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  • Take a Tour of Google’s Data Centers

    - by Jason Fitzpatrick
    Miles of cables, robots archiving backup tapes, and quarter-million-gallon cooling tanks: take of tour of Google’s data centers to see just how the search giant fuels the engine that delivers your search results so quickly. The collection of photos includes data centers around the world and offers a rare behind the scenes look at their operations. In some cases, we’re even treated to a literal behind the scenes view as seen in the photo above, from the Mayes County, Oklahoma data center: A rare look behind the server aisle. Here hundreds of fans funnel hot air from the server racks into a cooling unit to be recirculated. The green lights are the server status LEDs reflecting from the front of our servers. Hit up the link below for the full tour that includes photos and information about the data centers, the people that run them, and even a Street View style tour inside. Where the Internet Lives [Google Data Centers] Why Enabling “Do Not Track” Doesn’t Stop You From Being Tracked HTG Explains: What is the Windows Page File and Should You Disable It? How To Get a Better Wireless Signal and Reduce Wireless Network Interference

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  • What must one know when approaching web development?

    - by Tal Koren
    I just started working as a novice Web Developer. I know PHP pretty well, as well as some basic jQuery. Anyway, my boss told me I should explore and learn about MVC, Memcache, Design Patterns, how Apache servers work and how to set one up etc. What I want to ask is actually this: What should I learn further? Web Development is a big area and most odds are that I'll never stop learning, but what are the basics I should learn about? What are the fundamentals? Currently I'm focusing on Server Side Development, but a very big part of me also wants to become a front-end ninja, so please consider that in your comments. Thanks in advance, you rock. :)

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  • Data Warehouse Best Practices

    - by jean-pierre.dijcks
    In our quest to share our endless wisdom (ahem…) one of the things we figured might be handy is recording some of the best practices for data warehousing. And so we did. And, we did some more… We now have recreated our websites on Oracle Technology Network and have a separate page for best practices, parallelism and other cool topics related to data warehousing. But the main topic of this post is the set of recorded best practices. Here is what is available (and it is a series that ties together but can be read independently), applicable for almost any database version: Partitioning 3NF schema design for a data warehouse Star schema design Data Loading Parallel Execution Optimizer and Stats management The best practices page has a lot of other useful information so have a look here.

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  • Native, FOSS GUI prototyping tools?

    - by Oli
    As part of my job as a web developer, I spend an amount of time doing UI prototypes to show the client. It's a pain in the behind but sometimes it has to be done. I've seen Shuttleworth (and the design team) pump out images like this: That's made by something called Balsamiq Mockups... Something that balances on top of Adobe Air (yack!) and costs $79. I've tried it but it kept falling over. I think it had something to do with Air not the app itself. My point is if I'm paying out for something, I want it to be native.

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  • Validating Petabytes of Data with Regularity and Thoroughness

    - by rickramsey
    by Brian Zents When former Intel CEO Andy Grove said “only the paranoid survive,” he wasn’t necessarily talking about tape storage administrators, but it’s a lesson they’ve learned well. After all, tape storage is the last line of defense to prevent data loss, so tape administrators are extra cautious in making sure their data is secure. Not surprisingly, we are often asked for ways to validate tape media and the files on them. In the past, an administrator could validate the media, but doing so was often tedious or disruptive or both. The debut of the Data Integrity Validation (DIV) and Library Media Validation (LMV) features in the Oracle T10000C drive helped eliminate many of these pains. Also available with the Oracle T10000D drive, these features use hardware-assisted CRC checks that not only ensure the data is written correctly the first time, but also do so much more efficiently. Traditionally, a CRC check takes at least 25 seconds per 4GB file with a 2:1 compression ratio, but the T10000C/D drives can reduce the check to a maximum of nine seconds because the entire check is contained within the drive. No data needs to be sent to a host application. A time savings of at least 64 percent is extremely beneficial over the course of checking an entire 8.5TB T10000D tape. While the DIV and LMV features are better than anything else out there, what storage administrators really need is a way to check petabytes of data with regularity and thoroughness. With the launch of Oracle StorageTek Tape Analytics (STA) 2.0 in April, there is finally a solution that addresses this longstanding need. STA bundles these features into one interface to automate all media validation activities across all Oracle SL3000 and SL8500 tape libraries in an environment. And best of all, the validation process can be associated with the health checks an administrator would be doing already through STA. In fact, STA validates the media based on any of the following policies: Random Selection – Randomly selects media for validation whenever a validation drive in the standalone library or library complex is available. Media Health = Action – Selects media that have had a specified number of successive exchanges resulting in an Exchange Media Health of “Action.” You can specify from one to five exchanges. Media Health = Evaluate – Selects media that have had a specified number of successive exchanges resulting in an Exchange Media Health of “Evaluate.” You can specify from one to five exchanges. Media Health = Monitor – Selects media that have had a specified number of successive exchanges resulting in an Exchange Media Health of “Monitor.” You can specify from one to five exchanges. Extended Period of Non-Use – Selects media that have not had an exchange for a specified number of days. You can specify from 365 to 1,095 days (one to three years). Newly Entered – Selects media that have recently been entered into the library. Bad MIR Detected – Selects media with an exchange resulting in a “Bad MIR Detected” error. A bad media information record (MIR) indicates degraded high-speed access on the media. To avoid disrupting host operations, an administrator designates certain drives for media validation operations. If a host requests a file from media currently being validated, the host’s request takes priority. To ensure that the administrator really knows it is the media that is bad, as opposed to the drive, STA includes drive calibration and qualification features. In addition, validation requests can be re-prioritized or cancelled as needed. To ensure that a specific tape isn’t validated too often, STA prevents a tape from being validated twice within 24 hours via one of the policies described above. A tape can be validated more often if the administrator manually initiates the validation. When the validations are complete, STA reports the results. STA does not report simply a “good” or “bad” status. It also reports if media is even degraded so the administrator can migrate the data before there is a true failure. From that point, the administrators’ paranoia is relieved, as they have the necessary information to make a sound decision about the health of the tapes in their environment. About the Photograph Photograph taken by Rick Ramsey in Death Valley, California, May 2014 - Brian Follow OTN Garage on: Web | Facebook | Twitter | YouTube

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  • database api commands

    - by Rahul Mehta
    As I am developing database api for a project. I am developing commands for getting data from database. e.g. i have one gib table so command for that is getgib name alias limit fields if user pass the name e.g. getgib rahul than it will return all the gib data whose name is like rahul. if alias is given than it will return the all the gib owned by the user whose alias(userid) given . So i want to design the commands. limit : is to limit the record in query, fields : is the extra fields i want to add in the select query . so as now commands are set but now Question 1 : i want the gibs by the gibid , so how to make this or any suggestion to improve my command is welcome. Question 2 : if user don't want to specify the name , and he want only the gibs by providing alias then at this what separator at the place of name i should used.

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  • The Open Data Protocol

    - by Bobby Diaz
    Well, day 2 of the MIX10 conference did not disappoint.  The keynote speakers introduced the preview release of IE9, which looks really cool and quick, and Visual Studio 2010 RC that is scheduled to RTM on April 12th.  It seemed to have a lot of improvements aimed at making developers more productive.  Here are the current links to these two offerings: Internet Explorer 9 – Platform Preview Visual Studio 2010 and .NET 4 – Release Candidate While both of these were interesting, the demos that really blew me away today centered around the work being done with The Open Data Protocol, or OData for short!  OData is a recommended standard being pushed by Microsoft that uses a REST based interface to interact with various types of data in a uniform manner.  Data producers then provide the data to consumer in either ATOM or JSON formats as requested by the client application. The OData SDK contains client and server libraries for many of the popular languages in use today, including .NET, Java, PHP, Objective C and JavaScript, so you consume or even produce your own OData services.  More information can be found using the following links: OData.org How to navigate an OData compliant service Query Functions (WCF Data Services) Netflix has made available one of the first live OData services by exposing their entire movie catalog.  You can browse and query using URLs similar to the following: http://odata.netflix.com/ http://odata.netflix.com/Catalog/Genres('Horror')/CatalogTitles http://odata.netflix.com/Catalog/CatalogTitles?$filter=startswith(Title/Regular,%20'Star%20Wars')&$orderby=Title/Regular So now I just need to find an excuse reason to start using OData in a real project! Enjoy!

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  • What can Go chan do that a list cannot?

    - by alpav
    I want to know in which situation Go chan makes code much simpler than using list or queue or array that is usually available in all languages. As it was stated by Rob Pike in one of his speeches about Go lexer, Go channels help to organize data flow between structures that are not homomorphic. I am interested in a simple Go code sample with chan that becomes MUCH more complicated in another language (for example C#) where chan is not available. I am not interested in samples that use chan just to increase performance by avoiding waiting of data between generating list and consuming the list (which can be solved by chunking) or as a way to organize thread safe queue or thread-safe communication (which can be easily solved by locking primitives). I am interested in a sample that makes code simpler structurally disregarding size of data. If such sample does not exist then sample where size of data matters. I guess desired sample would contain bi-directional communication between generator and consumer. Also if someone could add tag [channel] to the list of available tags, that would be great.

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  • Windows Azure End to End Examples

    - by BuckWoody
    I’m fascinated by the way people learn. I’m told there are several methods people use to understand new information, from reading to watching, from experiencing to exploring. Personally, I use multiple methods of learning when I encounter a new topic, usually starting with reading a bit about the concepts. I quickly want to put those into practice, however, especially in the technical realm. I immediately look for examples where I can start trying out the concepts. But I often want a “real” example – not just something that represents the concept, but something that is real-world, showing some feature I could actually use. And it’s no different with the Windows Azure platform – I like finding things I can do now, and actually use. So when I started learning Windows Azure, I of course began with the Windows Azure Training Kit – which has lots of examples and labs, presentations and so on. But from there, I wanted more examples I could learn from, and eventually teach others with. I was asked if I would write a few of those up, so here are the ones I use. CodePlex CodePlex is Microsoft’s version of an “Open Source” repository. Anyone can start a project, add code, documentation and more to it and make it available to the world, free of charge, using various licenses as they wish. Microsoft also uses this location for most of the examples we publish, and sample databases for SQL Server. If you search in CodePlex for “Azure”, you’ll come back with a list of projects that folks have posted, including those of us at Microsoft. The source code and documentation are there, so you can learn using actual examples of code that will do what you need. There’s everything from a simple table query to a full project that is sort of a “Corporate Dropbox” that uses Windows Azure Storage. The advantage is that this code is immediately usable. It’s searchable, and you can often find a complete solution to meet your needs. The disadvantage is that the code is pretty specific – it may not cover a huge project like you’re looking for. Also, depending on the author(s), you might not find the documentation level you want. Link: http://azureexamples.codeplex.com/site/search?query=Azure&ac=8    Tailspin Microsoft Patterns and Practices is a group here that does an amazing job at sharing standard ways of doing IT – from operations to coding. If you’re not familiar with this resource, make sure you read up on it. Long before I joined Microsoft I used their work in my daily job – saved a ton of time. It has resources not only for Windows Azure but other Microsoft software as well. The Patterns and Practices group also publishes full books – you can buy these, but many are also online for free. There’s an end-to-end example for Windows Azure using a company called “Tailspin”, and the work covers not only the code but the design of the full solution. If you really want to understand the thought that goes into a Platform-as-a-Service solution, this is an excellent resource. The advantages are that this is a book, it’s complete, and it includes a discussion of design decisions. The disadvantage is that it’s a little over a year old – and in “Cloud” years that’s a lot. So many things have changed, improved, and have been added that you need to treat this as a resource, but not the only one. Still, highly recommended. Link: http://msdn.microsoft.com/en-us/library/ff728592.aspx Azure Stock Trader Sometimes you need a mix of a CodePlex-style application, and a little more detail on how it was put together. And it would be great if you could actually play with the completed application, to see how it really functions on the actual platform. That’s the Azure Stock Trader application. There’s a place where you can read about the application, and then it’s been published to Windows Azure – the production platform – and you can use it, explore, and see how it performs. I use this application all the time to demonstrate Windows Azure, or a particular part of Windows Azure. The advantage is that this is an end-to-end application, and online as well. The disadvantage is that it takes a bit of self-learning to work through.  Links: Learn it: http://msdn.microsoft.com/en-us/netframework/bb499684 Use it: https://azurestocktrader.cloudapp.net/

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  • Returning a mock object from a mock object

    - by Songo
    I'm trying to return an object when mocking a parser class. This is the test code using PHPUnit 3.7 //set up the result object that I want to be returned from the call to parse method $parserResult= new ParserResult(); $parserResult->setSegment('some string'); //set up the stub Parser object $stubParser=$this->getMock('Parser'); $stubParser->expects($this->any()) ->method('parse') ->will($this->returnValue($parserResult)); //injecting the stub to my client class $fileHeaderParser= new FileWriter($stubParser); $output=$fileParser->writeStringToFile(); Inside my writeStringToFile() method I'm using $parserResult like this: writeStringToFile(){ //Some code... $parserResult=$parser->parse(); $segment=$parserResult->getSegment();//that's why I set the segment in the test. } Should I mock ParserResult in the first place, so that the mock returns a mock? Is it good design for mocks to return mocks? Is there a better approach to do this all?!

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  • Rapid prototyping and refactoring

    - by Puckl
    Sometimes when I start a small project (like an android app), I don´t know which approach will work out at the end, and I just go for one approach and give it a try. But if I never used this approach before (for a sort of application I´ve never programmed before) it is like stepping into unknown terrain. I don´t know which libraries to use (maybe I have to try out several libraries) and there are so many unkonwns (like: how to get raw audio data in android) So then my development process goes like this: Write a piece of code to see if the approach has a chance. (The more uncertain the approach is, the uglier the code gets) If it works, refactor a lot until it is beautiful I think it could be a waste of time if I planned my software design in detail at this point, it would be like planning a trip without a map. Is this part of aglie development? How do you deal with unknown terrain in software development?

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  • Any experience on open source database synchronization open source solutions? [on hold]

    - by Boris Pavlovic
    I'm considering few database synchronization open source solutions. The system in need for data synchronization is composed of instances of different types of databases, i.e. heterogeneous system. There are few candidates: Symmetric DS Talend's Data Integration with support for data synchronization Continuent's Tungsteen Replication Daffodil Replicator OS Do you have any real world experience with any of these tools?

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  • 'Getting Started with Oracle Data Integrator 11g: A Hands-On Tutorial' book is now available

    - by Julien Testut
    We are pleased to announce the availability of the first book on Oracle Data Integrator published by Packt Publishing:  Getting Started with Oracle Data Integrator 11g – A Hands-On Tutorial Authors: Peter C. Boyd-Bowman, Christophe Dupupet, Denis Gray, David Hecksel,  Julien Testut, Bernard Wheeler. Congratulations to everyone who contributed to this book! You can get more information about 'Getting Started with Oracle Data Integrator 11g – A Hands-On Tutorial' including the table of contents and a sample chapter at http://www.packtpub.com/oracle-data-integrator-11g-getting-started/book. The book is available on Amazon.com, Amazon.co.uk, Barnes & Noble and Safari Books Online.

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  • Accessing SharePoint 2010 Data with REST/OData on Windows Phone 7

    Consuming SharePoint 2010 data in Windows Phone 7 applications using the CTP version of the developer tools is quite a challenge. The issue is that the SharePoint 2010 data is not anonymously available; users need to authenticate to be able to access the data. When I first tried to access SharePoint 2010 data from my first Hello-World-type Windows Phone 7 application I thought Hey, this should be easy! because Windows Phone 7 development based on Silverlight and SharePoint 2010 has a Client Object...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Best approach for a database of long strings

    - by gsingh2011
    I need to store questions and answers in a database. The questions will be one to two sentences, but the answers will be long, at least a paragraph, likely more. The only way I know about to do this right now is an SQL database. However, I don't feel like this is a good solution because as far as I've seen, these databases aren't used for data of this type or size. Is this the correct way to go or is there a better way to store this data? Is there a better way than storing raw strings?

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  • SQLAuthority News – Download Whitepaper – Enabling and Securing Data Entry with Analysis Services Writeback

    - by pinaldave
    SQL Server Analysis Service have many features which are commonly requested and many already exists in the system. Security Data Entry is very important feature and SSAS supports writeback feature.  Analysis Services is a tool for aggregating information and providing business users with the ability to analyze and support decision making in their business. By using the built-in writeback feature in Analysis Services, business users can also modify their data points to perform what-if analysis or supplement any existing data. The techniques described in this article derive from the author’s professional experience in the design and development of complex financial analysis applications used by various business groups in a large multinational company. Download Whitepaper Enabling and Securing Data Entry with Analysis Services Writeback. 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

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  • How can I restore my deleted calendar data in Windows Live Mail ?

    - by Cheryl
    I have been using the calendar in Windows Live Mail for months now. When I logged on yesterday, all of the data and appointments I have been inputting for months is gone. The calendar is completely blank. I have performed a system restore with no luck. I have run in safe mode with no luck. I have run a check disk in DOS with no luck. Any other ideas on what I can do to find my calendar info? Could the file be corrupt? I rely on this calendar and all of my info is gone, so any help will be greatly appreciated.

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  • Partnering with a web designer to build and launch websites for fun. Where should I look for someone? [closed]

    - by FastCoder
    I have been working with web sites and web development for a long time and as a result I am able to build and launch complex websites (social network, dating site, stackoverflow, etc.) in little time (1-3 weeks). Problem is: I know very little about CSS, page layout, photoshop and graphic design. Of course I know HTML but when it comes to putting together something that looks good I am horrible. I just don't have the artistic skills. I wanted to launch some websites without any silly or naive intent to take over the world. Just for fun and to improve the portfolio. How do you guys recommend that I approach this problem of "finding this right partner" with the same mindset? Where should I look for this person? I have no idea... :(

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  • I don't really understand "Backend/Serverside" when it comes to web-development?

    - by Mercfh
    In the Web development world, what exactly do backend/server-side programmers do? I guess I don't really understand the whole concept. I've done the HTML/CSS layouts and website design and a little bit of SQL with PHP (still enhancing my skills, it's more of a side project for me). I've also done a small amount of JavaScript/JQuery. But I don't understand the "backend" work, such as the scripting languages (Rails/Python/etc) and such. What exactly do you "do" with them? Are there any books on the subject? I'm not even sure what it means. Is it kinda like what Web Application Frameworks do? Or not so much?

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  • Learning PostgreSql: bulk loading data

    - by Alexander Kuznetsov
    In this post we shall start loading data in bulk. For better performance of inserts, we shall load data into a table without constraints and indexes. This sounds familiar. There is a bulk copy utility, and it is very easy to invoke from C#. The following code feeds the output from a T-SQL stored procedure into a PostgreSql table: using ( var pgTableTarget = new PgTableTarget ( PgConnString , "Data.MyPgTable" , GetColumns ())) using ( var conn = new SqlConnection ( connectionString )) { conn.Open...(read more)

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  • SQL SERVER – CSVExpress and Quick Data Load

    - by pinaldave
    One of the newest ETL tools is CSVexpress.com.  This is a program that can quickly load any CSV file into ODBC compliant databases uses data integration.  For those of you familiar with databases and how they operate, the question that comes to mind might be what use this program will have in your life. I have written earlier article on this subject over here SQL SERVER – Import CSV into Database – Transferring File Content into a Database Table using CSVexpress. You might know that RDBMS have automatic support for loading CSV files into tables – but it is not quite as easy as one click of a button.  First of all, most databases have a command line interface and you need the file and configuration script in order to load up.  You also need to know enough to write the script – which for novices can be extremely daunting.  On top of all this, if you work with more than one type of RDBMS, you need to know the ins and outs of uploading and writing script for more than one program. So you might begin to see how useful CSVexpress.com might be!  There are many other tools that enable uploading files to a database.  They can be very fancy – some can generate configuration files automatically, others load the data directly.  Again, novices will be able to tell you why these aren’t the most useful programs in the world.  You see, these programs were created with SQL in mind, not for uploading data.  If you don’t have large amounts of data to upload, getting the configurations right can be a long process and you will have to check the code that is generated yourself.  Not exactly “easy to use” for novices. That makes CSVexpress.com one of the best new tools available for everyone – but especially people who don’t want to learn a lot of new material all at once.  CSVexpress has an easy to navigate graphical user interface and no scripting or coding is required.  There are built-in constraints and data validations, and you can configure transforms and reject records right there on the screen.  But the best thing of all – it’s free! That’s right, you can download CSVexpress for free from www.csvexpress.com and start easily uploading and configuring riles almost immediately.  If you’re currently happy with your method of data configuration, keep up with the good work.  For the rest of us, there’s CSVexpress.com. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: Pinal Dave, PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, SQL Utility, T SQL, Technology

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  • Book Review (Book 11) - Applied Architecture Patterns on the Microsoft Platform

    - by BuckWoody
    This is a continuation of the books I challenged myself to read to help my career - one a month, for year. You can read my first book review here, and the entire list is here. The book I chose for April 2012 was: Applied Architecture Patterns on the Microsoft Platform. I was traveling at the end of last month so I’m a bit late posting this review here. Why I chose this book: I actually know a few of the authors on this book, so when they told me about it I wanted to check it out. The premise of the book is exactly as it states in the title - to learn how to solve a problem using products from Microsoft. What I learned: I liked the book - a lot. They've arranged the content in a "Solution Decision Framework", that presents a few elements to help you identify a need and then propose alternate solutions to solve them, and then the rationale for the choice. But the payoff is that the authors then walk through the solution they implement and what they ran into doing it. I really liked this approach. It's not a huge book, but one I've referred to again since I've read it. It's fairly comprehensive, and includes server-oriented products, not things like Microsoft Office or other client-side tools. In fact, I would LOVE to have a work like this for Open Source and other vendors as well - would make for a great library for a Systems Architect. This one is unashamedly aimed at the Microsoft products, and even if I didn't work here, I'd be fine with that. As I said, it would be interesting to see some books on other platforms like this, but I haven't run across something that presents other systems in quite this way. And that brings up an interesting point - This book is aimed at folks who create solutions within an organization. It's not aimed at Administrators, DBA's, Developers or the like, although I think all of those audiences could benefit from reading it. The solutions are made up, and not to a huge level of depth - nor should they be. It's a great exercise in thinking these kinds of things through in a structured way. The information is a bit dated, especially for Windows and SQL Azure. While the general concepts hold, the cloud platform from Microsoft is evolving so quickly that any printed book finds it hard to keep up with the improvements. I do have one quibble with the text - the chapters are a bit uneven. This is always a danger with multiple authors, but it shows up in a couple of chapters. I winced at one of the chapters that tried to take a more conversational, humorous style. This kind of academic work doesn't lend itself to that style. I recommend you get the book - and use it. I hope they keep it updated - I'll be a frequent customer. :)  

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  • Webcast Replay Available: Scrambling Sensitive Data in E-Business Suite Release 12 Cloned Environments

    - by BillSawyer
    I am pleased to release the replay and presentation for ATG Live Webcast Scrambling Sensitive Data in EBS 12 Cloned Environments (Presentation) Eric Bing, Senior Director, Jagan Athreya, Enterprise Manager Product Management, and Elke Phelps, Senior Principal Product Manager, discussed the Oracle E-Business Suite Template for Data Masking Pack, and how it can be used in situations where confidential or regulated data needs to be shared with other non-production users who need access to some of the original data, but not necessarily every table.  Examples of non-production users include internal application developers or external business partners such as offshore testing companies, suppliers or customers. (July 2012) Finding other recorded ATG webcastsThe catalog of ATG Live Webcast replays, presentations, and all ATG training materials is available in this blog's Webcasts and Training section.

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