 2012 just wrapped, so we're sorry we missed you this year. But there is always next year! Until then, here are a few pictures from this year's show: You can also watch this video to see how Catholic Education Australia uses Oracle Secure Global Desktop to help cope with the ever changing ways that people access their applications.  -Chris 

  Read the article

• SQL SERVER – Asynchronous Update and Timestamp – Check if Row Values are Changed Since Last Retrieve

  - by pinaldave

  Here is the question received just this morning. “Pinal, Our application is much different than other application you might have come across. In simple words, I would like to call it Asynchronous Updated Application. We need your quick opinion about one of the situation which we are facing. From business side: We have bidding system (similar to eBay but not exactly) and where multiple parties bid on one item, during the last few minutes of bidding many parties try to bid at the same time with the same price. When they hit submit, we would like to check if the original data which they retrieved is changed or not. If the original data which they have retrieved is the same, we will accept their new proposed price. If original data are changed, they will have to resubmit the data with new price. From technical side: We have a row which we retrieve in our application. Multiple users are retrieving the same row. Some of the users will update the value of the row and submit. However, only the very first user should be allowed to update the row and remaining all the users will have to re-fetch the row and updated it once again. We do not want to lock any record as that will create other problems. Do you have any solution for this kind of situation?” Fantastic Question. I believe there is good chance that we can use timestamp datatype in this kind of application. Before we continue let us see following simple example. USE tempdb GO CREATE TABLE SampleTable (ID INT, Col1 VARCHAR(100), TimeStampCol TIMESTAMP) GO INSERT INTO SampleTable (ID, Col1) VALUES (1, 'FirstVal') GO SELECT ID, Col1, TimeStampCol FROM SampleTable st GO UPDATE SampleTable SET Col1 = 'NextValue' GO SELECT ID, Col1, TimeStampCol FROM SampleTable st GO DROP TABLE SampleTable GO Now let us see the resultset. Here is the simple explanation of the scenario. We created a table with simple column with TIMESTAMP datatype. When we inserted a very first value the timestamp was generated. When we updated any value in that row, the timestamp was updated with the new value. Every single time when we update any value in the row, it will generate new timestamp value. Now let us apply this in an original question’s scenario. In that case multiple users are retrieving the same row. Everybody will have the same now same TimeStamp with them. Before any user update any value they should once again retrieve the timestamp from the table and compare with the timestamp they have with them. If both of the timestamp have the same value – the original row has not been updated and we can safely update the row with the new value. After initial update, now the row will contain a new timestamp. Any subsequent update to the same row should also go to the same process of checking the value of the timestamp they have in their memory. In this case, the timestamp from memory will be different from the timestamp in the row. This indicates that row in the table has changed and new updates should not be allowed. I believe timestamp can be very very useful in this kind of scenario. Is there any better alternative? Please leave a comment with the suggestion and I will post on the blog with due credit. Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology

  Read the article

• My program at #MIX10

  - by Laurent Bugnion

  Getting ready to fly to Vegas and MIX10 is really an exciting time! It is also a very busy time, because we are working on a few projects that will be shown on stage, I have my presentation to prepare, and of course as always the book… though these days it has been a bit on the back burner to be honest ;) I arrive in Vegas on Sunday evening around 10PM, so I won’t be able to make it to the traditional IdentityMine dinner this year. I am sure it will be fun nonetheless! My session: Understanding the MVVM pattern http://live.visitmix.com/MIX10/Sessions/EX14 My session is scheduled on the first day, which is awesome, so I am crossing my fingers and hoping that the MIX team doesn’t change it at the last minute… The session will take place on Monday, the 15th of March, 2PM, Room Lagoon F Important: remember that the USA are moving to Summer time on Sunday, so don’t forget to adjust your watches!! Ask the Experts On Monday evening, I will attend the Ask the Experts event, which is taking place between 5Pm and 6:30PM in the main meal hall. This will be a great occasion to grab a beer and talk about code. The Commons MIX has a great place called the Commons, a great location to chill between sessions, and meet tons of interesting people. I love the Commons and plan to spend a lot of time there to meet as many people as I can. Parties I was invited to a few parties, and will do my best to avoid conflicts :) I plan to be at the following events: Silverlight Mixers on Monday evening Insiders MIX party on Tuesday Silverlight partner happy hour on Tuesday too This is a lot of fun, but at the same time we all know that the best value of a conference is to meet people face to face. This is just the right occasion.  And on Thursday… On Thursday I will be attending a Silverlight event at the Luxor. It will be a very busy day, perfect way to end the conference. I fly back home on Friday morning, but due to a long stop in Washington DC (where I intend to go downtown and take pictures… except if the weather is bad, in which case I will probably go to the museum of flight), I will reach home only on Sunday. Getting hold of me The best way to reach me during MIX is to send me a message on Twitter. I will regularly tweet my location at the conference, so make sure to come and meet me. I am eager to make new friends, to talk about the fantastic jobs we did in WPF and Silverlight over the past year and hear your war stories! http://www.twitter.com/lbugnion   Laurent Bugnion (GalaSoft) Subscribe | Twitter | Facebook | Flickr | LinkedIn

  Read the article

• SEASON'S GREETINGS AND HAPPY HOLIDAYS

  - by klaudia.drulis

  p.msonormal { margin:0in; margin-bottom:.0001pt; font-size:11.0pt; font-family:calibri; } li.msonormal { margin:0in; margin-bottom:.0001pt; font-size:11.0pt; font-family:calibri; } p.listparagraph { margin-top:0in; margin-right:0in; margin-bottom:.0001pt; margin-left:.5in; font-size:11.0pt; font-family:calibri; } -- ! Please follow Guidelines for a proper working email ! ___________________________________________________________________________________________________________________ Oracle standard tags   symbol entity Special character Ampersand & & Apostrophe ’ ’ Copyright © © Ellipsis … … Em dash — — En dash – – Euro € € Pound £ £ Left quote “ “ Right quote ” ” Registered trademark ® ® Trademark ™ ℄ Yen ¥ ¥ ___________________________________________________________________________________________________________________ IMPORTANT in creating a link to have a desired color (red, black, etc) that will work in Hotmail, Yahoo, Outlook, and Gmail You MUST Place the inside the Example Click Here The order you must follow to make the colored link appear in browsers. If not the default window link will appear 1. Select the word you want to use for the link 2. Select the desired color, Red, Black, etc 3. Select bold if necessary ___________________________________________________________________________________________________________________ Templates use two sizes of fonts and the sans-serif font tag for the email. All Fonts should be (Arial, Helvetica, sans-serif) tags Normal size reading body fonts should be set to the size of 2. Small font sizes should be set to 1 !!!!!!!DO NOT USE ANY OTHER SIZE FONT FOR THE EMAILS!!!!!!!! ___________________________________________________________________________________________________________________ --   SEASON'S GREETINGS AND HAPPY HOLIDAYS Click here to view the e-card We would like to wish you a Merry Christmas and a prosperous new year. Tanti auguri di buon natale e felice anno nuovo!!! Je vous souhaite de joyeuses fetes, et tous mes voeux de succes pour l'annee a venir ! Tous mes voeux de bonheur, de succes et d’epanouissement pour 2011! Va urez Sarbatori Fericite si un an nou fericit!!! El equipo de Recruitment de Oracle te desea una feliz navidad y un fantastico 2011 Namens het campus recruitment team wensen wij je fijne feestdagen en een uitdagend 2011! In this closing paragraph, reinforce the primary benefit or opportunity being offered. Include a call to action and contact information. Body copy to this point should not exceed 150 words. Wszystkim Sympatykom naszego Blogu skladamy zyczenia Spokojnych i Radosnych Swiat Bozego Narodzenia oraz Pomyslnosci i Sukcesów w Nowym Roku.     Stay Connected: Facebook Experienced YouTube Twitter OracleMix Graduates Copyright © 2010, Oracle and/or its affiliates. All rights reserved.    

  Read the article

• Is Oracle Policy Automation a Fit for My Agency? I'll bet it is.

  - by jeffrey.waterman

  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-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-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;} Recently, I stumbled upon a new(-ish) whitepaper now posted on the Oracle Technology Network around Oracle Policy Automation (OPA). This paper is certain to become a must read for any customer interested in rules automation. What is OPA?  If you are not sitting in your favorite Greek restaurant waiting for that order of Saganaki to appear, OPA is Oracle’s solution for automated streamlining, standardizing, and the maintenance of policy. It is a specialized rules platform that simplifies the automation of rules and policies, putting the analysis in the hands of the analysts, not the IT organization. In other words, OPA allows the organization to be more efficient by eliminating (or at a minimum, reducing the engagement of) the middle man from the process. The whitepaper I mention above is titled, “Is Oracle Policy Automation a Good Fit for My Business?”. This short document walks the reader through use cases and advice for the reader to consider when deciding if OPA is right for their agency. The paper outlines many different scenarios, different uses of OPA in production today and, where OPA may not be a good fit. Many of the use case examples revolve around end user questionnaires or analyst research. What is often overlooked is OPA’s ability to act as a rules engine behind the scenes. That is, take inputs from one source (e.g., personnel data), process that data in OPA and send the output (e.g., pay data with benefits deductions) to a second source. The rules have been automated, no necessary human intervention to perform analysis. A few of my customers have used the embedded OPA solution to improve transaction processing and reduce the time spent analyzing exceptions. I suggest any reader whose organization is reliant on or deals with high complexity, volume or volatility in rules that are based on documentation – or which need to be documented – take a look at Oracle Policy Automation. You can find the white paper on Oracle Technology Network. You can find the white paper in the Oracle Policy Automation of the OTN. You can find more information around OPA on oracle.com. Finally, you can send me a question any time at [email protected] Thank you for reading. If you have any topics around Oracle Applications in the Federal or Public Sector industries you would like to see addressed in this blog, please leave suggestions in the comments section and I will do my best to address in a future post.

  Read the article

• SQL SERVER – Solution – User Not Able to See Any User Created Object in Tables – Security and Permissions Issue

  - by pinaldave

  There is an old quote “A Picture is Worth a Thousand Words”. I believe this quote immensely. Quite often I get phone calls that something is not working if I can help. My reaction is in most of the cases, I need to know more, send me exact error or a screenshot. Until and unless I see the error or reproduce the scenario myself I prefer not to comment. Yesterday I got a similar phone call from an old friend, where he was not sure what is going on. Here is what he said. “When I try to connect to SQL Server, it lets me connect just fine as well let me open and explore the database. I noticed that I do not see any user created instances but when my colleague attempts to connect to the server, he is able to explore the database as well see all the user created tables and other objects. Can you help me fix it? “ My immediate reaction was he was facing security and permission issue. However, to make the same recommendation I suggested that he send me a screenshot of his own SSMS and his friend’s SSMS. After carefully looking at both the screenshots, I was very confident about the issue and we were able to resolve the issue. Let us reproduce the same scenario and many there is some learning for us. Issue: User not able to see user created objects First let us see the image of my friend’s SSMS screen. (Recreated on my machine) Now let us see my friend’s colleague SSMS screen. (Recreated on my machine) You can see that my friend could not see the user tables but his colleague was able to do the same for sure. Now I believed it was a permissions issue. Further to this I asked him to send me another image where I can see the various permissions of the user in the database. My friends screen My friends colleagues screen This indeed proved that my friend did not have access to the AdventureWorks database and because of the same he was not able to access the database. He did have public access which means he will have similar rights as guest access. However, their SQL Server had followed my earlier advise on having limited access for guest access, which means he was not able to see any user created objects. My next question was to validate what kind of access my friend’s colleague had. He replied that the colleague is the admin of the server. I suggested that if my friend was suppose to have admin access to the database, he should request of having admin access to his colleague. My friend promptly asked for the same to his colleague and on following screen he added him as an admin. You can do the same using following T-SQL script as well. USE [AdventureWorks2012] GO ALTER ROLE [db_owner] ADD MEMBER [testguest] GO Once my friend was admin he was able to access all the user objects just like he was expecting. Please note, this complete exercise was done on a development server. One should not play around with security on live or production server. Security is such an issue, which should be left with only senior administrator of the server. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Query, SQL Security, SQL Server, SQL Tips and Tricks, T SQL, Technology

  Read the article

• App_Offline.htm, taking site down for maintenance

  - by Vipin

  There is much simpler and graceful way to shut down a site while doing upgrade to avoid the problem of people accessing site in the middle of a content update.   Basically, if you place file with name 'app_offline.htm' with below contents in the root of a web application directory, ASP.NET will shut-down the application,  and stop processing any new incoming requests for that application.  ASP.NET will also then respond to all requests for dynamic pages in the application by sending back the content of the app_offline.htm file (for example: you might want to have a “site under construction” or “down for maintenance” message).   Then after upgrade, just rename/delete app_offline.htm file…and the site would be back to normal. Just remember that the size of the file should be greater than 512 bytes, doesn't matter even if you add some comments to it to push the byte size as long as it's of the size greater than 512 - it'll work fine.     <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html http://www.w3.org/1999/xhtml"http://www.w3.org/1999/xhtml" ><head>    <title>Maintenance Mode - Outage Message</title></head><body>    <h1>Maintenance Mode</h1>     <p>We're currently undergoing scheduled maintenance. We will come back very shortly.</p>     <p>Sorry for the inconvenience!</p>     <!--            Adding additional hidden content so that IE Friendly Errors don't prevent    this message from displaying (note: it will show a "friendly" 404    error if the content isn't of a certain size).        <h2>Site under maintenance...</h2>      <h2>Site under maintenance...</h2>      <h2>Site under maintenance...</h2>      <h2>Site under maintenance...</h2>      <h2>Site under maintenance...</h2>      <h2>Site under maintenance...</h2>      <h2>Site under maintenance...</h2>      <h2>Site under maintenance...</h2>         --></body></html>

  Read the article

• How To: Spell Check InfoPath web form in SharePoint 2010

  - by Jeremy Ramos

  Originally posted on: http://geekswithblogs.net/JeremyRamos/archive/2013/11/07/how-to-spell-check-infopath-web-form-in-sharepoint-2010.aspxThis is a sequel to my 2011 post about How To: Spell Check InfoPath Web Form in SharePoint. This time I will share how I managed to achieve Spell Checking in SharePoint 2010. This time round, we have changed our Online Forms strategy to use Custom lists instead of Form Libraries. I thought everything will be smooth sailing as we are using all OOTB features. So, we customised a Custom list form using InfoPath and added a few Rich Text Boxes (Spell Check is a requirement for this specific project). All is good in the InfoPath client including the Spell Checker so, happy days, I published straight away.Here comes the surprises now. I browsed to my Custom List and clicked Add New Item. This launched my Form in a modal dialog format. I went to my Rich Text Boxes to check the spell checker, and voila, it's disabled!I tried hacking the FormServer.aspx and the CustomSpellCheckEntirePage.js again but the new FormServer.aspx behaves differently than of MOSS 2007's. I searched for answers in many blogs to no avail. Often ending up being linked to my old blog post. I also tried placing the spell check javascript into a Content Editor Webpart of the Item's New Form and Edit form. It is launching the Spell Check dialog but it's not spellchecking the page correctly.At this point, I decided I needed to get my project across ASAP so enough with experimentations and logged a ticket with Microsoft Premier Support.On a call with the Support Engineer, I browsed through the Custom List and to the item to demonstrate my problem. Suddenly, the Spell Check tab in the toolbar is now Enabled! Surprised? Not much, it's Microsoft!Anyway, to cut my story short, here is a summary of my solution:Navigate to your Custom ListIn the Ribbon Toolbar, navigate to List > Customize List > Form Web Parts > Content Type Forms > (Item) New Form. This will display the newifs.aspx which is the page displayed when Add New Item is clicked. This page, just like any other SharePoint page, contains webparts. In this case, we have the InfoPath Form Web Part.Add a Content Editor Web Part (CEWP) on top of the InfoPath Form Web Part. (A blank CEWP would do for this example)Navigate to Page and click Stop EditingClick Add New Item again and navigate to a Rich Text box. Tadah! The Spell Check tab is now enabled!Do the same steps for the (Item) Edit Form to enable Spell Checks when editing an item.This "no code" solution discovered purely by accident!

  Read the article

• Open source adventures with... wait for it... Microsoft

  - by Jeff

  Last week, Microsoft announced that it was going to open source the rest of the ASP.NET MVC Web stack. The core MVC framework has been open source for a long time now, but the other pieces around it are also now out in the wild. Not only that, but it's not what I call "big bang" open source, where you release the source with each version. No, they're actually committing in real time to a public repository. They're also taking contributions where it makes sense. If that weren't exciting enough, CodePlex, which used to be a part of the team I was on, has been re-org'd to a different part of the company where it is getting the love and attention (and apparently money) that it deserves. For a period of several months, I lobbied to get a PM gig with that product, but got nowhere. A year and a half later, I'm happy to see it finally treated right. In any case, I found a bug in Razor, the rendering engine, before the beta came out. I informally sent the bug info to some people, but it wasn't fixed for the beta. Now, with the project being developed in the open, I was able to submit the issue, and went back and forth with the developer who wrote the code (I met him once at a meet up in Bellevue, I think), and he committed a fix. I tried it a day later, and the bug was gone. There's a lot to learn from all of this. That open source software is surprisingly efficient and often of high quality is one part of it. For me the win is that it demonstrates how open and collaborative processes, as light as possible, lead to better software. In other words, even if this were a project being developed internally, at a bank or something, getting stakeholders involved early and giving people the ability to respond leads to awesomeness. While there is always a place for big thinking, experience has shown time and time again that trying to figure everything out up front takes too long, and rarely meets expectations. This is a lesson that probably half of Microsoft has yet to learn, including the team I was on before I split. It's the reason that team still hasn't shipped anything to general availability. But I've seen what an open and iterative development style can do for teams, at Microsoft and other places that I've worked. When you can have a conversation with people, and take ideas and turn them into code quickly, you're winning. So why don't people like winning? I think there are a lot of reasons, and they can generally be categorized into fear, skepticism and bad experiences. I can't give the Web stack teams enough credit. Not only did they dream big, but they changed a culture that often seems immovable and hopelessly stuck. This is a very public example of this culture change, but it's starting to happen at every scale in Microsoft. It's really interesting to see in a company that has been written off as dead the last decade.

  Read the article

• Workflow versioning

  - by Nitra

  I believe I have a fundamental misunderstanding when it comes to workflow engines which I would appreciate if you could help me sort out. I'm not sure if my misunderstanding is specific to the workflow engine I'm using, or if it's a general misunderstanding. I happen to use Windows Workflow Foundation (WWF). TLDR-version WWF allows you to implement business processes in long-running workflows (think months or even years). When started, the workflows can't be changed. But what business process can't change at any time? And if a business process changes, wouldn't you want your software to reflect this change for already started 'instances' of the business process? What am I missing? Background In WWF you define a workflow by combining a set of activites. There are different types of activities - some of them are for flow control, such as the IfElseActivity and the WhileActivty while others allows you to perform actual tasks, such as the CodeActivity wich allows you to run .NET code and the InvokeWebServiceActivity which allows you to call web services. The activites are combined to a workflow using a visual designer. You pretty much drag-and-drop activities from a toolbox to a designer area and connect the activites to each other. The workflow and activities have input paramters, output parameters and variables. We have a single workflow which sometimes runs in a matter of a few days, but it may run for 5-6 months. WWF takes care of persisting the workflow state (what activity are we currently executing, what are the variable values and so on). So far I think WWF makes sense. Some people will prefer to implement a software representation of a business process using a visual designer over writing all of it in code. So what's the issue then? What I don't really get is the following: WWF is designed to take care of long-running workflows. But at the same time, WWF has no built-in functionality which allows you to modify the running workflows. So if you model a business process using a workflow and run that for 6 months, you better hope that the business process does not change. Because if it do, you'll have to have multiple versions of the workflow executing at the same time. This seems like a fundamental design mistake to me, but at the same time it seems more likely that I've misunderstood something. For us, this has had some real-world effects: We release new versions every month, but some workflows may run for a year. This means that we have several versions of the workflow running in parallell, in other words several versions of the business logics. This is the same as having many differnt versions of your code running in production in the same system at the same time, which becomes a bit hard to understand for users. (depending on on whether they clicked a 'Start' button 9 or 10 months ago, the software will behave differently) Our workflow refers to different types of entities and since WWF now has persisted and serialized these we can't really refactor the entities since then existing workflows can't be resumed (deserialization will fail We've received some suggestions on how to handle this When we create a new version of the workflow, cancel all running workflows and create new ones. But in our workflows there's a lot of manual work involved and if we start from scratch a lot of people has to re-do their work. Track what has been done in the workflow and when you create a new one skip activites which have already been executed. I feel that this alternative may work for simple workflows, but it becomes hairy to automatically figure out what activities to skip if there's major refactoring done to a workflow. When we create a new version of the workflow, upgrade old versions using the new WWF 4.5 functionality for upgrading workflows. But then we would have to skip using the visual designer and write code to inject activities in the right places in the workflow. According to MSDN, this upgrade functionality is only intended for minor bug fixes and not larger changes. What am I missing?

  Read the article

• Arrive steering behavior

  - by dbostream

  I bought a book called Programming game AI by example and I am trying to implement the arrive steering behavior. The problem I am having is that my objects oscillate around the target position; after oscillating less and less for awhile they finally come to a stop at the target position. Does anyone have any idea why this oscillating behavior occur? Since the examples accompanying the book are written in C++ I had to rewrite the code into C#. Below is the relevant parts of the steering behavior: private enum Deceleration { Fast = 1, Normal = 2, Slow = 3 } public MovingEntity Entity { get; private set; } public Vector2 SteeringForce { get; private set; } public Vector2 Target { get; set; } public Vector2 Calculate() { SteeringForce.Zero(); SteeringForce = SumForces(); SteeringForce.Truncate(Entity.MaxForce); return SteeringForce; } private Vector2 SumForces() { Vector2 force = new Vector2(); if (Activated(BehaviorTypes.Arrive)) { force += Arrive(Target, Deceleration.Slow); if (!AccumulateForce(force)) return SteeringForce; } return SteeringForce; } private Vector2 Arrive(Vector2 target, Deceleration deceleration) { Vector2 toTarget = target - Entity.Position; double distance = toTarget.Length(); if (distance > 0) { //because Deceleration is enumerated as an int, this value is required //to provide fine tweaking of the deceleration.. double decelerationTweaker = 0.3; double speed = distance / ((double)deceleration * decelerationTweaker); speed = Math.Min(speed, Entity.MaxSpeed); Vector2 desiredVelocity = toTarget * speed / distance; return desiredVelocity - Entity.Velocity; } return new Vector2(); } private bool AccumulateForce(Vector2 forceToAdd) { double magnitudeRemaining = Entity.MaxForce - SteeringForce.Length(); if (magnitudeRemaining <= 0) return false; double magnitudeToAdd = forceToAdd.Length(); if (magnitudeToAdd > magnitudeRemaining) magnitudeToAdd = magnitudeRemaining; SteeringForce += Vector2.NormalizeRet(forceToAdd) * magnitudeToAdd; return true; } This is the update method of my objects: public void Update(double deltaTime) { Vector2 steeringForce = Steering.Calculate(); Vector2 acceleration = steeringForce / Mass; Velocity = Velocity + acceleration * deltaTime; Velocity.Truncate(MaxSpeed); Position = Position + Velocity * deltaTime; } If you want to see the problem with your own eyes you can download a minimal example here. Thanks in advance.

  Read the article

• Managing game state / 'what to update' within an XNA game 'screen'

  - by codinghands

  Note - having read through other GDev questions suggested when writing this question I'm confident this isn't a dupe. Of course, it's 3am and I'm likely wrong, so please mod as such if so. I'm trying to figure out how best to manage state within my game screens - please bare with me though! At the moment I'm using a heavily modified version of the fantastic game state management example on the XNA site available here. This is working perfectly for my 'Screens' - 'IntroScreen' with some shiny logos, 'TitleScreen' and a 'MenuScreen' stacked on top for the title and menu, 'PlayScreen' for the actual gameplay, etc. Each screen has the a bunch of sprites, and an 'Update' and 'Draw', managed by a 'ScreenManager'. In addition to the above, and as suggested as an answer to my other question here, most screens have a 'GameProcessQueue' class full of 'GameProcess'es which lets me do just about anything (animations, youbetcha!), in any order, in sequence or parallel. Why mention all this? When I talk about managing game state I'm thinking more for complex scenarios within a 'Screen'. 'TitleScreen', 'MenuScreen' and the like are all relatively simple. 'Play Screen' less so. How do people manage the different 'states' within the screen (or whatever you call it) that 'does' gameplay? (for me, the 'PlayScreen') I've thought about the following: Enum of different states in the Screen, 'activeState' enum-type variable, switching on the enum in the Screen Update() loop to determine what Screen Update 'sub'-function is called. I can see this getting hairy pretty fast though as screens get more complex and with the 'PlayScreen' becoming a behemoth mega-class. 'State' class with Update loop - a Screen can have any number of 'States', 1+ of which are 'active'. Screen update loop calls update on all active states. States themselves know which screen they belong to, and may even belong to a 'StateManager' which handles transitioning from one state to the next. Once a state is over it's removed from the ScreenState list. The Screen doesn't need a bunch of GameProcessQueues, each State has its own. Abstract Screen further to be more flexible - I can see the similarities between what I've got (game 'Screens' handled by a ScreenManager) and what I want (states within a screen, and a mechanism to manage them). However at the moment I see 'Screens' as high level and very distinct ('PlayScreen' with baddies != 'MenuScreen' with 4 words and event handlers), where as my proposed 'States' are more intrinsically tied to a specific screen with complex requirements. I think. This is for a turn-based board game, so it's easier to define things as a discrete series of steps (IntroAnimation - P1Turn - P2Turn - P1Turn ... - GameOver - .... Obviously with an open-world RPG things are very different, but any advice in this scenario is appreciated. If I'm just going OOP-crazy please say so. Similarly I'm concious there's a huge amount on this site re: state management. But as my first 'serious' game after a couple of false starts I'd like to get this right, and would rather be harassed and modded down than never ask :)

  Read the article

• How to generate xorg.conf? (X -configure segfaults)

  - by Nicolas Raoul

  My video card is working fine, I have no screen problem. I am trying to generate an xorg.conf so I did: [ Logout ] sudo service gdm stop [ Move away xorg.conf.back and xorg.conf.fglrx-0 that were in /etc/X11 ] sudo dpkg-reconfigure xserver-xorg sudo X -configure But this last command segfaults: X.Org X Server 1.7.6 Release Date: 2010-03-17 X Protocol Version 11, Revision 0 Build Operating System: Linux 2.6.24-27-server i686 Ubuntu Current Operating System: Linux nico 2.6.32-25-generic #44-Ubuntu SMP Fri Sep 17 20:26:08 UTC 2010 i686 Kernel command line: BOOT_IMAGE=/boot/vmlinuz-2.6.32-25-generic root=UUID=7447ab16-3406-442d-81e5-bb6a2d795205 ro quiet splash Build Date: 21 July 2010 12:47:34PM xorg-server 2:1.7.6-2ubuntu7.3 (For technical support please see http://www.ubuntu.com/support) Current version of pixman: 0.16.4 Before reporting problems, check http://wiki.x.org to make sure that you have the latest version. Markers: (--) probed, (**) from config file, (==) default setting, (++) from command line, (!!) notice, (II) informational, (WW) warning, (EE) error, (NI) not implemented, (??) unknown. (==) Log file: "/var/log/Xorg.0.log", Time: Fri Oct 15 16:06:11 2010 List of video drivers: i740 ark geode siliconmotion mach64 s3 r128 apm intel neomagic vesa trident chips s3virge fglrx sis savage rendition i128 tseng ztv mga openchrome radeon ati nv v4l vmware cirrus tdfx nouveau sisusb voodoo fbdev (EE) Can't load FireGL DRM library (libfglrxdrm.so). Backtrace: 0: X (xorg_backtrace+0x3b) [0x80e938b] 1: X (0x8048000+0x61c8d) [0x80a9c8d] 2: (vdso) (__kernel_rt_sigreturn+0x0) [0x34d410] 3: X (xf86CallDriverProbe+0x182) [0x80b82d2] 4: X (DoConfigure+0x1c8) [0x816b898] 5: X (InitOutput+0x1da) [0x80b98aa] 6: X (0x8048000+0x1ebbb) [0x8066bbb] 7: /lib/tls/i686/cmov/libc.so.6 (__libc_start_main+0xe6) [0x467bd6] 8: X (0x8048000+0x1e961) [0x8066961] Segmentation fault at address (nil) Caught signal 11 (Segmentation fault). Server aborting Please consult the The X.Org Foundation support at http://wiki.x.org for help. Please also check the log file at "/var/log/Xorg.0.log" for additional information. ddxSigGiveUp: Closing log Note the line Can't load FireGL DRM library (libfglrxdrm.so) Note: I do have file /usr/lib/fglrx/xorg/modules/linux/libfglrxdrm.so It is strange that it segfaults whereas I can use Gnome with no problem but well... Might be related: I tried to install the driver from ATI's website recently, and from then glxgears crashes at start. How can I generate xorg.conf in those conditions? It might or might not involve solving the segfault problem.

  Read the article

• Commerce Anywhere...Where the Web, Store, Mobile, Social and Call Center Come Together

  - by divya.malik

  I am pleased to introduce guest blogger, Bill Zujewski today. Bill has just joined the Oracle CRM Product Marketing team as part of our recent ATG acquisition. Based in Cambridge, MA Bill was the VP of Product Marketing for ATG and collaborated on eCommerce strategy with some of the best brands in the world. Welcome Bill!! BY BILL ZUJEWSKI "Times are a changing"...or so the song goes. Not long ago, eCommerce just meant having a cool brand and a slick website. Today, customers expect much more... what I think they really want...Commerce Anywhere...a seamless, consistent and personal way to interact or transact business with you and your products, whether they start on the web, go into a store, talk over the phone, access products via their mobile device or on their favorite social media site. They want one more thing... for you to remember them and their history with you... so they can be treated more intelligently and not have to repeat previous interactions. It makes sense to me, I want it too... it saves me time and money. I work with many companies that are trying to understand how to evolve their business structure and technology solutions to meet the challenges of Commerce Anywhere. My advice ... think differently and take a more holistic approach to the customer experience and the cross-channel selling solution. Stop integrating siloed legacy systems and start thinking about a single platform as your new foundation... the e-Commerce platform. I recently wrote a new white paper, Commerce Anywhere - A Business and Technology ! Strategy to Maximize Cross- channel Commerce Growth to help our customers better understand how to create that "Commerce Anywhere" customer experience that customers really want. The paper offers practical insights into an IT transformation that can help you leverage a commerce platform to go beyond the web store front and instead use it to enable rapid expansion into mobile apps, new in-store apps, and interact with your customers through social commerce. Let me know what you think by posting a comment on this blog.

  Read the article

• How to ace Skype Interviews

  - by FelixWehmeyer

  Many companies these days opt to include a Skype interview in the recruitment process, as it comes close to a face-to-face interview without the time and costs involved for both the company and the candidate. In some cases during the recruitment process at Oracle you also might be asked to conduct a Skype interview. To help you get started with this, we researched some websites to give you several tips and tricks. What most of the bloggers say about this topic is collected in this article to help you prepare. It is all about Technology The bit that can make a Skype interview more complicated than a face-to-face or phone interview is the fact you are using additional technology. Always check the video and audio capabilities of your computer to make sure they work properly. Be prepared for connections to be limited during the interview. Using a webcam can also be confusing, if you do not have a lot of experience using it. Make sure you look at the camera and not the monitor to avoid the impression you are looking away. Practice If you do not feel comfortable using the camera, do a mock interview with a friend or family member before you have the actual interview. Be aware that facial impressions or reactions come across differently on a monitor, so make sure to practice how you  come across during the interview. Good lighting in the room also helps you make you look the best for the interviewer. You and your room Dress code, as in any face-to-face interview,is important to think about. Dress the same way as you would for face-to-face interviews and avoid patterns or informal clothing. Another tip,is to be aware of your surroundings. Make sure the room you use looks good on camera, making sure it is neat and tidy, also think about how the walls look behind you. Also make sure you do not get distracted during the interview by anyone or anything, as this will directly have an impact on your interview and your ability to focus and concentrate. What is in a name What goes for any account that you share during the recruitment process, either your email address or Skype name, is to make sure it comes across as professional. Try to avoid using nicknames or strange words in your accounts, stick to using a first name – last name or an abbreviation of the same. If you would like to read more about this topic, have a look at the links below which we used as inspiration for this blog article. 7 Deadly Skype Interview Sins is fun to read and to gives you some good advice to keep in mind. ·         http://www.inc.com/guides/201103/4-tips-for-conducting-a-job-interview-using-skype.html ·         http://blog.simplyhired.com/2012/05/5-tips-to-a-great-skype-interview.html ·         http://www.cnn.com/2011/LIVING/07/11/skype.interview.tips.cb/index.html http://www.ehow.com/how_5648281_prepare-skype-interview.html

  Read the article

• Solution for developers wanting to run a standalone WLS 10.3.6 server against JDev 11.1.1.6.0

  - by Chris Muir

  In my previous post I discussed how to install the 11.1.1.6.0 ADF Runtimes into a standalone WLS 10.3.6 server by using the ADF Runtime installer, not the JDeveloper installer.  Yet there's still a problem for developers here because JDeveloper 11.1.1.6.0 comes coupled with a WLS 10.3.5 server.  What if you want to develop, deploy and test with a 10.3.6 server?  Have we lost the ability to integrate the IDE and the WLS server where we can run and stop the server, deploy our apps automatically the server and more? JDeveloper actually solved this issue sometime back but not many people will have recognized the feature for what it does as it wasn't needed until now. Via the Application Server Navigator you can create 2 types of connections, one to a remote "standalone WLS" and another to an "integrated WLS".  It's this second option that is useful because what we can do is install a local standalone WLS 10.3.6 server on our developer PC, then create a separate "integrated WLS" connection to the standalone server.  Then by accessing your Application's properties through the Application menu -> Application Properties -> Run -> Bind to Integration Application Server option we can choose the newly created WLS server connection to work with our application. In this way JDeveloper will now treat the new server as if it was the integrated WLS.  It will start when we run and deploy our applications, terminate it at request and so on.  Of course don't forget you still need to install the ADF Runtimes for the server to be able to work with ADF applications. Note there is bug 13917844 lurking in the Application Server Navigator for at least JDev 11.1.1.6.0 and earlier.  If you right click the new connection and select "Start Server Instance" it will often start one of the other existing connections instead (typically the original IntegratedWebLogicServer connection).  If you want to manually start the server you can bypass this by using the Run menu -> Start Server Instance option which works correctly.

  Read the article

• Ubuntu systematically losing wired connection

  - by Lukasz Baczynski

  I'm working on 11.10 for few recent days, everything was working perfect until today. Updated ubuntu (some certs were updates as far as i remember) and from this time, wired network stops working randomly and systematically. (All other pcs/macs work fine) From 192.168.0.9 icmp_seq=25 Destination Host Unreachable From 192.168.0.9 icmp_seq=26 Destination Host Unreachable From 192.168.0.9 icmp_seq=27 Destination Host Unreachable From 192.168.0.9 icmp_seq=28 Destination Host Unreachable From 192.168.0.9 icmp_seq=29 Destination Host Unreachable From 192.168.0.9 icmp_seq=30 Destination Host Unreachable From 192.168.0.9 icmp_seq=31 Destination Host Unreachable 64 bytes from 192.168.0.1: icmp_req=32 ttl=64 time=1003 ms 64 bytes from 192.168.0.1: icmp_req=33 ttl=64 time=0.496 ms 64 bytes from 192.168.0.1: icmp_req=34 ttl=64 time=0.576 ms 64 bytes from 192.168.0.1: icmp_req=35 ttl=64 time=0.522 ms 64 bytes from 192.168.0.1: icmp_req=36 ttl=64 time=0.624 ms 64 bytes from 192.168.0.1: icmp_req=37 ttl=64 time=0.625 ms 64 bytes from 192.168.0.1: icmp_req=38 ttl=64 time=0.555 ms It'll work for 20 seconds then it'll stop working for 10-30sec and so on. I've tried setting my router to give static IPs, it doesn't help. NOTHING has been changed since yesterday beside the package update... Here are other settings that may be useful: baka@baka-PC:~/Private/projects/wduk$ lspci -nnk | grep -iA2 net 06:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller [10ec:8168] (rev 06) Subsystem: ASUSTeK Computer Inc. P8P67 and other motherboards [1043:8432] Kernel driver in use: r8169 baka@baka-PC:~/Private/projects/wduk$ ifconfig -a eth0 Link encap:Ethernet HWaddr **Removed MAC address** inet addr:192.168.0.9 Bcast:192.168.0.255 Mask:255.255.255.0 inet6 addr: fe80::ca60:ff:fe0a:85b2/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:6400 errors:0 dropped:6400 overruns:0 frame:6400 TX packets:7085 errors:0 dropped:107 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:4191983 (4.1 MB) TX bytes:886881 (886.8 KB) Interrupt:72 Base address:0x2000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:2522 errors:0 dropped:0 overruns:0 frame:0 TX packets:2522 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:1070130 (1.0 MB) TX bytes:1070130 (1.0 MB) baka@baka-PC:~/Private/projects/wduk$ cat /etc/resolv.conf # Generated by NetworkManager nameserver 8.8.8.8 thanks for help

  Read the article

• Valuing "Working Software over Comprehensive Documentation"

  - by tom.spitz

  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-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-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;} I subscribe to the tenets put forth in the Manifesto for Agile Software Development - http://agilemanifesto.org. As Oracle's chief methodologist, that might seem a self-deprecating attitude. After all, the agile manifesto tells us that we should value "individuals and interactions" over "processes and tools." My job includes process development. I also subscribe to ideas put forth in a number of subsequent works including Balancing Agility and Discipline: A Guide for the Perplexed (Boehm/Turner, Addison-Wesley) and Agile Project Management: Creating Innovative Products (Highsmith, Addison-Wesley). Both of these books talk about finding the right balance between "agility and discipline" or between a "predictive and adaptive" project approach. So there still seems to be a place for us in creating the Oracle Unified Method (OUM) to become the "single method framework that supports the successful implementation of every Oracle product." After all, the real idea is to apply just enough ceremony and produce just enough documentation to suit the needs of the particular project that supports an enterprise in moving toward its desired future state. The thing I've been struggling with - and the thing I'd like to hear from you about right now - is the prevalence of an ongoing obsession with "documents." OUM provides a comprehensive set of guidance for an iterative and incremental approach to engineering and implementing software systems. Our intent is first to support the information technology system implementation and, as necessary, support the creation of documentation. OUM, therefore, includes a supporting set of document templates. Our guidance is to employ those templates, sparingly, as needed; not create piles of documentation that you're not gonna (sic) need. In other words, don't serve the method, make the method serve you. Yet, there seems to be a "gimme" mentality in some circles that if you give me a sample document - or better yet - a repository of samples - then I will be able to do anything cheaply and quickly. The notion is certainly appealing AND reuse can save time. Plus, documents are a lowest common denominator way of packaging reusable stuff. However, without sustained investment and management I've seen "reuse repositories" turn quickly into garbage heaps. So, I remain a skeptic. I agree that providing document examples that promote consistency is helpful. However, there may be too much emphasis on the documents themselves and not enough on creating a system that meets the evolving needs of the business. How can we shift the emphasis toward working software and away from our dependency on documents - especially on large, complex implementation projects - while still supporting the need for documentation? I'd like to hear your thoughts.

  Read the article

• GUI device for throwing a ball

  - by Fredrik Johansson

  The hero has a ball, which shall be thrown with accuracy in a court on iPhone/iPad. The player is seen from above, in a 2D view. In game play, the player reach is between 1/15 and 1/6 of the height of the iPhone screen. The player will run, and try to outmaneuver his opponent, and then throw the ball at a specific location, which is guarded by the opponent (which is also shown on the screen). The player is controlled by a joystick, and that works ok, but how shall I control the stick? Maybe someone can propose a third control method? I've tried the following two approaches: Joystick: Hero has a reach of 1 meter, and this reach is marked with a semi-opaque circle around the player. The ball can be moved by a joystick. When the joystick is moved south, the ball is moved south within the reach circle. There is a direct coupling with the joystick and the position of the ball. I.e. when the joystick is moved max south, the ball is max south within the player reach. At each touch update the speed is calculated, and the Box2d ball position and ball speed are updated. NB, the ball will never be moved outside the reach as long as the player push the joystick. The ball is thrown by swiping the joystick to make the ball move, and then releasing the joystick. At release, the ball will get a smoothed speed of the joystick. Joystick Problem: The throwing accuracy gets bad, because the joystick can not be that big, and a small movement results in quite a large movement of the ball. If the user does not release before the end of the joystick maximum end point, the ball will stop, and when the user releases the joystick the speed of the ball will be zero. Bad... Touch pad A force is applied to the ball by a sweep on a touchpad. The ball is released when the sweep is ended, or when the ball is moved outside the player reach. As there is no one to one mapping between the swipe and the ball position, the precision can be improved. A large swipe can result in a small ball movement. Touch Pad Problem A touchpad is less intuitive. Users do not seem to know what to do with the touch pad. Some tap the touchpad, and then the ball just falls to the ground. As there is no one-to-one mapping, the ball can be moved outside the reach, and then it will just fall to the ground. It's a bit hard to control the ball, especially if the player also moves.

  Read the article

• Exploring TCP throughput with DTrace

  - by user12820842

  One key measure to use when assessing TCP throughput is assessing the amount of unacknowledged data in the pipe. This is sometimes termed the Bandwidth Delay Product (BDP) (note that BDP is often used more generally as the product of the link capacity and the end-to-end delay). In DTrace terms, the amount of unacknowledged data in bytes for the connection is the different between the next sequence number to send and the lowest unacknoweldged sequence number (tcps_snxt - tcps_suna). According to the theory, when the number of unacknowledged bytes for the connection is less than the receive window of the peer, the path bandwidth is the limiting factor for throughput. In other words, if we can fill the pipe without the peer TCP complaining (by virtue of its window size reaching 0), we are purely bandwidth-limited. If the peer's receive window is too small however, the sending TCP has to wait for acknowledgements before it can send more data. In this case the round-trip time (RTT) limits throughput. In such cases the effective throughput limit is the window size divided by the RTT, e.g. if the window size is 64K and the RTT is 0.5sec, the throughput is 128K/s. So a neat way to visually determine if the receive window of clients may be too small should be to compare the distribution of BDP values for the server versus the client's advertised receive window. If the BDP distribution overlaps the send window distribution such that it is to the right (or lower down in DTrace since quantizations are displayed vertically), it indicates that the amount of unacknowledged data regularly exceeds the client's receive window, so that it is possible that the sender may have more data to send but is blocked by a zero-window on the client side. In the following example, we compare the distribution of BDP values to the receive window advertised by the receiver (10.175.96.92) for a large file download via http. # dtrace -s tcp_tput.d ^C BDP(bytes) 10.175.96.92 80 value ------------- Distribution ------------- count -1 | 0 0 | 6 1 | 0 2 | 0 4 | 0 8 | 0 16 | 0 32 | 0 64 | 0 128 | 0 256 | 3 512 | 0 1024 | 0 2048 | 9 4096 | 14 8192 | 27 16384 | 67 32768 |@@ 1464 65536 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ 32396 131072 | 0 SWND(bytes) 10.175.96.92 80 value ------------- Distribution ------------- count 16384 | 0 32768 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ 17067 65536 | 0 Here we have a puzzle. We can see that the receiver's advertised window is in the 32768-65535 range, while the amount of unacknowledged data in the pipe is largely in the 65536-131071 range. What's going on here? Surely in a case like this we should see zero-window events, since the amount of data in the pipe regularly exceeds the window size of the receiver. We can see that we don't see any zero-window events since the SWND distribution displays no 0 values - it stays within the 32768-65535 range. The explanation is straightforward enough. TCP Window scaling is in operation for this connection - the Window Scale TCP option is used on connection setup to allow a connection to advertise (and have advertised to it) a window greater than 65536 bytes. In this case the scaling shift is 1, so this explains why the SWND values are clustered in the 32768-65535 range rather than the 65536-131071 range - the SWND value needs to be multiplied by two since the reciever is also scaling its window by a shift factor of 1. Here's the simple script that compares BDP and SWND distributions, fixed to take account of window scaling. #!/usr/sbin/dtrace -s #pragma D option quiet tcp:::send / (args[4]-tcp_flags & (TH_SYN|TH_RST|TH_FIN)) == 0 / { @bdp["BDP(bytes)", args[2]-ip_daddr, args[4]-tcp_sport] = quantize(args[3]-tcps_snxt - args[3]-tcps_suna); } tcp:::receive / (args[4]-tcp_flags & (TH_SYN|TH_RST|TH_FIN)) == 0 / { @swnd["SWND(bytes)", args[2]-ip_saddr, args[4]-tcp_dport] = quantize((args[4]-tcp_window)*(1 tcps_snd_ws)); } And here's the fixed output. # dtrace -s tcp_tput_scaled.d ^C BDP(bytes) 10.175.96.92 80 value ------------- Distribution ------------- count -1 | 0 0 | 39 1 | 0 2 | 0 4 | 0 8 | 0 16 | 0 32 | 0 64 | 0 128 | 0 256 | 3 512 | 0 1024 | 0 2048 | 4 4096 | 9 8192 | 22 16384 | 37 32768 |@ 99 65536 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ 3858 131072 | 0 SWND(bytes) 10.175.96.92 80 value ------------- Distribution ------------- count 512 | 0 1024 | 1 2048 | 0 4096 | 2 8192 | 4 16384 | 7 32768 | 14 65536 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ 1956 131072 | 0

  Read the article

• Configure Calendar Server 7 to Use the davUniqueId Attribute

  - by dabrain

  Starting with Calendar Server 7 Update 3 (Patch 08) we introduce a new attribute davUniqueId in the davEntity objectclass, to use as the unique identifier.  The reason behind this is quite simple, the LDAP operational attribute nsUniqueId  has been chosen as the default value used for the unique identifier. It was discovered that this choice has a potential serious downside. The problem with using nsUniqueId is that if the LDAP entry for a user, group, or resource is deleted and recreated in LDAP, the new entry would receive a different nsUniqueId value from the Directory Server, causing a disconnect from the existing account in the calendar database. As a result, recreated users cannot access their existing calendars. How To Configure Calendar Server to Use the davUniqueId Attribute? Populate the davUniqueId to the ldap users. You can create a LDIF output file only or (-x option) directly run the ldapmodify from the populate-davuniqueid shell script. # ./populate-davuniqueid -h localhost -p 389 -D "cn=Directory Manager" -w <passwd> -b "o=red" -O -o /tmp/out.ldif The ldapmodify might failed like below, in that case the LDAP entry already have the 'daventity' objectclass, in those cases run populate-davuniqueid script without the -O option. # ldapmodify -x -h localhost -p 389 -D "cn=Directory Manager" -w <passwd> -c -f /tmp/out.ldif modifying entry "uid=mparis,ou=People,o=vmdomain.tld,o=red" ldapmodify: Type or value exists (20) In this case the user 'mparis' already have the objectclass 'daventity', ldapmodify do not take care of this DN and just take the next DN (if you start ldapmodify with -c option otherwise it stop's completely) dn: uid=mparis,ou=People,o=vmdomain.tld,o=red changetype: modify add: objectclass objectclass: daventity - add: davuniqueid davuniqueid: 01a2c501-af0411e1-809de373-18ff5c8d Even run populate-davuniqueid without -O option or changing the outputfile to dn: uid=mparis,ou=People,o=vmdomain.tld,o=red changetype: modify add: davuniqueid davuniqueid: 01a2c501-af0411e1-809de373-18ff5c8d The ldapmodify works fine now. The only issue I see here is you need verify which user might need the 'daventity' objectclass as well. On the other hand start without the objectclass and only add the objectclass for the users where you get 'Objectclass violation' report. That's indicate the objectclass is missing. # ldapmodify -x -h localhost -p 389 -D "cn=Directory Manager" -w <passwd> -c -f /tmp/out.ldif modifying entry "uid=mparis,ou=People,o=vmdomain.tld,o=red" Now it is time to change the configuration to use the davuniquid attribute # ./davadmin config modify -o davcore.uriinfo.permanentuniqueid -v davuniqueid It is also needed to modfiy the search filter to use davuniqueid instead of nsuniqueid # ./davadmin config modify -o davcore.uriinfo.subjectattributes -v "cn davstore icsstatus mail mailalternateaddress davUniqueId  owner preferredlanguageuid objectclass ismemberof uniquemember memberurl mgrprfc822mailmember" Afterward IWC Calendar works fine and my test user able to access all his old events.

  Read the article

• Are Chief Digital Officers the Result of CMO/CIO Refusal to Change?

  - by Mike Stiles

  Apparently CDO no longer just stands for “Collateralized Debt Obligations.”  It stands for Chief Digital Officer. And they’re the ones who are supposed to answer the bat signal CEO’s are throwing into the sky, swoop in and POW! drive the transition of the enterprise to integrated digital systems. So imagine being a CMO or a CIO at such an enterprise and realizing it’s been determined that you are not the answer that’s needed. In fact, IntelligentHQ author Ashley Friedlein points out the very rise of the CDO is an admission of C-Suite failure to become savvy enough, quickly enough in modern technology. Is that fair? Despite the repeated drumbeat that CMO’s and CIO’s must enter a new era of cooperation and collaboration to enact the social-enabled enterprise, the verdict seems to be that if it’s happening at all, it’s not happening fast enough. Therefore, someone else is needed with the authority to make things happen. So who is this relatively new beast? Gartner VP David Willis says, “The Chief Digital Officer plays in the place where the enterprise meets the customer, where the revenue is generated, and the mission accomplished.” In other words, where the rubber meets the road. They aren’t just another “C” heading up a unit. They’re the CEO’s personal SWAT team, able to call the shots necessary across all units to affect what has become job one…customer experience. And what are the CMO’s and CIO’s doing while this is going on? Playing corporate games. Accenture reports 38% of CMOs say IT deliberately keeps them out of the loop, with 35% saying marketing’s needs aren’t a very high priority. 31% of CIOs say marketers don’t understand tech and regularly go around them for solutions. Fun! Meanwhile the CEO feels the need to bring in a parental figure to pull it all together. Gartner thinks 25% of all orgs will have a CDO by 2015 as CMO’s and particularly CIO’s (Peter Hinssen points out many CDO’s are coming “from anywhere but IT”) let the opportunity to be the agent of change their company needs slip away. Perhaps most interestingly, these CDO’s seem to be entering the picture already on the fast track. One consultancy counted 7 instances of a CDO moving into the CEO role, which, as this Wired article points out, is pretty astounding since nobody ever heard of the job a few years ago. And vendors are quickly figuring out that this is the person they need to be talking to inside the brand. The position isn’t without its critics. Forrester’s Martin Gill says the reaction from executives at some traditional companies to someone being brought in to be in charge of digital might be to wash their own hands of responsibility for all things digital – a risky maneuver given the pervasiveness of digital in business. They might not even be called Chief Digital Officers. They might be the Chief Customer Officer, Chief Experience Officer, etc. You can call them Twinkletoes if you want to, but essentially anyone who has the mandate direct from the CEO to enact modern technology changes not currently being championed by the CMO or CIO can be regarded as “boss.” @mikestiles @oraclesocialPhoto: freedigitalphotos.net

  Read the article

• Fan not detected by lm-sensors

  - by OrangeTux

  My fan is blowing hard, while my cpu temperature is 32 degrees I tried a lot of things to control my fan. Changed grub file GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi= pci=noacpi" _ GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=\"Linux\"" Ran sensors-detect : To load everything that is needed, add this to /etc/modules: #----cut here---- # Chip drivers coretemp #----cut here---- If you have some drivers built into your kernel, the list above will contain too many modules. Skip the appropriate ones! Do you want to add these lines automatically to /etc/modules? (yes/NO) Unloading i2c-dev... OK Unloading i2c-i801... OK Unloading cpuid... OK Ran sensors: acpitz-virtual-0 Adapter: Virtual device temp1: +34.0°C (crit = +90.0°C) coretemp-isa-0000 Adapter: ISA adapter Core 0: +34.0°C (high = +80.0°C, crit = +90.0°C) Core 2: +34.0°C (high = +80.0°C, crit = +90.0°C) Ran sudo start module-init-tools and sudo start module-init-tools module-init-tools stop/waiting As you can see my fan isn't detected. Running fancontrol gives me this: Loading configuration from /etc/fancontrol ... Error: Can't read configuration file Can you help me, please? I cannot use my laptop now in class. Thanks in advance. My system 00:00.0 Host bridge: Intel Corporation Core Processor DRAM Controller (rev 02) 00:01.0 PCI bridge: Intel Corporation Core Processor PCI Express x16 Root Port (rev 02) 00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 02) 00:16.0 Communication controller: Intel Corporation 5 Series/3400 Series Chipset HECI Controller (rev 06) 00:1a.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05) 00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 05) 00:1c.0 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 (rev 05) 00:1c.2 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 3 (rev 05) 00:1d.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05) 00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev a5) 00:1f.0 ISA bridge: Intel Corporation Mobile 5 Series Chipset LPC Interface Controller (rev 05) 00:1f.2 SATA controller: Intel Corporation 5 Series/3400 Series Chipset 4 port SATA AHCI Controller (rev 05) 00:1f.3 SMBus: Intel Corporation 5 Series/3400 Series Chipset SMBus Controller (rev 05) 01:00.0 VGA compatible controller: ATI Technologies Inc Manhattan [Mobility Radeon HD 5400 Series] 01:00.1 Audio device: ATI Technologies Inc Manhattan HDMI Audio [Mobility Radeon HD 5000 Series] 02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 02) 03:00.0 Network controller: Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller (rev 01) 7f:00.0 Host bridge: Intel Corporation Core Processor QuickPath Architecture Generic Non-core Registers (rev 05) 7f:00.1 Host bridge: Intel Corporation Core Processor QuickPath Architecture System Address Decoder (rev 05) 7f:02.0 Host bridge: Intel Corporation Core Processor QPI Link 0 (rev 05) 7f:02.1 Host bridge: Intel Corporation Core Processor QPI Physical 0 (rev 05) 7f:02.2 Host bridge: Intel Corporation Core Processor Reserved (rev 05) 7f:02.3 Host bridge: Intel Corporation Core Processor Reserved (rev 05)

  Read the article

• SQL Authority News – Presenting at SQL Bangalore on May 3, 2014 – Performing an Effective Presentation

  - by Pinal Dave

  SQL Bangalore is a wonderful community and we always have a great response when we present on technology. It is SQL User Group and we discuss everything SQL there. This month we have SQL Server 2014 theme and we are going to have a community launch on this subject. We have the best of the best speakers presenting on SQL Server 2014 technology. Looking at the whole line of celebrity speakers, I have decided not to present on SQL Server. I will be presenting on the performance tuning subject, but with the twist of soft skills. I will be presenting on “Performing an Effective Presentation“. Trust me, you do not want to miss this presentation, I will be presenting on how to present effectively when presenting SQL Server topics. What this session will NOT have I personally believe that we all are good presenters most of the time. We can all easily call out if someone is bad presenter. There is no point talking about basics like bigger bullet points, talk loudly, talk with confidence, use better analogies etc. In simple words – this is not going to some philosophy session and boring notes. What this session will have Well, this session will tell stories of my life. It will tell how we can present about technology and SQL Server with the help of stories and personal experience. I am going to tell stories about two legends  who have inspired me. Right after that we will be doing two exercises together where we will learn quickly and effectively, how to become better speaker – instantly! There is no video recording of this session. If you want to get resources from this session, please sign up my newsletter at http://bit.ly/sqllearn Here are few of the slides from this presentation: Here is the details about the event and location Venue:Microsoft Corporation, Signature Building,Embassy Golf Links Business Park, Intermediate Ring Road, Domlur, Bangalore – 560071 The agenda is amazing – we have top line SQL Speakers. Everyone is welcome and don’t forget to get your friend along for this event. Loads to learn and tons to share !!! Keynote (20 mins) by Anupam Tiwari – Business Program Manager – GTSC Backup Enhancements with SQL Server 2014 by Amit Banerjee – PFE Microsoft Performance Enhancements with SQL Server 2014 by Sourabh Agarwal - PFE Microsoft LUNCH BREAK Performing an effective Presentation by Pinal Dave – Community Member (SQLAuthority.com) InMemory Enhancements with SQL Server 2014 by Balmukund Lakhani – Support Escalation Engg. Microsoft Some more lesser known enhancements with SQL Server 2014 by Vinod Kumar – Technical Architect Microsoft MTC Power Packed – Power BI with SQL Server by Kane Conway – Support Escalation Engg. Microsoft I am very big fan of Amit, Balmukund and Vinod – I have always watched their session and this time, I am going to once again attend their session without missing a single min. They are SQL legends, I am going to be there and learn when they are sharing their knowledge.  Reference: Pinal Dave (http://blog.sqlauthority.com)Filed under: PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, SQLAuthority Author Visit, T SQL

  Read the article

< Previous Page | 385 386 387 388 389 390 391 392 393 394 395 396  | Next Page >