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  • sed problem with scripting

    - by Pablo Ramos
    I am trying to run a script using sed i runing like this for et in 1 # 2 3 do if [ -d ET$et ]; then rm -rf ET$et; fi mkdir ET$et cd ET$et cp $home/step_$i/FDE/diabatA/run.adf . cp $home/step_$i/FDE/diabatA/mas$i.xyz . awk1=`awk '/type=fde/{print NR }' run.adf | head -1` awk2=`$(echo "$a+379" | bc -l )` sed -n "$awk1,"$awk2"p" run.adf > first awk3=`awk '/ATOMS/{print NR +1}' first` awk4=`cat mas$i.xyz | wc -l` awk4=$( echo "$awk4-1" | bc -l ) awk5=`awk "/ATOMS/{print NR +"${awk4}" }" run.adf` sed -n "$awk3,"$awk4"p" first > atoms par=$( echo "$awk4-99" | bc -l ) rho1=$(cat atoms | head -34 ) rho2=$(cat atoms | head -64 | tail -31) rho3=$(cat atoms | head -97 | tail -33) rhoall=$(cat atoms | tail -${par} ) echo -e "$rho1\n$rho2\n$rhoall" > eje done but is telling me this: (standard_in) 1: syntax error sed: -e expression #1, char 6: unexpected `,' sed: -e expression #1, char 1: unknown command: `,' Please, I appreciate any help with this issue... Thanks Pablo

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  • A better way to do concurrent programming

    - by Alex.Davies
    Programming to take advantage of multicore processors is hard. If you let multiple threads access the same memory, bad things happen. To avoid this, you use the lock keyword, but if you use that in the wrong way, your code deadlocks. It's all a nightmare. Luckily, there's a better way - Actors. They're really easy to think about. They're really safe (if you follow a couple of simple rules). And high-performance, type-safe actors are now available for .NET by using this open-source library: http://code.google.com/p/n-act/ Have a look at the site for details. I'll blog with more reasons to use actors and tips and tricks to get the best parallelism from them soon.

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  • Bash does not remember programs with non 0 exit status in history

    - by Amigable Clark Kant
    I enter a command. It fails. I press arrow up, modify something and enter it again ... hold it right there. It used to work like that. Now it's more like: I enter a command. It fails. I press arrow up, get the last command which didn't fail, likely "ls" or something useless and I type the whole thing again back by hand. What happened? It wasn't always like this. But it's quite some time since this behavior changed, I'll give you that. Some years ago, at least. How do I put some sanity back into my bash prompt?

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  • How should calculations be handled in a document database

    - by Morten
    Ok, so I have a program that basically logs errors into a nosql database. Right now there is just a single model for an error and its stored as a document in the nosql database. Basically I want to summarize across different errors and produce a summary of the "types" of errors that occured. Traditionally in a SQL database the this normalization would work with groupings, sums and averages but in a NoSQL database I assume I need to use mapreduce. My current model seems unfit for the task, how should I change the way I store "models" in order to make statistical analysis easy? Would a NoSQL database even be the right tool for this type of problem? I'm storing things in Google AppEngine's BigTable, so there are some limitations to think of as well.

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  • youtube-dl not performing as expected on 12.10

    - by J2big
    When I type the video url, it bring out this message instead of download. Please what do I do because I really need to start downloading videos. joshua@joshua-HP-625:~$ youtube-dl http://www.youtube.com/watch?v=h3gPo7qFOFw& feature=player_detailpage [1] 6720 joshua@joshua-HP-625:~$ Hi! We changed distribution method and now youtube-dl needs to update itself one more time. This will only happen once. Simply press enter to go on. Sorry for the trouble! The new location of the binaries is https://github.com/rg3/youtube-dl/downloads, not the git repository.

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  • Is WCF suitable for writing an application which is shared among applications?

    - by RPK
    I have developed and deployed few ASP.NET applications. Sometimes I want to stop the users from either inserting or updating a record when: Maintenance is going on. Stop operations due to payment delay. In one of my recent application I have implemented this feature to first check the database operations for locked status. If any of the above condition fulfils, database operations like insert and update are not carried out. I now need this feature in all the old applications and the future applications I build. I want to know whether WCF is suitable in this scenario as I want to share methods or an independent locking application among various other applications. Is WCF appropriate for this type of scenario?

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  • Backward compatibility with event-sourcing

    - by Tomas Jansson
    How do you stay backward compatible with event-sourcing? Let say you release a version that has one kind of event, let call it X. You know how to handle that event in all the systems that extracts the events from the event source. In a later release you make a change to event X or delete it, how do you stay backward compatible with that? To have a fully functional system you need to be able to handle the old event as the same time as you need to handle the updated version. Or if you delete that event type, then you will be stuck with code that is only there to handle legacy events which in my head can be a little bit messy in the long run.

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  • Oracle HRMS APIs

    - by PRajkumar
    Oracle HRMS APIs..... Here I will be sharing all the Oracle HRMS APIs related articles. Item Type Author 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Create Employee API Update Employee API Create Employee Contact API Create Employee Address API Update Employee Address API Create Element Entries for Employee API Delete Element Entries for Employee API Rehire Employee API Create Employee Payment Method API Create and Update Employee Phone API Create and Update Employee Salary Proposal API Update Employee Fed Tax Rule API Create Employee State Tax Rule API Update Employee State Tax Rule API Update Employee Assignment API Puneet Rajkumar Puneet Rajkumar Puneet Rajkumar Puneet Rajkumar Puneet Rajkumar Puneet Rajkumar Puneet Rajkumar Puneet Rajkumar Puneet Rajkumar Puneet Rajkumar Puneet Rajkumar Puneet Rajkumar Puneet Rajkumar Puneet Rajkumar Puneet Rajkumar

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  • Missed environment variables in Eclipse Juno

    - by hara
    I recently moved from Eclipse Indigo to Juno. I installed the IDE in my Ubuntu 12.04 by downloading the archive from here. Then I created an entry in the unity launcher for Juno as I done before for Indigo. Here is what I wrote in ~/.local/share/applications/eclipse-juno.desktop: [Desktop Entry] Type=Application Name=Eclipse Juno Comment=Eclipse Integrated Developmentm Environment Icon=~/.eclipse-juno/icon.xpm Exec=~/.eclipse-juno/eclipse -vmargs -Duser.name="my name" Terminal=false Categories=Development;IDE;Java; When I run eclipse from the unity launcher, eclipse does not see environment variables that I set in ~/.bascrc. Instead, if I run eclipse from shell, it can see all the env variables. How can I fix the problem? Thanks a lot.

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  • FAQ: Highlight GridView Row on Click and Retain Selected Row on Postback

    - by Vincent Maverick Durano
    A couple of months ago I’ve written a simple demo about “Highlighting GridView Row on MouseOver”. I’ve noticed many members in the forums (http://forums.asp.net) are asking how to highlight row in GridView and retain the selected row across postbacks. So I’ve decided to write this post to demonstrate how to implement it as reference to others who might need it. In this demo I going to use a combination of plain JavaScript and jQuery to do the client-side manipulation. I presumed that you already know how to bind the grid with data because I will not include the codes for populating the GridView here. For binding the gridview you can refer this post: Binding GridView with Data the ADO.Net way or this one: GridView Custom Paging with LINQ. To get started let’s implement the highlighting of GridView row on row click and retain the selected row on postback.  For simplicity I set up the page like this: <asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server"> <h2>You have selected Row: (<asp:Label ID="Label1" runat="server" />)</h2> <asp:HiddenField ID="hfCurrentRowIndex" runat="server"></asp:HiddenField> <asp:HiddenField ID="hfParentContainer" runat="server"></asp:HiddenField> <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Trigger Postback" /> <asp:GridView ID="grdCustomer" runat="server" AutoGenerateColumns="false" onrowdatabound="grdCustomer_RowDataBound"> <Columns> <asp:BoundField DataField="Company" HeaderText="Company" /> <asp:BoundField DataField="Name" HeaderText="Name" /> <asp:BoundField DataField="Title" HeaderText="Title" /> <asp:BoundField DataField="Address" HeaderText="Address" /> </Columns> </asp:GridView> </asp:Content>   Note: Since the action is done at the client-side, when we do a postback like (clicking on a button) the page will be re-created and you will lose the highlighted row. This is normal because the the server doesn't know anything about the client/browser not unless if you do something to notify the server that something has changed. To persist the settings we will use some HiddenFields control to store the data so that when it postback we can reference the value from there. Now here’s the JavaScript functions below: <asp:content id="Content1" runat="server" contentplaceholderid="HeadContent"> <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4/jquery.min.js" type="text/javascript"></script> <script type="text/javascript">       var prevRowIndex;       function ChangeRowColor(row, rowIndex) {           var parent = document.getElementById(row);           var currentRowIndex = parseInt(rowIndex) + 1;                 if (prevRowIndex == currentRowIndex) {               return;           }           else if (prevRowIndex != null) {               parent.rows[prevRowIndex].style.backgroundColor = "#FFFFFF";           }                 parent.rows[currentRowIndex].style.backgroundColor = "#FFFFD6";                 prevRowIndex = currentRowIndex;                 $('#<%= Label1.ClientID %>').text(currentRowIndex);                 $('#<%= hfParentContainer.ClientID %>').val(row);           $('#<%= hfCurrentRowIndex.ClientID %>').val(rowIndex);       }             $(function () {           RetainSelectedRow();       });             function RetainSelectedRow() {           var parent = $('#<%= hfParentContainer.ClientID %>').val();           var currentIndex = $('#<%= hfCurrentRowIndex.ClientID %>').val();           if (parent != null) {               ChangeRowColor(parent, currentIndex);           }       }          </script> </asp:content>   The ChangeRowColor() is the function that sets the background color of the selected row. It is also where we set the previous row and rowIndex values in HiddenFields.  The $(function(){}); is a short-hand for the jQuery document.ready event. This event will be fired once the page is posted back to the server that’s why we call the function RetainSelectedRow(). The RetainSelectedRow() function is where we referenced the current selected values stored from the HiddenFields and pass these values to the ChangeRowColor() function to retain the highlighted row. Finally, here’s the code behind part: protected void grdCustomer_RowDataBound(object sender, GridViewRowEventArgs e) { if (e.Row.RowType == DataControlRowType.DataRow) { e.Row.Attributes.Add("onclick", string.Format("ChangeRowColor('{0}','{1}');", e.Row.ClientID, e.Row.RowIndex)); } } The code above is responsible for attaching the javascript onclick event for each row and call the ChangeRowColor() function and passing the e.Row.ClientID and e.Row.RowIndex to the function. Here’s the sample output below:   That’s it! I hope someone find this post useful! Technorati Tags: jQuery,GridView,JavaScript,TipTricks

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  • Questions to ask interviewer in an Interview

    - by chota
    Hello All, I have an SDET interview upcoming week. I have been preparing since long. It is a good company. I am working as SDET since two year. I wonder what questions should i ask to my interviewer regarding testing and other thing. I would appreciate your help if you give me some sample questions that i should ask to my interviewer during the interview. Some of them i thoughts are a) What type of testing methodologies do you use? Do you have triage meeting everyday? What percentage of code coverage is done by unit tests? I do not find these questions to be more effective, i would appreciate if somebody could help me out in coming out with better question?

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  • Switch encoding of terminal with a command

    - by Tomas Lycken
    One of the servers I quite often ssh to uses western encoding instead of utf-8 (and there's no way I can change that). I've started writing a bash script to connect to this server, so I won't have to type out the entire address every time, but I would like to improve this script so it also changes the encoding of the terminal window correctly. The change I need to do can be performed using the mouse by navigating to "Terminal"-"Set Character Encoding..."-"Western (ISO-8859-1)". Is there a terminal command that does the same thing, for the current terminal window/screen? To clarify: I'm not interested in ways of switching the locale of the system on the remote site - that system is administered by someone else, and I have no idea what stuff might depend on the latin-1 encoding there. What I want to do is to let this terminal window on my side switch character encoding to the above mentioned, in the same way I can do with my mouse and the menus.

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  • Is it a good idea to create shared UI library that would render natively on different platforms?

    - by Maciej Donajski
    I am designing an application that has following flow: User designs a form using web application (J2EE backend application) The form is sent to mobile device (Android) Mobile device User fills out the form designed in 1. Results are synced with backend. One of my ideas is to create a common java UI library for creating the type of forms that I need. This library would also have a native renderers for different platforms (Web and Android would be implemented first). The whole point of it is to have a native experience on web and android side. Are there any existing solutions to meet the requirements that I have? Is it a good approach to achieve them?

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  • With respect to gnome-session, what is a "component"?

    - by Alistair Buxton
    Under /usr/share/gnome-session/sessions are files which describe the different types of sessions available from gnome-session. In these files is a list of required components, eg for shell: RequiredComponents=gnome-shell;gnome-settings-daemon; or for fallback: RequiredComponents=gnome-panel;gnome-settings-daemon; This appears to be a list of executables, but it is not. If I change gnome-panel to some other type of panel, the session does not start, and I see the following errors in ~/.xsession-errors: gnome-session[2003]: WARNING: Unable to find required component 'xfce4-panel' So my question: What is a component, how are they defined, and where does gnome-session look for them?

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  • Does this prove a network bandwidth bottleneck?

    - by Yuji Tomita
    I've incorrectly assumed that my internal AB testing means my server can handle 1k concurrency @3k hits per second. My theory at at the moment is that the network is the bottleneck. The server can't send enough data fast enough. External testing from blitz.io at 1k concurrency shows my hits/s capping off at 180, with pages taking longer and longer to respond as the server is only able to return 180 per second. I've served a blank file from nginx and benched it: it scales 1:1 with concurrency. Now to rule out IO / memcached bottlenecks (nginx normally pulls from memcached), I serve up a static version of the cached page from the filesystem. The results are very similar to my original test; I'm capped at around 180 RPS. Splitting the HTML page in half gives me double the RPS, so it's definitely limited by the size of the page. If I internally ApacheBench from the local server, I get consistent results of around 4k RPS on both the Full Page and the Half Page, at high transfer rates. Transfer rate: 62586.14 [Kbytes/sec] received If I AB from an external server, I get around 180RPS - same as the blitz.io results. How do I know it's not intentional throttling? If I benchmark from multiple external servers, all results become poor which leads me to believe the problem is in MY servers outbound traffic, not a download speed issue with my benchmarking servers / blitz.io. So I'm back to my conclusion that my server can't send data fast enough. Am I right? Are there other ways to interpret this data? Is the solution/optimization to set up multiple servers + load balancing that can each serve 180 hits per second? I'm quite new to server optimization, so I'd appreciate any confirmation interpreting this data. Outbound traffic Here's more information about the outbound bandwidth: The network graph shows a maximum output of 16 Mb/s: 16 megabits per second. Doesn't sound like much at all. Due to a suggestion about throttling, I looked into this and found that linode has a 50mbps cap (which I'm not even close to hitting, apparently). I had it raised to 100mbps. Since linode caps my traffic, and I'm not even hitting it, does this mean that my server should indeed be capable of outputting up to 100mbps but is limited by some other internal bottleneck? I just don't understand how networks at this large of a scale work; can they literally send data as fast as they can read from the HDD? Is the network pipe that big? In conclusion 1: Based on the above, I'm thinking I can definitely raise my 180RPS by adding an nginx load balancer on top of a multi nginx server setup at exactly 180RPS per server behind the LB. 2: If linode has a 50/100mbit limit that I'm not hitting at all, there must be something I can do to hit that limit with my single server setup. If I can read / transmit data fast enough locally, and linode even bothers to have a 50mbit/100mbit cap, there must be an internal bottleneck that's not allowing me to hit those caps that I'm not sure how to detect. Correct? I realize the question is huge and vague now, but I'm not sure how to condense it. Any input is appreciated on any conclusion I've made.

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  • Dictionary as DataMember in WCF after installing .NET 4.5 [migrated]

    - by Mauricio Ulate
    After installing .NET Framework 4.5 with Visual Studio 2012, whenever I want to obtain the reference from a WCF service, my dictionaries are changed into arrays. For example, Dictionary<int, double> is changed into ArrayOfKeyValueOfintdoubleKeyValueOfintdouble. This happens in both Visual Studio 2012 and 2010 (both Express). I've reviewed my configuration and the dictionary data type in the service reference configuration is System.Collection.Generic.Dictionary. Changing this doesn't make a difference. Reverting to just using Visual Studio 2010 and .NET 4.0 is not an option.

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  • Clean way to use mutable implementation of Immutable interfaces for encapsulation

    - by dsollen
    My code is working on some compost relationship which creates a tree structure, class A has many children of type B, which has many children of type C etc. The lowest level class, call it bar, also points to a connected bar class. This effectively makes nearly every object in my domain inter-connected. Immutable objects would be problematic due to the expense of rebuilding almost all of my domain to make a single change to one class. I chose to go with an interface approach. Every object has an Immutable interface which only publishes the getter methods. I have controller objects which constructs the domain objects and thus has reference to the full objects, thus capable of calling the setter methods; but only ever publishes the immutable interface. Any change requested will go through the controller. So something like this: public interface ImmutableFoo{ public Bar getBar(); public Location getLocation(); } public class Foo implements ImmutableFoo{ private Bar bar; private Location location; @Override public Bar getBar(){ return Bar; } public void setBar(Bar bar){ this.bar=bar; } @Override public Location getLocation(){ return Location; } } public class Controller{ Private Map<Location, Foo> fooMap; public ImmutableFoo addBar(Bar bar){ Foo foo=fooMap.get(bar.getLocation()); if(foo!=null) foo.addBar(bar); return foo; } } I felt the basic approach seems sensible, however, when I speak to others they always seem to have trouble envisioning what I'm describing, which leaves me concerned that I may have a larger design issue then I'm aware of. Is it problematic to have domain objects so tightly coupled, or to use the quasi-mutable approach to modifying them? Assuming that the design approach itself isn't inherently flawed the particular discussion which left me wondering about my approach had to do with the presence of business logic in the domain objects. Currently I have my setter methods in the mutable objects do error checking and all other logic required to verify and make a change to the object. It was suggested that this should be pulled out into a service class, which applies all the business logic, to simplify my domain objects. I understand the advantage in mocking/testing and general separation of logic into two classes. However, with a service method/object It seems I loose some of the advantage of polymorphism, I can't override a base class to add in new error checking or business logic. It seems, if my polymorphic classes were complicated enough, I would end up with a service method that has to check a dozen flags to decide what error checking and business logic applies. So, for example, if I wanted to have a childFoo which also had a size field which should be compared to bar before adding par my current approach would look something like this. public class Foo implements ImmutableFoo{ public void addBar(Bar bar){ if(!getLocation().equals(bar.getLocation()) throw new LocationException(); this.bar=bar; } } public interface ImmutableChildFoo extends ImmutableFoo{ public int getSize(); } public ChildFoo extends Foo implements ImmutableChildFoo{ private int size; @Override public int getSize(){ return size; } @Override public void addBar(Bar bar){ if(getSize()<bar.getSize()){ throw new LocationException(); super.addBar(bar); } My colleague was suggesting instead having a service object that looks something like this (over simplified, the 'service' object would likely be more complex). public interface ImmutableFoo{ ///original interface, presumably used in other methods public Location getLocation(); public boolean isChildFoo(); } public interface ImmutableSizedFoo implements ImmutableFoo{ public int getSize(); } public class Foo implements ImmutableSizedFoo{ public Bar bar; @Override public void addBar(Bar bar){ this.bar=bar; } @Override public int getSize(){ //default size if no size is known return 0; } @Override public boolean isChildFoo return false; } } public ChildFoo extends Foo{ private int size; @Override public int getSize(){ return size; } @Override public boolean isChildFoo(); return true; } } public class Controller{ Private Map<Location, Foo> fooMap; public ImmutableSizedFoo addBar(Bar bar){ Foo foo=fooMap.get(bar.getLocation()); service.addBarToFoo(foo, bar); returned foo; } public class Service{ public static void addBarToFoo(Foo foo, Bar bar){ if(foo==null) return; if(!foo.getLocation().equals(bar.getLocation())) throw new LocationException(); if(foo.isChildFoo() && foo.getSize()<bar.getSize()) throw new LocationException(); foo.setBar(bar); } } } Is the recommended approach of using services and inversion of control inherently superior, or superior in certain cases, to overriding methods directly? If so is there a good way to go with the service approach while not loosing the power of polymorphism to override some of the behavior?

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  • How do I rebuild a corrupt dpkg status file?

    - by Ramón
    Whenever I type sudo apt-get remove and then press the Tab key for auto-completion I get the following message: grep-status: /var/lib/dpkg/status:15945: expected a colon. I don't see anything especially strange at line 15945 in the status file. It's a dot character in the description field of a mono library package and inserting a colon did not help. Removing the line containing the dot did not work either. Overwriting the file with status-old resulted in the same message. Is there some way to rebuild the status file?

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  • Most underestimated programming tool

    - by Anto
    We have many great tools which helps a lot when programming, such as good programmers text editors, IDEs, debuggers, version control systems etc. Some of the tools are more or less "must have" tools for getting the job done (e.g. compilers). There are still always tools which do help a lot, but still don't get so much attention, for various reasons, for instance, when they were released, they were ahead of their time and now are more or less forgotten. What type of programming tool do you think is the most underestimated one? Motivate your answer.

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  • problem with grub-efi

    - by Jesper
    I am installing ubuntu on my MacBook, following the instructions here: http://www.rodsbooks.com/ubuntu-efi/index.html Everything has gone well so far. But I have now come to number 19. The cd with GRUB2 is in the drive, but when I type 'sudo apt-get install grub-efi' it says: package grub-efi is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source However the following packages replace it: grub2-common grub-common The Grub iso I downloaded and burned was this one: http://forja.cenatic.es/frs/download.php/1381/super_grub_disk_hybrid-1.98s1.iso

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  • Summit Time!

    - by Ajarn Mark Caldwell
    Boy, how time flies!  I can hardly believe that the 2011 PASS Summit is just one week away.  Maybe it snuck up on me because it’s a few weeks earlier than last year.  Whatever the cause, I am really looking forward to next week.  The PASS Summit is the largest SQL Server conference in the world and a fantastic networking opportunity thrown in for no additional charge.  Here are a few thoughts to help you maximize the week. Networking As Karen Lopez (blog | @DataChick) mentioned in her presentation for the Professional Development Virtual Chapter just a couple of weeks ago, “Don’t wait until you need a new job to start networking.”  You should always be working on your professional network.  Some people, especially technical-minded people, get confused by the term networking.  The first image that used to pop into my head was the image of some guy standing, awkwardly, off to the side of a cocktail party, trying to shmooze those around him.  That’s not what I’m talking about.  If you’re good at that sort of thing, and you can strike up a conversation with some stranger and learn all about them in 5 minutes, and walk away with your next business deal all but approved by the lawyers, then congratulations.  But if you’re not, and most of us are not, I have two suggestions for you.  First, register for Don Gabor’s 2-hour session on Tuesday at the Summit called Networking to Build Business Contacts.  Don is a master at small talk, and at teaching others, and in just those two short hours will help you with important tips about breaking the ice, remembering names, and smooth transitions into and out of conversations.  Then go put that great training to work right away at the Tuesday night Welcome Reception and meet some new people; which is really my second suggestion…just meet a few new people.  You see, “networking” is about meeting new people and being friendly without trying to “work it” to get something out of the relationship at this point.  In fact, Don will tell you that a better way to build the connection with someone is to look for some way that you can help them, not how they can help you. There are a ton of opportunities as long as you follow this one key point: Don’t stay in your hotel!  At the least, get out and go to the free events such as the Tuesday night Welcome Reception, the Wednesday night Exhibitor Reception, and the Thursday night Community Appreciation Party.  All three of these are perfect opportunities to meet other professionals with a similar job or interest as you, and you never know how that may help you out in the future.  Maybe you just meet someone to say HI to at breakfast the next day instead of eating alone.  Or maybe you cross paths several times throughout the Summit and compare notes on different sessions you attended.  And you just might make new friends that you look forward to seeing year after year at the Summit.  Who knows, it might even turn out that you have some specific experience that will help out that other person a few months’ from now when they run into the same challenge that you just overcame, or vice-versa.  But the point is, if you don’t get out and meet people, you’ll never have the chance for anything else to happen in the future. One more tip for shy attendees of the Summit…if you can’t bring yourself to strike up conversation with strangers at these events, then at the least, after you sit through a good session that helps you out, go up to the speaker and introduce yourself and thank them for taking the time and effort to put together their presentation.  Ideally, when you do this, tell them WHY it was beneficial to you (e.g. “Now I have a new idea of how to tackle a problem back at the office.”)  I know you think the speakers are all full of confidence and are always receiving a ton of accolades and applause, but you’re wrong.  Most of them will be very happy to hear first-hand that all the work they put into getting ready for their presentation is paying off for somebody. Training With over 170 technical sessions at the Summit, training is what it’s all about, and the training is fantastic!  Of course there are the big-name trainers like Paul Randall, Kimberly Tripp, Kalen Delaney, Itzik Ben-Gan and several others, but I am always impressed by the quality of the training put on by so many other “regular” members of the SQL Server community.  It is amazing how you don’t have to be a published author or otherwise recognized as an “expert” in an area in order to make a big impact on others just by sharing your personal experience and lessons learned.  I would rather hear the story of, and lessons learned from, “some guy or gal” who has actually been through an issue and came out the other side, than I would a trained professor who is speaking just from theory or an intellectual understanding of a topic. In addition to the three full days of regular sessions, there are also two days of pre-conference intensive training available.  There is an extra cost to this, but it is a fantastic opportunity.  Think about it…you’re already coming to this area for training, so why not extend your stay a little bit and get some in-depth training on a particular topic or two?  I did this for the first time last year.  I attended one day of extra training and it was well worth the time and money.  One of the best reasons for it is that I am extremely busy at home with my regular job and family, that it was hard to carve out the time to learn about the topic on my own.  It worked out so well last year that I am doubling up and doing two days or “pre-cons” this year. And then there are the DVDs.  I think these are another great option.  I used the online schedule builder to get ready and have an idea of which sessions I want to attend and when they are (much better than trying to figure this out at the last minute every day).  But the problem that I have run into (seems this happens every year) is that nearly every session block has two different sessions that I would like to attend.  And some of them have three!  ACK!  That won’t work!  What is a guy supposed to do?  Well, one option is to purchase the DVDs which are recordings of the audio and projected images from each session so you can continue to attend sessions long after the Summit is officially over.  Yes, many (possibly all) of these also get posted online and attendees can access those for no extra charge, but those are not necessarily all available as quickly as the DVD recording are, and the DVDs are often more convenient than downloading, especially if you want to share the training with someone who was not able to attend in person. Remember, I don’t make any money or get any other benefit if you buy the DVDs or from anything else that I have recommended here.  These are just my own thoughts, trying to help out based on my experiences from the 8 or so Summits I have attended.  There is nothing like the Summit.  It is an awesome experience, fantastic training, and a whole lot of fun which is just compounded if you’ll take advantage of the first part of this article and make some new friends along the way.

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  • Multiple domains and product categories but one company?

    - by Brad
    Hi Guys, My company is expanding online, and we are wondering the best way to go about our eCommerce strategy. We sell a wide range of products of a single material, lets use ceramics as an example. The current competition in our niche online is medium level. We currently have one site selling all our range: ceramicstuff.com However I have just found that ceramickitchenware.com, ceramicbowls.com, etc are currently unregistered, despite quite decent traffic search volume around those keywords monthly. What do you guys think about registering these domains to increase traffic? Would I put a standalone sites on those domains, or do I point them to my main domain? Or do I use them a "micro" sites to offer information, and then link to buy at my main domain, etc? Summary: I'm looking to employ "spammy" type SEO tricks, multiple domains, etc but the key point is I will be generating REAL content, and offering a REAL QUALITY product. How to proceed? Thanks!

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  • JUJU and ERROR environment has no access-key or secret-key

    - by Riccardo Magrini
    following the official guide: [1]https://juju.ubuntu.com/docs/config-maas.html and considered that I've generated the ssh key (added it to UI of MAAS) and the API key, my environments.yaml file presents in this way: environments: maas: type: maas maas-server: 'http://x.x.x.x/MAAS/' maas-oauth: 'NDPA86PsEzS7bFynSy:vqJLkyHUJbvYzbtY5Q:sXXXXXXXXXXXXXXXXXXXXXX admin-secret: 'nothing' default-series: precise authorized-keys-path: ~/.ssh/id_rsa.pub # or any file you want. when I try to run the command: juju bootstrap receive the following error: ERROR environment has no access-key or secret-key Someone can explain me where is the wrong? MAAS and JUJU are installed using their ppa stable on an Ubuntu 12.04.3 Server

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  • How to implement Cache in web apps?

    - by Jhonnytunes
    This is really two questions. Im doing a project for the university for storing baseball players statitics, but from baseball data I have to calculate the score by year for the player who is beign displayed. The background is, lets say 10, 000 users hit the player "Alex Rodriguez", the application have to calculate 10, 000 the A-Rod stats by years intead of just read it from some where is temporal saved. Here I go: What is the best method for caching this type of data? Do I have to used the same database, and some temporal values on the same database, or create a Web Service for that? What reading about web caching so you recommend?

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  • What are graphs in laymen's terms

    - by Justin984
    What are graphs, in computer science, and what are they used for? In laymen's terms preferably. I have read the definition on Wikipedia: In computer science, a graph is an abstract data type that is meant to implement the graph and hypergraph concepts from mathematics. A graph data structure consists of a finite (and possibly mutable) set of ordered pairs, called edges or arcs, of certain entities called nodes or vertices. As in mathematics, an edge (x,y) is said to point or go from x to y. The nodes may be part of the graph structure, or may be external entities represented by integer indices or references. but I'm looking for a less formal, easier to understand definition.

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