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• Bingbot seems to be adding "ForceRecrawl: 0" to URLs when crawling my sites

  - by Louis Somers

  I'm seeing this in the iis-logs of two websites that I maintain: GET /an/existing/page/on/my/site+ForceRecrawl:+0 - 80 - 207.46.195.105 HTTP/1.1 Mozilla/5.0+(compatible;+bingbot/2.0;++http://www.bing.com/bingbot.htm) I get about one or two of these per day from these IP addresses: 207.46.195.105, 65.52.110.190.. an more, all belonging to msnbot-ip.search.msn.com Probably Microsoft has a bug in their crawler? Any way, doing a search on "ForceRecrawl: 0" in major search engines comes up with a bunch of random sites. Doing the search on StackOverflow or here gave no results (to my amazement). Am I the only one seeing this? I first noticed these on the 9th of this month, and I'm seeing them pass almost daily since... Another thing that I think is crazy, is that the URL http://www.bing.com/bingbot.htm redirects to mail.live.com (hotmail). Currently I'm returning 404's but I'm considering to catch these, strip the trailing " ForceRecrawl: 0" and process as if it were a legitimate url. Could anyone shed some light on this? Could it have to do with some configuration or so in Bing's Webmaster Tools?

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• Re-running SSRS subscription jobs that have failed

  - by Rob Farley

  Sometimes, an SSRS subscription for some reason. It can be annoying, particularly as the appropriate response can be hard to see immediately. There may be a long list of jobs that failed one morning if a Mail Server is down, and trying to work out a way of running each one again can be painful. It’s almost an argument for using shared schedules a lot, but the problem with this is that there are bound to be other things on that shared schedule that you wouldn’t want to be re-run. Luckily, there’s a table in the ReportServer database called dbo.Subscriptions, which is where LastStatus of the Subscription is stored. Having found the subscriptions that you’re interested in, finding the SQL Agent Jobs that correspond to them can be frustrating. Luckily, the jobstep command contains the subscriptionid, so it’s possible to look them up based on that. And of course, once the jobs have been found, they can be executed easily enough. In this example, I produce a list of the commands to run the jobs. I can copy the results out and execute them. select 'exec sp_start_job @job_name = ''' + cast(j.name as varchar(40)) + '''' from msdb.dbo.sysjobs j  join  msdb.dbo.sysjobsteps js on js.job_id = j.job_id join  [ReportServer].[dbo].[Subscriptions] s  on js.command like '%' + cast(s.subscriptionid as varchar(40)) + '%' where s.LastStatus like 'Failure sending mail%'; Another option could be to return the job step commands directly (js.command in this query), but my preference is to run the job that contains the step. Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!

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• What's the best license for my website?

  - by John Maxim

  I have developed a unique website but do not have a lot of fund to protect it with trademark or patents. I'm looking for suggestions so that when my supervisor gets my codes, some laws restrict anyone from copying it and claim their work. I'm in the middle of thinking, making the application a commercial one or never allowing it to be copied at all. What kind of steps am I required to take in order to make full measurements so my applications are fully-protected? I've come across a few, one under my consideration is MIT license. Some say we can have a mixture of both commercial and MIT. I would also like to be able to distribute some functions so it can be modified by others but I'd still retain the ownership. Last but not least, it's confusing when I think of protecting the whole website, and protecting codes by codes in division. How should we go about this? Thanks. N.B I have to pass it over to the supervisor as this is a Uni project. I need this to be done within 2 weeks. So time to get my App protected is a factor here.

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• Understanding C# async / await (2) Awaitable / Awaiter Pattern

  - by Dixin

  What is awaitable Part 1 shows that any Task is awaitable. Actually there are other awaitable types. Here is an example: Task<int> task = new Task<int>(() => 0); int result = await task.ConfigureAwait(false); // Returns a ConfiguredTaskAwaitable<TResult>. The returned ConfiguredTaskAwaitable<TResult> struct is awaitable. And it is not Task at all: public struct ConfiguredTaskAwaitable<TResult> { private readonly ConfiguredTaskAwaiter m_configuredTaskAwaiter; internal ConfiguredTaskAwaitable(Task<TResult> task, bool continueOnCapturedContext) { this.m_configuredTaskAwaiter = new ConfiguredTaskAwaiter(task, continueOnCapturedContext); } public ConfiguredTaskAwaiter GetAwaiter() { return this.m_configuredTaskAwaiter; } } It has one GetAwaiter() method. Actually in part 1 we have seen that Task has GetAwaiter() method too: public class Task { public TaskAwaiter GetAwaiter() { return new TaskAwaiter(this); } } public class Task<TResult> : Task { public new TaskAwaiter<TResult> GetAwaiter() { return new TaskAwaiter<TResult>(this); } } Task.Yield() is a another example: await Task.Yield(); // Returns a YieldAwaitable. The returned YieldAwaitable is not Task either: public struct YieldAwaitable { public YieldAwaiter GetAwaiter() { return default(YieldAwaiter); } } Again, it just has one GetAwaiter() method. In this article, we will look at what is awaitable. The awaitable / awaiter pattern By observing different awaitable / awaiter types, we can tell that an object is awaitable if It has a GetAwaiter() method (instance method or extension method); Its GetAwaiter() method returns an awaiter. An object is an awaiter if: It implements INotifyCompletion or ICriticalNotifyCompletion interface; It has an IsCompleted, which has a getter and returns a Boolean; it has a GetResult() method, which returns void, or a result. This awaitable / awaiter pattern is very similar to the iteratable / iterator pattern. Here is the interface definitions of iteratable / iterator: public interface IEnumerable { IEnumerator GetEnumerator(); } public interface IEnumerator { object Current { get; } bool MoveNext(); void Reset(); } public interface IEnumerable<out T> : IEnumerable { IEnumerator<T> GetEnumerator(); } public interface IEnumerator<out T> : IDisposable, IEnumerator { T Current { get; } } In case you are not familiar with the out keyword, please find out the explanation in Understanding C# Covariance And Contravariance (2) Interfaces. The “missing” IAwaitable / IAwaiter interfaces Similar to IEnumerable and IEnumerator interfaces, awaitable / awaiter can be visualized by IAwaitable / IAwaiter interfaces too. This is the non-generic version: public interface IAwaitable { IAwaiter GetAwaiter(); } public interface IAwaiter : INotifyCompletion // or ICriticalNotifyCompletion { // INotifyCompletion has one method: void OnCompleted(Action continuation); // ICriticalNotifyCompletion implements INotifyCompletion, // also has this method: void UnsafeOnCompleted(Action continuation); bool IsCompleted { get; } void GetResult(); } Please notice GetResult() returns void here. Task.GetAwaiter() / TaskAwaiter.GetResult() is of such case. And this is the generic version: public interface IAwaitable<out TResult> { IAwaiter<TResult> GetAwaiter(); } public interface IAwaiter<out TResult> : INotifyCompletion // or ICriticalNotifyCompletion { bool IsCompleted { get; } TResult GetResult(); } Here the only difference is, GetResult() return a result. Task<TResult>.GetAwaiter() / TaskAwaiter<TResult>.GetResult() is of this case. Please notice .NET does not define these IAwaitable / IAwaiter interfaces at all. As an UI designer, I guess the reason is, IAwaitable interface will constraint GetAwaiter() to be instance method. Actually C# supports both GetAwaiter() instance method and GetAwaiter() extension method. Here I use these interfaces only for better visualizing what is awaitable / awaiter. Now, if looking at above ConfiguredTaskAwaitable / ConfiguredTaskAwaiter, YieldAwaitable / YieldAwaiter, Task / TaskAwaiter pairs again, they all “implicitly” implement these “missing” IAwaitable / IAwaiter interfaces. In the next part, we will see how to implement awaitable / awaiter. Await any function / action In C# await cannot be used with lambda. This code: int result = await (() => 0); will cause a compiler error: Cannot await 'lambda expression' This is easy to understand because this lambda expression (() => 0) may be a function or a expression tree. Obviously we mean function here, and we can tell compiler in this way: int result = await new Func<int>(() => 0); It causes an different error: Cannot await 'System.Func<int>' OK, now the compiler is complaining the type instead of syntax. With the understanding of the awaitable / awaiter pattern, Func<TResult> type can be easily made into awaitable. GetAwaiter() instance method, using IAwaitable / IAwaiter interfaces First, similar to above ConfiguredTaskAwaitable<TResult>, a FuncAwaitable<TResult> can be implemented to wrap Func<TResult>: internal struct FuncAwaitable<TResult> : IAwaitable<TResult> { private readonly Func<TResult> function; public FuncAwaitable(Func<TResult> function) { this.function = function; } public IAwaiter<TResult> GetAwaiter() { return new FuncAwaiter<TResult>(this.function); } } FuncAwaitable<TResult> wrapper is used to implement IAwaitable<TResult>, so it has one instance method, GetAwaiter(), which returns a IAwaiter<TResult>, which wraps that Func<TResult> too. FuncAwaiter<TResult> is used to implement IAwaiter<TResult>: public struct FuncAwaiter<TResult> : IAwaiter<TResult> { private readonly Task<TResult> task; public FuncAwaiter(Func<TResult> function) { this.task = new Task<TResult>(function); this.task.Start(); } bool IAwaiter<TResult>.IsCompleted { get { return this.task.IsCompleted; } } TResult IAwaiter<TResult>.GetResult() { return this.task.Result; } void INotifyCompletion.OnCompleted(Action continuation) { new Task(continuation).Start(); } } Now a function can be awaited in this way: int result = await new FuncAwaitable<int>(() => 0); GetAwaiter() extension method As IAwaitable shows, all that an awaitable needs is just a GetAwaiter() method. In above code, FuncAwaitable<TResult> is created as a wrapper of Func<TResult> and implements IAwaitable<TResult>, so that there is a  GetAwaiter() instance method. If a GetAwaiter() extension method  can be defined for Func<TResult>, then FuncAwaitable<TResult> is no longer needed: public static class FuncExtensions { public static IAwaiter<TResult> GetAwaiter<TResult>(this Func<TResult> function) { return new FuncAwaiter<TResult>(function); } } So a Func<TResult> function can be directly awaited: int result = await new Func<int>(() => 0); Using the existing awaitable / awaiter - Task / TaskAwaiter Remember the most frequently used awaitable / awaiter - Task / TaskAwaiter. With Task / TaskAwaiter, FuncAwaitable / FuncAwaiter are no longer needed: public static class FuncExtensions { public static TaskAwaiter<TResult> GetAwaiter<TResult>(this Func<TResult> function) { Task<TResult> task = new Task<TResult>(function); task.Start(); return task.GetAwaiter(); // Returns a TaskAwaiter<TResult>. } } Similarly, with this extension method: public static class ActionExtensions { public static TaskAwaiter GetAwaiter(this Action action) { Task task = new Task(action); task.Start(); return task.GetAwaiter(); // Returns a TaskAwaiter. } } an action can be awaited as well: await new Action(() => { }); Now any function / action can be awaited: await new Action(() => HelperMethods.IO()); // or: await new Action(HelperMethods.IO); If function / action has parameter(s), closure can be used: int arg0 = 0; int arg1 = 1; int result = await new Action(() => HelperMethods.IO(arg0, arg1)); Using Task.Run() The above code is used to demonstrate how awaitable / awaiter can be implemented. Because it is a common scenario to await a function / action, so .NET provides a built-in API: Task.Run(): public class Task2 { public static Task Run(Action action) { // The implementation is similar to: Task task = new Task(action); task.Start(); return task; } public static Task<TResult> Run<TResult>(Func<TResult> function) { // The implementation is similar to: Task<TResult> task = new Task<TResult>(function); task.Start(); return task; } } In reality, this is how we await a function: int result = await Task.Run(() => HelperMethods.IO(arg0, arg1)); and await a action: await Task.Run(() => HelperMethods.IO());

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• Why does my computer crash when I minimise the last window?

  - by TRiG

  I am runnung Ubuntu 12.04 LTS. If I have a few windows open (say four to six, not a large amount), and minimise all by pressing Ctrl+Super+D, they all minimise immediately with no problems. However, if I minimise them one at a time, by clicking the minimise button with my mouse, the last one often hangs. Usually it will appear as a ghost on the screen for a while, semi-minimised (in other words, shrunk toward the Unity launcher bar, half-size or smaller, and semi-transparent). Usually it will eventually clear; sometimes the computer just freezes and I have to restart it. It doesn’t seem to matter what the window actually is. Just now, I had to restart my computer with Skype* semi-minimised. I’ve seen it freeze before with the Terminal semi-minimised (and the Terminal wasn’t even doing anything at the time). The only pattern is that it’s always the last window minimised which freezes, and that minimising all windows together using the keyboard shortcut works fine. What on earth is going on, and how can I stop it? * I hate Skype, but I need it for work.

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• Expanding the Oracle Enterprise Repository with functional documentation by Marc Kuijpers

  - by JuergenKress

  Introduction Have you ever experienced the challenge to map both your functional and technical assets in one software package? Finding a software package that is able to describe the metadata about these assets and their mutual relationships? And if you found the correct software package, was it maintainable? The Oracle Enterprise Repository (OER) is a powerful SOA repository. Its core task is to map and visualize the interaction between technical assets generated by the SOA Suite and OSB. However, OER can be configured to not only contain these technical assets, but also to contain functional assets, i.e.: functional designs, use cases and a logical data model. Now that’s interesting! OER is able to show all the assets in your system and, if necessary, zoom in on one of the assets and their mutual relationships (Figure 1). This opens a set of doors to powerful features, e.g.: Impact analsysis If a functional design is adjusted, which other functional designs and use cases do I need to adjust? Traceability If a web service generates an error, in which functional and technical designs is the web service described This sounds great, but how do we get all the functional and technical documents in OER, and how are we going to keep this repository up-to-date? Read the full article. SOA & BPM Partner Community For regular information on Oracle SOA Suite become a member in the SOA & BPM Partner Community for registration please visit  www.oracle.com/goto/emea/soa (OPN account required) If you need support with your account please contact the Oracle Partner Business Center. Blog Twitter LinkedIn Mix Forum Technorati Tags: OER,SOA Governance,SOA Community,Oracle SOA,Oracle BPM,Community,OPN,Jürgen Kress

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• Unable to start Apache on Ubuntu 12.10: no listening sockets available

  - by michalstanko

  I'm unable to start apache2 installed using apt-get. I'm getting the very same error on 2 separate Ubuntu 12.10 installations, one on my desktop PC, the other one running in VirtualBox: michal@michaltest:~$ sudo service apache2 start * Starting web server apache2 apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1 for ServerName no listening sockets available, shutting down Unable to open logs Action 'start' failed. The Apache error log may have more information. [fail] lsof says: michal@michaltest:/var/log/apache2$ sudo lsof -i :80 COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME ubuntu-ge 2074 michal 11u IPv4 23978 0t0 TCP michaltest.local:47578->mulberry.canonical.com:http (CLOSE_WAIT) firefox 25194 michal 71u IPv4 42477 0t0 TCP michaltest.local:59793->69.59.197.29:http (ESTABLISHED) firefox 25194 michal 76u IPv4 41834 0t0 TCP michaltest.local:59698->69.59.197.29:http (ESTABLISHED) gvfsd-htt 25320 michal 12u IPv4 42568 0t0 TCP michaltest.local:56203->lb260.amst.cotendo.net:http (CLOSE_WAIT) netstat says: michal@michaltest:/var/log/apache2$ sudo netstat -lnp | grep '80' unix 2 [ ACC ] STREAM LISTENING 8030 876/acpid /var/run/acpid.socket /var/log/apache2/error.log: [Thu Nov 08 11:13:30 2012] [notice] Apache/2.2.22 (Ubuntu) configured -- resuming normal operations [Thu Nov 08 11:17:32 2012] [notice] caught SIGTERM, shutting down /etc/apache2/ports.conf: NameVirtualHost *:80 Listen 80 <IfModule mod_ssl.c> Listen 443 </IfModule> <IfModule mod_gnutls.c> Listen 443 </IfModule> Thanks for your help. EDIT #1: michal@michaltest:~$ sudo netstat -ano | grep '443' tcp 54 0 10.0.2.15:58504 91.189.92.70:443 CLOSE_WAIT off (0.00/0/0)

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• What's The Difference Between Imperative, Procedural and Structured Programming?

  - by daniels

  By researching around (books, Wikipedia, similar questions on SE, etc) I came to understand that Imperative programming is one of the major programming paradigms, where you describe a series of commands (or statements) for the computer to execute (so you pretty much order it to take specific actions, hence the name "imperative"). So far so good. Procedural programming, on the other hand, is a specific type (or subset) of Imperative programming, where you use procedures (i.e., functions) to describe the commands the computer should perform. First question: Is there an Imperative programming language which is not procedural? In other words, can you have Imperative programming without procedures? Update: This first question seems to be answered. A language CAN be imperative without being procedural or structured. An example is pure Assembly language. Then you also have Structured programming, which seems to be another type (or subset) of Imperative programming, which emerged to remove the reliance on the GOTO statement. Second question: What is the difference between procedural and structured programming? Can you have one without the other, and vice-versa? Can we say procedural programming is a subset of structured programming, as in the image?

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• Platform Builder: PBWorkspaces CESysgen.bat Not Used?

  - by Bruce Eitman

  One of the things that I like about Windows CE is that I am always learning new things, but in this case it is a bit disturbing. We working with Multi UI (MUI) this week and discovered some problems with Windows CE 5.0 and Chinese language support. These problems don’t exist in CE 6.0. The problem was that in the batch files in Public\CEBASE\oak\misc, specifically weceshellfe.bat, some of the shell components needed are only included if certain LOCALs are selected. English is not one of them, I suppose this is because someone didn’t think that we would ever use them and English – doh. No problem, just work around this in PBWorkspaces\<workspace>\WINCE500\<BPS>\cesysgen.bat. But that didn’t work. After a lot of trial and error, what I determined is that this cesysgen.bat isn’t actually used by Platform Builder any more.  Instead, in that same folder is a <workspace>.bat file that is called by Public\CEBASE\oak\misc\cesysgen.bat. That leads to some new problems though, but solvable, in that what I really wanted to do was add a fix after the batch files in CEBASE run, but <workspace>.bat runs before the other batch files in CEBASE. So what I finally came up with was to add the fix to the PASS2 handling in <workspace>.bat. Copyright © 2010 – Bruce Eitman All Rights Reserved

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• Choice of open source license for some components, closed source for others

  - by Peter Serwylo

  G'day, I am working on a set of multiplayer games, where different games play against each other (e.g. you play a Tetris clone, I play an Asteroids clone, but we are both competing against each other). All the games would be based on the same underlying framework written specifically for this project. I am struggling to comprehend how I would license this so that: The underlying framework is open source, so other people can create new games based on it. Some games built on the framework are open source Other games are closed source The goal is to have two bundles on something like the Android market: One free and open source package which has a collection of games Another "premium" (although I dislike that word) paid package which has a different collection of games. Usually I am fond of permissive licenses such as MIT/BSD, however I would prefer something more in the vein of the GPL for this. This is because for software such as the snes-9x SNES emulator, which is a great piece of software, there is a ton of poor quality versions being sold, whereas it would be preferable if there was just one authoritative version which was always kept up to date, and distributed for free. If the underlying framework was GPL'd, would I be able to build closed source games on top of it? Thanks for your input.

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• Remapping keyboard to get extra cursor keys - but why stick to VIM standard hjkl

  - by Carlo V. Dango

  Inspired from VIM I recently remapped my keyboard layout to get extra keys for cursor movement. Being fluent in both QWERTY and DVORAK, it came quite natural to me to remap the DF and JK keys rather than the VIM standard hjkl keys. Here is my reasoning It enables me to quickly identify cursor keys since F and J are physically marked on my keyboard I'm using two hands for movement rather than one. I guess from DVORAK I learned to appreciate shifting between hands rather than using primarily one hand. It maps well with the Kinesis keyboard mapping http://www.kinesis-ergo.com/advantage.htm that I use occasionally. I feel I'm using my strongest fingers. I don't have to stretch my right index finger to read H as I would using the VIM layout. However, since I am still doing green field explorations on the cursor key remapping, I'd like others to share their experiences and/or criticize my suggested mapping. PS. If you want to toy around with my remapping using Autohotkey here is my script ; extra cursor keys. !d:: Send {Left} <^>!d:: Send {Left} !f:: Send {Right} <^>!f:: Send {Right} !j:: Send {Up} <^>!j:: Send {Up} !k:: Send {Down} <^>!k:: Send {Down} The question Is this mapping sane or is the VIM mapping superior?

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• MSCC: Purpose and benefits of Version Control Systems (VCS)

  Unfortunately, there was no monthly meetup during May. Which means that it was even more important and interesting to go forward with a great topic for this month. Earlier this year I already spoke to Nayar Joolfoo about doing a presentation on version control systems (VCS), and he gladly agreed since then. It was just about finding the right date for the action. Furthermore, it was also a great coincidence that Avinash Meetoo announced on social media networks that Knowledge 7 is about to have a new training on "Effective git" - which correlates to a book title Avinash is currently working on - all the best with your approach on this and reach out to our MSCC craftsmen for recessions. Once again a big Thank you to Orange Ebene Accelerator on providing the venue for us, and the MSCC members involved on securing the time slot for our event. Unfortunately, it's kind of tough to get an early confirmation for our meetups these days. I'll keep you posted on that one as there are some interesting and exciting options coming up soon. Okay, let's talk about the meeting and version control systems again. As usual, I'm going to put my first impression of the meetup: "Absolutely great topic, questions and discussions on version control systems, like git or VSO. I was also highly pleased by the number of first timers and female IT geeks. Hopefully, we will be able to keep this trend for future get-togethers." And I really have to emphasise the amount of fresh blood coming to our gathering. Also, during the initial phase it was surprising to see that exactly those first-timers, most of them students at various campuses here on the island, had absolutely no idea about version control systems. More about further down... Reactions of other attendees If I counted correctly, we had a total of 17 attendees this month, and I'd like to give you feedback from some of them: "Inspiring. Helped me understand more about GIT." -- Sean on event comments "Joined the meetup today with literally no idea what is a version control system. I have several reasons why I should be starting to use VCS as from NOW in my projects. Thanks Nayar, Jochen and other participants :)" -- Yudish on event comments "Was present today and I'm very satisfied.I was not aware if there was a such tool like git available. Thanks to those who contributed for this meetup.It was great. Learned a lot from this meetup!!" -- Leonardo on event comments "Seriously, I can see how it’s going to ease my task and help me save time. Gone are the issues with files backups.  And since I’ll be doing my dissertation this year, using Git would help me a lot for my backups and I’m grateful to Nayar for the great explanation." -- Swan-Iyah on MSCC meetup : Version Controls Hopefully, I'll be able to get some other sources - personal blogs preferred - on our meeting. Geeks, thank you so much for those encouraging comments. It's really great to experience that we, all members of the MSCC, are doing the right thing to get more IT information out, and to help each other to improve and evolve in our professional careers. Our agenda of the day Honestly, we had a bumpy start... First, I was battling a little bit with the movable room divider in order to maximize the space. I mean, we had 24 RSVPs and usually there might additional people coming along. Then, for what ever reason, we were facing power outages - actually twice in short periods. Not too good for the projector after all, but hey it went smooth for the rest of the time being. And last but not least... our first speaker Nayar got stuck somewhere on the road. ;-) Anyway, not a real show-stopper and we used the time until Nayar's arrival to introduce ourselves a little bit. It is always important for me to get to know the "newbies" a little bit, and as a result we had lots of students of university - first year, second year and recent graduates - among them. Surprisingly, none of them was ever in contact with version control systems at all. I mean, this is a shocking discovery! Similar to the ability of touch-typing I'd say that being able to use (and master) any kind of version control system is compulsory in any job in the IT industry. Seriously, I'm wondering what is being taught during the classes on the campus. All of them have to work on semester assessments or final projects, even in small teams of 2-4 people. That's the perfect occasion to get started with VCS. Already in this phase, we had great input from more experienced VCS users, like Sean, Avinash and myself. git - a modern approach to VCS - Nayar What a tour! Nayar gave us the full round of git from start to finish, even touching some more advanced techniques. First, he started to explain about the importance of version control systems as an essential tool for software developers, even working alone on a project, and the ability to have a kind of "time machine" that allows you to inspect and revert to a previous version of source code at any time. Then he showed how easy it is to install git on an Ubuntu based system but also mentioned that git is literally available for any operating system, like Windows, Mac OS X and of course other Linux distributions. Next, he showed us how to set the initial configuration values of user name and email address which simplifies the daily usage of the git client while working with your repositories. Then he initialised and added a new repository for some local development of a blogging software. All commands were done using the command line interface (CLI) so that they can be repeated on any system as reference. The syntax and the procedure is always the same, and Nayar clearly mentioned this to the attendees. Now, having a git repository in place it was about time to work on some "important" changes on the blogging software - just for the sake of demonstrating the ease of use and power of git. One interesting question came very early: "How many commands do we have to learn? It looks quite difficult at the moment" - Well, rest assured that during daily development circles you will need less than 10 git commands on a regular base: git add, commit, push, pull, checkout, and merge And Nayar demo'd all of them. Much to the delight of everyone he also showed gitk which is the git repository browser. It's an UI tool to display changes in a repository or a selected set of commits. This includes visualizing the commit graph, showing information related to each commit, and the files in the trees of each revision. Using gitk to display and browse information of a local git repository And last but not least, we took advantage of the internet connectivity and reached out to various online portals offering git hosting for free. Nayar showed us how to push the local repository into a remote system on github. Showing the web-based git browser and history handling, and then also explained and demo'd on how to connect to existing online repositories in order to get access to either your own source code or other people's open source projects. Next to github, we also spoke about bitbucket and gitlab as potential online platforms for your projects. Have a look at the conditions and details about their free service packages and what you can get additionally as a paying customer. Usually, you already get a lot of services for up to five users for free but there might be other important aspects that might have an impact on your decision. Anyways, moving git-based repositories between systems is a piece of cake, and changing online platforms is possible at any stage of your development. Visual Studio Online (VSO) - Jochen Well, Nayar literally covered all elements of working with git during his session, including the use of external online platforms. So, what would be the advantage of talking about Visual Studio Online (VSO)? First of all, VSO is "just another" online platform for hosting and managing git repositories on remote systems, equivalent to github, bitbucket, or any other web site. At the moment (of writing), Microsoft also provides a free package of up to five users / developers on a git repository but there is more in that package. Of course, it is related to software development on the Windows systems and the bonds are tightened towards the use of Visual Studio but out of experience you are absolutely not restricted to that. Connecting a Linux or Mac OS X machine with a git client or an integrated development environment (IDE) like Eclipse or Xcode works as smooth as expected. So, why should one opt in for VSO? Well, one of the main aspects that I would like to mention here is that VSO integrates the Application Life Cycle Methodology (ALM) of Microsoft in their platform. Meaning that you get agile project management with Backlogs, Sprints, Burn-down charts as well as the ability to track tasks, bug reports and work items next to collaborative team chats. It's the whole package of agile development you'll get. And, something I mentioned briefly during the begin of our meeting, VSO gives you the possibility of an automated continuous integrated (CI) process which builds and can run tests of your source code after each commit of changes. Having a proper CI strategy is also part of the Clean Code Developer practices - on Level Green actually -, and not only simplifies your life as a software developer but also reduces the sources of potential errors. Seamless integration and automated deployment between Microsoft Azure Web Sites and git repository But my favourite feature is the seamless continuous deployment to Microsoft Azure. Especially, while working on web projects it's absolutely astounishing that as soon as you commit your chances it just takes a couple of seconds until your modifications are deployed and available on your Azure-hosted web sites. Upcoming Events and networking Due to the adjusted times, everybody was kind of hungry and we didn't follow up on networking or upcoming events - very unfortunate to my opinion and this will have an impact on future planning of our meetups. Because I rather would like to see more conversations during and at the end of our meetings than everyone just packing their laptops, bags and accessories and rush off to grab some food. I was hoping to get some information regarding this year's Code Challenge - supposedly to be organised during July? Maybe someone could leave a comment on that - but I couldn't get any updates. Well, I'll keep digging... In case that you would like to get more into git and how to use it effectively, please check out Knowledge 7's upcoming course on "Effective git". Thanks Avinash for your vital input into today's conversation and I'm looking forward to get a grip on your book title very soon. My resume of the day Do not work in IT without any kind of version control system! Seriously, without a VCS in place you're doing it wrong. It's like driving a car without seat belts attached or riding your bike without safety helmet. You don't do that! End of discussion. ;-) Nowadays, having access to free (as in cost) tools to install on your machine and numerous online platforms to host your source code for free for up to five users it's a no-brainer to get yourself familiar with VCS. Today's sessions gave a good overview on how to start using git and how to connect to various remote services like github or VSO.

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• Introducing Oracle VM VirtualBox

  - by Fat Bloke

  I guess these things always take longer than expected and, while the dust is still not completely settled in all the ex-Sun geographies, it is high time we started looking at some of the great new assets in the Oracle VM portfolio. So let's start with one of the most exciting: Oracle VM VirtualBox. VirtualBox is cross-platform virtualization software, oftentimes called a hypervisor, and it runs on Windows, Linux, Solaris and the Mac. Which means that you download it, you install it on your existing platform, and start creating and running virtual machines alongside your existing applications. For example, on my Mac I can run Oracle Enterprise Linux and Windows 7 alongside my Mac apps like this...(Click to zoom)VirtualBox use has grown phenomenally to the point that at Sun it was the 3rd most popular download behind Java and MySQL. Its success can be attributed to the fact that it doesn't need dedicated hardware, it can be installed on either client or server classes of computers, is very easy to use and is free for personal use. And, as you might expect, VirtualBox has it's own vibrant community too, over at www.virtualbox.org There are hundreds of tutorials out there about how to use VirtualBox to create vm's and install different operating systems ranging from Windows 7 to ChromeOS, and if you don't want to install an operating system yourself, you can download pre-built virtual appliances from community sites such as VirtualBox Images or commercial companies selling subscriptions to whole application stacks, such as JumpBox . In no time you'll be creating and sharing your own vm's using the VirtualBox OVF export and import function. VirtualBox is deceptively powerful. Under the simple GUI lies a formidable engine capable of running heavyweight multi-CPU virtual workloads, exhibiting Enterprise capabilities including a built-in remote display server, an iSCSI initiator for connecting to shared storage, and the ability to teleport running vm's from one host to another. And for solution builders, you should be aware that VirtualBox has a scriptable command line interface and an SDK and rich web service APIs. To get a further feel for what VirtualBox is capable of, check out some of these short movies or simply go download it for yourself.- FB

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• Are today's general purpose languages at the right level of abstarction ?

  - by KeesDijk

  Today Uncle Bob Martin, a genuine hero, showed this video In this video Bob Martin claims that our programming languages are at the right level for our problems at this time. One of the reasons I get from this video as that he Bob Martin sees us detail managers and our problems are at the detail level. This is the first time I have to disagree with Bob Martin and was wondering what the people at programmers think about this. First there is a difference between MDA and MDE MDA in itself hasn't worked and I blame way to much formalisation at a level you can't formalize these kind of problems. MDE and MDD are still trying to prove themselves and in my mind show great promise. e.g. look at MetaEdit The detail still needs to be management in my mind, but you do so in one place (framework or generators) instead of at multiple places. Right for our kind of problems ? I think depends on what problems you look at. Do the current programming languages keep up with the current demands on time to market ? Are they good at bridging the business IT communication gap ? So what do you think ?

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• Windows Azure Evolution &ndash; TFS Integration (WAWS Part 2)

  - by Shaun

  So this is the fourth blog post about the new features of Windows Azure and the second part of Windows Azure Web Sites. But this is not just focus on the WAWS since the function I’m going to introduce is available in both Windows Azure Web Sites and Windows Azure Cloud Service (a.k.a. hosted service). In the previous post I talked about the Windows Azure Web Sites and how to use its gallery to build a WordPress personal blog without coding. Besides the gallery we can create an empty web site and upload our website from vary approaches. And one of the highlighted feature here is that, we can make our web site integrated with a source control service, such as TFS and Git, so that it will be deployed automatically once a new commit or build available.   Create New Empty Web Site In the developer portal when creating a new web site, we can select QUICK CREATE item. This will create an empty web site with only one shared instance without any database associated. Let’s specify the URL, region and subscription and click OK. After a few seconds our website will be ready. And now we can click the BROWSE button to open this empty website. As you can see there is a welcome page available in my website even thought I didn’t upload or deploy anything. This means even though the website will be charged even before anything was deployed, similar as the cloud service (hosted service). It is because once we created a website, Windows Azure platform had arranged a hosting process (w3wp.exe) in the group of virtual machines.   Create Project in TFS Preview Service and Setup Link Currently the Windows Azure Web Sites can integrate with TFS and Git as its deployment source, and it only support the Microsoft TFS Preview Service for now. I will not deep into how to use the TFS preview service in this post but once we click into the website we had just created and then clicked the “Set up TFS publishing”, there will be a dialog helping us to connect to this service. If you don’t have an account you can click the link shown below to request one. Assuming we have already had an account of TFS service then we need to create a new project firstly. Go to your TFS service website and create a new project, giving the project name, description and the process template. Then, back to the developer portal and clicked the “Set up TFS publishing” link. In the popping up window I will provide my TFS service URL and click the “Authorize now” link. Click “Accept” button to allow my windows azure to connect to my TFS service. Then it will be back to the developer portal and list all projects in my account. Just select the one I had just created and click OK. Then our website is linking to the TFS project I specified and finally it will show similar like this below. This means the web site had been linked to the TFS successfully.   Work with TFS Preview Service in VS2010 In the figure above there are some links to guide us how to connect to the TFS server through Visual Studio 2010 and 2012 RC. If you are using Visual Studio 2012 RC, you don’t need any extension. But if you are using Visual Studio 2010 you must have SP1 and KB2581206 installed. To connect to my TFS service just open the Visual Studio and in the Team Explorer, we can add a new TFS server and paste the URL of my TFS service from the developer portal. And select the project I had just created, then it will be listed in my Team Explorer. Now let’s start to build our website. Since the website we are going to build will be deployed to WAWS, it’s NOT a cloud service, NOT a web role. So in this case we need to create a normal ASP.NET web application. For example, an ASP.NET MVC 3 web application. Next, right click on the solution and select “Add Solution to Source Control”, select the project I had just created. Then check my code in. Once the check-in finished we can see that there is a build running in the TFS server. And if we back to the developer portal, we will see in our web site deployment page there’s a deployment running. In fact, once we linked our web site to our TFS then it will create a new build definition in our TFS project. It will be triggered by each check-in and deploy to the web site we linked automatically. So that when our code had been compiled it will be published to our web site from our TFS server. Once the build and deployment finished we can see it’s now active on our developer portal. Now we can see the web site that created from my Visual Studio and deployed by my TFS.   Continue Deployment through VS and TFS A big benefit when using TFS publishing is the continue deployment. Now if I changed some code in my Visual Studio, for example update some text on the home page and check in my changes, then it will trigger an new build and deploy to my WAWS automatically. And even more, if we wanted to rollback to a previous version we can just select an existing deployment listed in the portal and click REDEPLOY at the bottom.   Q&A: Can Web Site use Storage work with a Worker Role? Stacy asked a question in my previous post, which was “can a web site use Windows Azure Storage and furthermore working with a worker role”. Since the web site is deployed on the windows azure virtual machines in data center, it must be able to use all windows azure features such as the storage, SQL databases, CDN, etc.. But since when using web site we normally have a standard ASP.NET web application, PHP website or NodeJS, the windows azure SDK was not referenced by default. But we can add them by ourselves. In our sample project let’s right click on my MVC project and clicked the “Manage NuGet packages”. And in the dialog I will search windows azure packages and select the “Windows Azure Storage” to install. Then we will have the assemblies to access windows azure storage such as tables, queues and blobs. Since I have a storage account already, let’s have a quick demo, just to list all blobs in a container. The code would be like this. 1: using System; 2: using System.Collections.Generic; 3: using System.Linq; 4: using System.Web; 5: using System.Web.Mvc; 6: using Microsoft.WindowsAzure; 7: using Microsoft.WindowsAzure.StorageClient; 8:  9: namespace WAASTFSDemo.Controllers 10: { 11: public class HomeController : Controller 12: { 13: public ActionResult Index() 14: { 15: ViewBag.Message = "Welcome to Windows Azure!"; 16:  17: var credentials = new StorageCredentialsAccountAndKey("[STORAGE_ACCOUNT]", "[STORAGE_KEY]"); 18: var account = new CloudStorageAccount(credentials, false); 19: var client = account.CreateCloudBlobClient(); 20: var container = client.GetContainerReference("shared"); 21: ViewBag.Blobs = container.ListBlobs().Select(b => b.Uri.AbsoluteUri); 22:  23: return View(); 24: } 25:  26: public ActionResult About() 27: { 28: return View(); 29: } 30: } 31: } 1: @{ 2: ViewBag.Title = "Home Page"; 3: } 4:  5: <h2>@ViewBag.Message</h2> 6: <p> 7: To learn more about ASP.NET MVC visit <a href="http://asp.net/mvc" title="ASP.NET MVC Website">http://asp.net/mvc</a>. 8: </p> 9: <div> 10: <ul> 11: @foreach (var blob in ViewBag.Blobs) 12: { 13: <li>@blob</li> 14: } 15: </ul> 16: </div> And then just check in the code, it will be deployed to my web site. Finally we can see the blobs in my storage.   This is just an example but it proves that web sites can connect to storage, table, blob and queue as well. So the answer to Stacy should be “yes”. The web site can use queue storage to work with worker role.   Summary In this post I demonstrated how to integrate with TFS from Windows Azure Web Sites. You can see our website can be built, uploaded and deployed automatically by TFS service. All we need to do is to provide the TFS name and select the project. Not only the Windows Azure Web Site, in this upgrade the Windows Azure Cloud Services (hosted service) can be published through TFS as well. Very similar as what we have shown below. But currently, only Microsoft TFS Service Preview can be integrated with Windows Azure. But I think in the future we can link the TFS in our enterprise and some 3rd party TFS such as CodePlex to Windows Azure.   Hope this helps, Shaun All documents and related graphics, codes are provided "AS IS" without warranty of any kind. Copyright © Shaun Ziyan Xu. This work is licensed under the Creative Commons License.

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• Mission 26 Captures Endeavour’s Last Trip in Stop Motion

  - by Jason Fitzpatrick

  On September 21, 2012 the Space Shuttle Endeavour was delivered to the Los Angeles International Airport and spent the next three days being slowly transported 12 miles to the California Science Center. One dedicated team of photographers captured the whole thing. Lead by Matthew Givot, the group followed the shuttle for three straight days, photographing it around the clock. The Endeavor started on Thursday night and went on until Sunday night, with very little sleep to no sleep. The only thing that kept us going was pure love of the art and adrenaline. One thing that stood out the most for me, while I was shooting, was the people of Los Angeles. It was so powerful to see the excitement on peoples faces and the pride of their home town. No matter how many times I would see the Shuttle it would never get old. This has been an amazing experience that I will never forget. My hope is that this film will show you the amount of dedicated people and teamwork that it took to get the Endeavour to its new home. Enjoy. The end result of their labor is the above video, a beautiful time-lapse video of Endeavour’s journey from the airport to its hanger at the California Science Center. Can Dust Actually Damage My Computer? What To Do If You Get a Virus on Your Computer Why Enabling “Do Not Track” Doesn’t Stop You From Being Tracked

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• CRM@Oracle Series: Web Marketing Integration

  - by tony.berk

  Who is visiting your website? How did they get there? Was it from a search engine? Email campaign? Are they downloading whitepapers, datasheets, presentations, software? Are they interested in attending one of your marketing events? Are you capturing these leads or which marketing campaign generated the lead? There are a lot of questions related to traffic on a website, and the answers to those questions can be found in your CRM system. Visitors who download marketing collateral are potential leads, so it is important to capture who they are, how they got there, where they went on the website and what they are looking for. Today's CRM@Oracle slidecast discusses how Oracle uses Siebel CRM to plan and execute marketing campaigns on our website, www.oracle.com, and capture the key information about who is downloading content or interested in attending one of our marketing events. The responses are captured, qualified, and if appropriate, a lead is generated. It all happens in Siebel CRM. CRM@Oracle Series: Web Marketing Integration Click here to learn more about Oracle CRM products and here to learn about other customers using Oracle CRM. Are you enjoying the CRM@Oracle Series? If you have a particular CRM area or function which you'd like to hear how Oracle implemented it internally, leave us a comment and we'll try to get it on our list.

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• Silverlight Cream for May 30, 2010 -- #873

  - by Dave Campbell

  In this Issue: Matthias Shapiro, Colin Blair(-2-), Mike Snow, Marlon Grech, Victor Gaudioso. Shoutout: If you're going to be anywhere near Mission Viejo, California on June 19th, set your calendar for this Victor Gaudioso event: New Speaking Event: Microsoft Book Signing/Silverlight 4 Presentation SilverLaw has another example of his Flexible surface app up: Drag & Drop Flexible Surface - Silverlight 4 From SilverlightCream.com: Silverlight 4 Binding and StringFormat in XAML Matthias Shapiro has a discussion posted about StringFormat binding in Silverlight 4 ... he dug in hard on this... well worth a read. View Model Collection Properties for WCF RIA Services Colin Blair is discussing some possibilities for exposing collections of entities from the ViewModel... his favorite: PagedCollectionView. The next post discusses this deeper. Advanced Paged Collection View Colin Blair continues in more depth on the PagedCollectionView, this time handling paging, sorting, and multiple loads. Silverlight Tip of the day #25 – Detecting Validation Errors on Submit Mike Snow's latest Tip of the Day is up and is about validation - specifically validating after your user has pressed "OK" INotifyPropertyChanged… I am fed up of handling events just to know when a property changed Marlon Grech has an Rx-less solution to code notifications of properties changing... this is a WPF and Silverlight solution and all the code is downloadable. New Silverlight Video Tutorial: How to Add Multiple BitmapEffects to One Object Victor Gaudioso's latest outing is in response to a query from a reader and is a video tutorial showing how to add multiple bitmap effects to one object. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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• Special thanks to everyone that helped me in 2010.

  - by mbcrump

  2010 has been a very good year for me and I wanted to create a list and thank everyone for what they have done for me.  I also wanted to thank everyone for reading and subscribing to my blog. It is hard to believe that people actually want to read what I write. I feel like I owe a huge thanks to everyone listed below. Looking back upon 2010, I feel that I’ve grown as a developer and you are part of that reason. Sometimes we get caught up in day to day work and forget to give thanks to those that helped us along the way. The list below is mine, it includes people and companies. This list is obviously not going to include everyone that has helped, just those that have stood out in my mind. When I think back upon 2010, their names keep popping up in my head. So here goes, in no particular order.  People Dave Campbell – For everything he has done for the Silverlight Community with his Silverlight Cream blog. I can’t think of a better person to get recognition at the Silverlight FireStarter event. I also wanted to thank him for spending several hours of his time helping me track down a bug in my feedburner account. Victor Gaudioso – For his large collection of video tutorials on his blog and the passion and enthusiasm he has for Silverlight. We have talked on the phone and I’ve never met anyone so fired up for Silverlight. Kunal Chowdhury – Kunal has always been available for me to bounce ideas off of. Kunal has also answered a lot of questions that stumped me. His blog and CodeProject article have green a great help to me and the Silverlight Community. Glen Gordon – I was looking frantically for a Windows Phone 7 several months before release and Glen found one for me. This allowed me to start a blog series on the Windows Phone 7 hardware and developing an application from start to finish that Scott Guthrie retweeted.  Jeff Blankenburg – For listening to my complaints in the early stages of Windows Phone 7. Jeff was always very polite and gave me his cell phone number to talk it over. He also walked me through several problems that I was having early on. Pete Brown – For writing Silverlight 4 in Action. This book is definitely a labor of love. I followed Pete on Twitter as he was writing it and he spent a lot of late nights and weekends working on it. I felt a lot smarter after reading it the first time. The second time was even better. John Papa – For all of his work on the Silverlight Firestarter and the Silverlight community in general. He has also helped me on a personal level with several things. Daniel Heisler – For putting up with me the past year while we worked on many .NET projects together in 2010. Alvin Ashcraft – For publishing a daily blog post on the best of .NET links. He has linked to my site many times and I really appreciate what he does for the community. Chris Alcock – For publishing the Morning Brew every weekday. I remember when I first appeared on his site, I started getting hundreds of hits on my site and wondered if I was getting a DOS attack or something. It was great to find out that Chris had linked to one of my articles. Joel Cochran – For spending a week teaching “Blend-O-Rama”. This was my one of my favorite sessions of this year. I learned a lot about Expression Blend from it and the best part was that it was free and during lunchtime. Jeremy Likness – Jeremy is smart – very smart. I have learned a lot from Jeremy over the past year. He is also involved in the Silverlight community in every way possible, from forums to blog post to screencast to open source. It goes on and on. The people that I met at VSLive Orlando 2010. I had a great time chatting with Walt Ritscher, Wallace McClure, Tim Huckabee and David Platt. Also a special thanks to all of my friends on Twitter like @wilhil, @DBVaughan, @DataArtist, @wbm, @DirkStrauss and @rsringeri and many many more. Software Companies / Events / May of gave me FREE stuff. =) Microsoft (3) – I was sent a free coupon code by Microsoft to take the Silverlight 4 Beta Exam. I jumped on the offer and took the exam. It was great being selected to try out the exam before it goes public even though Microsoft eventually published a universal coupon code for everyone. I am still waiting to find out if I passed the exam. My fingers are crossed. Microsoft reaching out to me with some questions regarding the .NET Community. I’ve never had a company contact me with such interest in the community. Having a contest where 75 people could win a $100 gift certificate and a T-Shirt for submitting a Windows Phone 7 app. I submitted my app and won. All of the free launch events this year (Windows Phone 7, Visual Studio 2010, ASP.NET MVC). Wintellect – For providing an awesome day of free technical training called T.E.N. Where else can you get free training from some of the best programmers in the world? I also won a contest from them that included a NETAdvantage Ultimate License from Infragistics. VSLive – I attended the Orlando 2010 Conference and it was the best developer’s conference that I have ever attended. I got to know a lot of people at this conference and hang out with many wonderful speakers. I live tweeted the event and while it may have annoyed some, the organizers of VSLive loved it. I won the contest on Twitter and they invited me back to the 2011 session of my choice. This is a very nice gift and I really appreciate the generosity. BarcodeLib.com – For providing free barcode generating tools for a Non-Profit ASP.NET project that I was working on. Their third party controls really made this a breeze compared to my existing solution. NDepend – It is absolutely the best tool to improve code quality. The product is extremely large and I would recommend heading over to their site to check it out. Silverlight Spy – I was writing a blog post on Silverlight Spy and Koen Zwikstra provided a FREE license to me. If you ever wanted to peek inside of a Silverlight Application then this is the tool for you. He is also working on a version that will support OOB and Windows Phone 7. I would recommend checking out his site. Birmingham .NET Users Group / Silverlight Nights User Group – It takes a lot of time to put together a user group meeting every month yet it always seems to happen. I don’t want to name names for fear of leaving someone out but both of these User Groups are excellent if you live in the Birmingham, Alabama area. Publishing Companies Manning Publishing – For giving me early access to Silverlight 4 in Action by Pete Brown. It was really nice to be able to read this awesome book while Pete was writing it. I was also one of the first people to publish a review of the book. Sams Publishing and DZone – For providing a copy of Silverlight 4 Unleashed by Laurent Bugnion for me to review for their site. The review is coming in January 2011. Special Shoutout to the following 3rd Party Silverlight Controls It has been a great pleasure to work with the following companies on 3rd Party Control Giveaways every month. It always amazes me how every 3rd Party Control company is so eager to help out the community. I’ve never been turned down by any of these companies! These giveaways have sparked a lot of interest in Silverlight and hopefully I can continue giving away a new set every month. If you are a 3rd Party Control company and are interested in participating in these giveaways then please email me at mbcrump29[at]gmail[d0t].com. The companies below have already participated in my giveaways: Infragistics (December 2010) - Win a set of Infragistics Silverlight Controls with Data Visualization!  Mindscape (November 2010) - Mindscape Silverlight Controls + Free Mega Pack Contest Telerik (October 2010) - Win Telerik RadControls for Silverlight! ($799 Value) Again, I just wanted to say Thanks to everyone for helping me grow as a developer.  Subscribe to my feed

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• SQLAuthority News – 2 Whitepapers Announced – AlwaysOn Architecture Guide: Building a High Availability and Disaster Recovery Solution

  - by pinaldave

  Understanding AlwaysOn Architecture is extremely important when building a solution with failover clusters and availability groups. Microsoft has just released two very important white papers related to this subject. Both the white papers are written by top experts in industry and have been reviewed by excellent panel of experts. Every time I talk with various organizations who are adopting the SQL Server 2012 they are always excited with the concept of the new feature AlwaysOn. One of the requests I often here is the related to detailed documentations which can help enterprises to build a robust high availability and disaster recovery solution. I believe following two white paper now satisfies the request. AlwaysOn Architecture Guide: Building a High Availability and Disaster Recovery Solution by Using AlwaysOn Availability Groups SQL Server 2012 AlwaysOn Availability Groups provides a unified high availability and disaster recovery (HADR) solution. This paper details the key topology requirements of this specific design pattern on important concepts like quorum configuration considerations, steps required to build the environment, and a workflow that shows how to handle a disaster recovery. AlwaysOn Architecture Guide: Building a High Availability and Disaster Recovery Solution by Using Failover Cluster Instances and Availability Groups SQL Server 2012 AlwaysOn Failover Cluster Instances (FCI) and AlwaysOn Availability Groups provide a comprehensive high availability and disaster recovery solution. This paper details the key topology requirements of this specific design pattern on important concepts like asymmetric storage considerations, quorum model selection, quorum votes, steps required to build the environment, and a workflow. If you are not going to implement AlwaysOn feature, this two Whitepapers are still a great reference material to review as it will give you complete idea regarding what it takes to implement AlwaysOn architecture and what kind of efforts needed. One should at least bookmark above two white papers for future reference. Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Documentation, SQL Download, SQL Query, SQL Server, SQL Tips and Tricks, SQL White Papers, T SQL, Technology Tagged: AlwaysOn

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• SQL SERVER – Reducing Page Contention on TempDB

  - by pinaldave

  I have recently received following email. “We are using TraceFlag 1118 to reduce the tempDB contention on our servers (2000 and 2005). What is your opinion? We have read lots of material, would you please answer me in single line.” Wow, this was very interesting question. What intrigued me was the second last where I am asked to answer in a single line. There is something about this strong email, I feel like blogging it here. I think I can talk over this subject forever – well, there is no clear answer. There are so many caveats about everything.  Again, I must stay honest to the request about answering in single line. I also do not like to answer which is YES/NO. What should I do? Let me ask this question to community today? What will you answer to this email? Let me start this by answering it myself in one line and taking one side. “I enable this trace flag in SQL Server 2000 without hot patch or service pack and not in later versions (2005+) onwards as code is improved”. What do you do in this case? The best answer will feature in this blog with due credit. Regarding further read and hint here is Microsoft KB which I think is very helpful. In quick summary: (Read KB for accuracy) When any page is allocated first 8 pages are allocated in mixed extended. This trace flag allocates uniform extended at the time, reducing contention. You can enable this trace flag at startup. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: Pinal Dave, PostADay, SQL, SQL Authority, SQL Query, SQL Scripts, SQL Server, SQL Tips and Tricks, T SQL, Technology Tagged: SQL TempDB, TempDB

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• Why’s (Poignant) Guide to Ruby

  - by Ben Griswold

  You’re familiar with O’Reilly’s brilliant Head First Series, right?  Great.  Then you know how every book begins with an explanation of the Head First teaching style and you know the teaching format which Kathy Sierra and Bert Bates developed is based on research in cognitive science, neurobiology and educational psychology and it’s all about making learning visual and conversational and attractive and emotional and it’s highly effective.  Anyway, it’s a great series and you should read every last one of the books. Moving on… I’ve been wanting to learn more about Ruby and Why’s (Poignant) Guide to Ruby has been on my reading list for a while and there was talk about cartoon foxes and other silliness and I figured Why’s (Poignant) Guide to Ruby probably takes the same unorthodox teaching style as the Head First books – and that’s great – so I read the book, in piecemeal, over the last couple of weeks and, well, I figured wrong. Now having read the book, here’s my take on Why’s (Poignant) Guide – it’s very creative and clever and it does a darn good job of introducing one to Ruby.  If you’re interested in Ruby or simply interested, the online book is worth your time.  If you’re thinking (like me) that cartoon foxes will be doing the teaching, that’s simple not the case.  However, the cartoons and the random stories in the sidebar may serve a purpose. Unlike the Head First books where images and captions are used to further explain the teachings, the cartoons and stories in Why’s Guide serve as intermission and offer your brain a brief moment of rest before the next Ruby concept is explained.  It’s not a bad strategy, but definitely not as effective as the Head First techniques.  

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• Different Means Better with the new Windows Phone Developer Experience

  - by Nikita Polyakov

  If you are interested in the building mobile applications or have been in the past you might want to check out this blog post: Charlie Kindel - Different Means Better with the new Windows Phone Developer Experience What does this mean? Let me take some out takes and highlight them for you. It won’t come as a surprise to many to learn that the Windows Phone 7 developer experience builds upon the following GIANTS (among others): .NET Silverlight XNA platform Microsoft’s developer tools Web 2.0 standards and To enable the fantastic user experiences you’ve seen in the Windows Phone 7 Series demos so far we’ve had to break from the past. To deliver what developers expect in the developer platform we’ve had to change how phone apps were written. One result of this is previous Windows mobile applications will not run on Windows Phone 7 Series. To be clear, we will continue to work with our partners to deliver new devices based on Windows Mobile 6.5 and will support those products for many years to come, so it’s not as though one line ends as soon as the other begins. Once again, more details at MIX10. Start watching the @WP7Dev twitter account for more info.

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• Common mistakes which lead to corrupted invariants

  - by Dave B.

  My main source of income is web development and through this I have come to enjoy the wonders of programming as my knowledge of different languages has increased over the years through work and personal play. At some point I reached a decision that my college education was not enough and that I wanted to go back to school to get a university degree in either computer science or software engineering. I have tried a number of things in my life and it took me a while before I found something that I feel is a passion and this is it. There is one aspect of this area of study that I find throws me off though. I find the formal methods of proving program correctness a challenge. It is not that I have trouble writing code correctly, I can look at an algorithm and see how it is correct or flawed but I struggle sometimes to translate this into formal definitions. I have gotten perfect or near perfect marks on every programming assignment I have done at the college level but I recently got a swath of textbooks from a guy from univeristy of waterloo and found that I have had trouble when it comes to a few of the formalisms. Well at this point its really just one thing specifically, It would really help me if some of you could provide to me some good examples of common mistakes which lead to corrupted invariants, especially in loops. I have a few software engineering and computer science textbooks but they only show how things should be. I would like to know how things go wrong so that it is easier to recognize when it happens. Its almost embarrassing to broach this subject because formalisms are really basic foundations upon which matters of substance are built. I want to overcome this now so that it does not hinder me later.

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• Can&rsquo;t eject external USB or Firewire drive in Windows 7

  - by Kelly Jones

  As a SharePoint developer, I work a lot with Virtual Machines (presently using Windows Virtual PC, with Windows 7).  I’m using these VMs with my laptop, and in order to get better performance, I’ve moved them to external hard drives.  (These drives have faster RPMs, larger caches, and a larger capacity, than the internal drive.)  I have one large external drive at home, another similar drive at the office, and a small, slow portable drive that I carry with me. So, at the end of each day at the office, I copy the files from the external drive to my portable drive and then once I get home, I copy them from the portable to the larger external drive I leave at home.  I do this for a couple of reasons: so I can work at home and secondly, so I have backup copies.  (Often, I feel like I’m in the movie “Office Space” when copying the files before I leave the office). Anyway, after the files are copied, I safely eject the external drives, and then hibernate my laptop.  I’ve been doing this for over a year now, but within the last couple of months I started to have issues disconnecting the drives.  Intermittently, some application/process would have a lock on some file on the drive that would keep Windows from safely ejecting it. After looking into it, I found that it was actually the Windows search service that was accessing the drive! Since I wasn’t using Windows search to look for stuff on these drives, I removed them as locations to index. To do this in Windows 7, you need to go to Indexing Options (just type “Indexing” into the search box in the Start menu…).  One of the choices displayed will then be Indexing Options, so click on it and you should then see a window similar to this:   Click on the Modify button and you’ll see this window: Notice the different drives listed above.  My “FreeAgent XTreme (F:)” drive was checked for some reason, which was causing the indexing service to scan the drive looking for new files to make available in the search results.  Ever since I unchecked this box, I’ve been able to safely eject the drive.

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