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• Converting 2D coordinates from multiple viewpoints into 3D coordinates

  - by Kirk Smith

  Here's the situation. I've got a set of 2D coordinates that specify a point on an image. These 2D coordinates relate to an event that happened in a 3D space (video game). I have 5 images with the same event point on it, so I have 5 sets of 2D coordinates for a single 3D coordinate. I've tried everything I can think to translate these 2D coordinates into 3D coordinates, but the math just escapes me. I have a good estimate of the coordinates from which each image was taken, they're not perfect but they're close. I tried simplifying this and opening up Cinema 4D, a 3D modeling application. I placed 5 cameras at the coordinates where the pictures were taken and lined up the pictures with the event points for each one and tried to find a link, but nothing was forthcoming. I know it's a math question, but like I said, I just can't get it. I took physics in high school 6 years ago, but we didn't deal with a whole lot of this sort of thing. Any help will be very much appreciated, I've been thinking on it for quite a while and I just can't come up with anything.

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• Consolidate SQL Server Reporting Services

  - by Eric C. Singer

  I've been a big fan of consolidating as many DB's to a few SQL servers for a while and I've had great success with it. However, I've never had to deal with SQL reporting services. Has anyone migrated SSRS from a bunch of random SQL servers into a consolidated SQL server? I don't exactly know a whole lot about SSRS which is part of the problem. To my knowlege, it's one DB per SSRS instance, so it sounds like i'd need to find a way of exporting data and merging it. Basically the process used to look like: Move DB from SQL Express to shared SQL server Change point in APP to point at new SQL server With reporting services, how do I move the reporting service compenent of the DB as well? I realize I may need to tweak the app, but my question is on the SQL side.

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• How do I manage the technical debate over WCF vs. Web API?

  - by Saeed Neamati

  I'm managing a team of like 15 developers now, and we are stuck at a point on choosing the technology, where the team is broken into two completely opposite teams, debating over usage of WCF vs. Web API. Team A which supports usage of Web API, brings forward these reasons: Web API is just the modern way of writing services (Wikipedia) WCF is an overhead for HTTP. It's a solution for TCP, and Net Pipes, and other protocols WCF models are not POCO, because of [DataContract] & [DataMember] and those attributes SOAP is not as readable and handy as JSON SOAP is an overhead for network compared to JSON (transport over HTTP) No method overloading Team B which supports the usage of WCF, says: WCF supports multiple protocols (via configuration) WCF supports distributed transactions Many good examples and success stories exist for WCF (while Web API is still young) Duplex is excellent for two-way communication This debate is continuing, and I don't know what to do now. Personally, I think that we should use a tool only for its right place of usage. In other words, we'd better use Web API, if we want to expose a service over HTTP, but use WCF when it comes to TCP and Duplex. By searching the Internet, we can't get to a solid result. Many posts exist for supporting WCF, but on the contrary we also find people complaint about it. I know that the nature of this question might sound arguable, but we need some good hints to decide. We're stuck at a point where choosing a technology by chance might make us regret it later. We want to choose with open eyes. Our usage would be mostly for web, and we would expose our services over HTTP. In some cases (say 5 to 10 percent) we might need distributed transactions though. What should I do now? How do I manage this debate in a constructive way?

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• VPN - force a selective range of ip to run on VPN (linux)

  - by Francesco

  Preface: I know there are similar question here and there however I'm a kind of newbie on Net stuff so I need an answer on this specific scenario, hoping that can help others too as it is a common problem Let say I cannot do anything on the local switch to change the local ip range, I don't want to use any complicate trick as use VMachine to hide the local ip range but I want to use net tools to solve the issue. Scenario my local net assign me an IP of this class 192.168.1.xxx (ex. 192.168.1.116) and my VPN (VPNC) assign me IP of same class 192.168.1.xxx (ex. 192.168.1.247) Obviously I need VPN to access local address (ex. 192.168.1.100) but when I open any address of the class 192.168.1.xx the route point to my local net and not to the VPN ones. I'm on linux and i'd like gui solution (network manager) in case it is not possible let play with route command. here what network manager offer me: Here my actual route once connected to the VPN: Here some route information (route -n) Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 0.0.0.0 0.0.0.0 U 0 0 0 ppp0 169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 wlan0 182.71.21.106 192.168.1.1 255.255.255.255 UGH 0 0 0 wlan0 182.71.21.106 192.168.1.1 255.255.255.255 UGH 0 0 0 wlan0 192.168.1.0 0.0.0.0 255.255.255.0 U 9 0 0 wlan0 192.168.1.246 0.0.0.0 255.255.255.255 UH 0 0 0 ppp0 Here my ifconfig : ppp0 Link encap:Point-to-Point Protocol inet addr:192.168.1.247 P-t-P:192.168.1.246 Mask:255.255.255.255 UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1400 Metric:1 RX packets:3415 errors:0 dropped:0 overruns:0 frame:0 TX packets:2525 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:3 RX bytes:3682328 (3.6 MB) TX bytes:402315 (402.3 KB) wlan0 Link encap:Ethernet HWaddr 4c:eb:42:06:a3:a6 inet addr:192.168.1.116 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::4eeb:42ff:fe06:a3a6/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:72598 errors:0 dropped:0 overruns:0 frame:0 TX packets:42300 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:76000532 (76.0 MB) TX bytes:13919400 (13.9 MB) The Question So basically I would like to add a rule to force this particular address (192.168.1.100) on the VPN and not on my local net

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• SQL Developer: Describe versus Ctrl+Click to Open Database Objects

  - by thatjeffsmith

  In yesterday’s post I talked about you could use SQL Developer’s Describe (SHIFT+F4) to open a PL/SQL Package at your cursor. You might get an error if you try to describe this… If you actually try to describe the package as you see it in the above screenshot, you’ll get an error: Doh! I neglected to say in yesterday’s post that I was highlighting the package name before I hit SHIFT+F4. This works just fine, but it will work even better in our next release as we’ve fixed this issue. Until then, you can also try the Ctrl+Hover with your mouse. For PL/SQL calls you can open the source immediately based on what you’re hovering over with your mouse cursor. You could try this with “dbms_output.put_line(” too Ctrl+Click, It’s not just for PL/SQL If you don’t like the floating describe windows you get when you do a SHIFT+F4 on a database object, the ctrl+click will work too. Instead of opening a normal ‘hover’ panel, you’ll be taken directly to the object editor for that table, view, etc. Go ahead and try it right now. Paste this into your worksheet, then ctrl+click with your mouse over the table name: select * from scott.emp And now you know, the rest of the story.

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• Choosing a web development framework?

  - by Bob

  So, I've sort of reached a point where I want to start developing a website. Originally, I planned to build said website using PHP and CodeIgniter, I'm familiar with both, but, truth be told, I'm not too fond of either. I find they just get rather messy, CodeIgniter helps somewhat, but no matter what, it seems that most PHP comes out more obfuscated than it has to be. Anyways, I've come to the point where I want to either use Python or Ruby. I'm familiar in both, though more so towards Python, but I've never done any web development in them. I'll take the necessary time to learn the frameworks (and further my knowledge in the language of my choosing), but I need to choose one. I don't like either language more than the other, they both have their benefits... However, since I've never done any web development with either language, I was hoping that you guys could give me some pointers. What are the available frameworks for each language? What do you recommend and why? Note: I've primarily looked into Rails and Django - but I'm still open to others. I'm looking for one that will work for just one (or maybe two) developers. It has to be fairly easy to learn (but I will take the time to learn it). Also, I'd like it to easily support clean code and agile development.

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• Hosting DokuWiki on a Stick

  - by Rook

  I have a rather middlish DokuWiki on a stick project documentation which I've always used offline, since I was the only author which did documentation. Now the mentioned project is somewhat expanding, and I need a way and a place to host it somewhere. Can anyone recommend where such a place might be found? (few several beginner questions will follow now) Also, (at this point I might mention that I chose DokuWiki because of it "just works" attitude and because I didn't want to learn server adminstration and the like ...) I'm interested, how much are Wiki systems "compatible"? What I mean under compatible? As far as I understood DokuWiki saves data as text files. If I were to wish to convert it to some other Wiki system would it be possible? Or some other format more suitable for printing (at some point it will be necessary to convert a lot of documentation to a manual format for users). All advices and constructive approaches to this appreciated.

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• embed file in Excel cell

  - by Crash893

  I'm working on a simple "DB" for some people at work and I don't want to do anything fancy. the fields should be something like name , number , notes , File:resume, notes (where file:notes is the acutall embedded resume. I cant see any obvious way to do this but i thought i would ask just the same. Is there a way to take a (pdf , doc , docx , txt) and throw it into a cell so a user can click on it and it will open the file in the approate program note: this db is going to be floating around between multiple sites so linking won't work.

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• How can I create (or do I even need to create) an alias of a DNS MX record?

  - by AKWF

  I am in the process of moving my DNS records from Network Solutions to the Amazon Route 53 service. While I know and understand a little about the basic kinds of records, I am stumped on how to create the record that will point to the MX record on Network Solutions (if I'm even saying that right). On Network Solutions I have this: Mail Servers (MX Records) Note: Mail Servers are listed in rank order myapp.net Add Sub-Domain MXMailServer(Preference) TTL inbound.myapp.net.netsolmail.net.(10) 7200 Network Solutions E-mail I have read that the payload for an MX record state that it must point to an existing A record in the DNS. Yet in the example above, that inbound.myapp... record only has the words "Network Solutions E-mail" next to it. Our email is hosted at Network Solutions. I have already created the CNAME records that look like this: mail.myapp.net 7200 mail.mycarparts.net.netsolmail.net. smtp.myapp.net 7100 smtp.mycarparts.net.netsolmail.net. Since I am only using Amazon as the DNS, do I even need to do anything with that MX record? I appreciate your help, I googled and researched this before I posted, this is my first post on webmasters although I've been on SO for a few years.

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• Is meta description still relevant?

  - by Jeff Atwood

  I received this bit of advice about the meta description tag recently: Meta descriptions are used by Google probably 80% of the time for the snippet. They don’t help with rankings but you should probably use them. You could just auto generate them from the first part of the question. The description tag exists in the header, like so: <meta name="Description" content="A brief summary of the content on the page."> I'm not sure why we would need this field, as Google seems perfectly capable of showing the relevant search terms in context in the search result pages, like so (I searched for c# list performance): In other words, where would a meta description summary improve these results? We want the page to show context around the actual search hits, not a random summary we inserted! Google Webmaster Central has this advice: For some sites, like news media sources, generating an accurate and unique description for each page is easy: since each article is hand-written, it takes minimal effort to also add a one-sentence description. For larger database-driven sites, like product aggregators, hand-written descriptions are more difficult. In the latter case, though, programmatic generation of the descriptions can be appropriate and is encouraged -- just make sure that your descriptions are not "spammy." Good descriptions are human-readable and diverse, as we talked about in the first point above. The page-specific data we mentioned in the second point is a good candidate for programmatic generation. I'm struggling to think of any scenario when I would want the Google-generated summary, that is, actual context from the page for the search terms, to be replaced by a hard-coded meta description summary of the question itself.

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• Wired network on computer to wifi

  - by user329592

  I just got myself a wifi capable cell phone, but I dont have a wireless internet at home. I do have a wired unlimited internet connection on my computer, and I wonder whether there is any gadget that I can plug into my computer (maybe at the usb port?) with which I can turn my computer into a wifi access point? I mean, a dongle or something which will enable me to connect my phone to my computer's internet through wi-fi? Also, I dont know anything about networking, so would it be hard for me to set up a secure wifi point? Thank you for reading this question through. Hope I can buy some sort of adapter which is comparitively cheap.

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• links for 2011-03-04

  - by Bob Rhubart

  Joao Oliveira: Forms and Reports 11g Fusion Startup Script "After Fusion Middleware 11g Linux installation (Weblogic, Forms, Reports, Discoverer and Portal or others) probably most of the newcomers will wonder how to create a startup script to start the Weblogic managed Servers when the server starts up or reboots." (tags: oracle fusionmiddleware weblogic) Anthony Shorten: SOA Suite Integration: Part 3: Loading files Anthony says: "One of the most common scenarios in SOA Integration is the loading of a file into the product from an external source. In Oracle SOA Suite there is a File Adapter that can process many file types into your BPEL process." (tags: oracle otn soa soasuite) Francisco Munoz Alvarez: Playing with Oracle 11gR2, OEL 5.6 and VirtualBox 4.0.2 (1st Part) Oracle ACE Francisco Munoz Alvarez kicks off a tutorial on creating an Oracle Database 11gR2 instance using Oracle VirtualBox and OEL. (tags: oracle database virtualbox virtualization) ORACLENERD: VirtualBox and Shared Folders Oracle ACE Chet Justice shares some tips. (tags: oracle otn oracleace virtualization virtualbox) Chris Muir: Check out the ADF content at this year's ODTUG KScope11 conference Oracle ACE Director Chris Muir shares information on this year's ODTUD Kaleidoscope event in Long Beach, CA, June 26-30. (tags: oracle otn oracleace odtug adf) Edwin Biemond: Setting a virtual IP on a specific Network interface with WebLogic 10.3.4 PS3 Edwin says: "If you want High Availability in WebLogic you need to enable the WebLogic server migration, configure the nodemanager, use a virtual / floating IP in your managed servers and channels." (tags: oracle otn oracleace highavailability weblogic virtualization) Markus Eisele: High Performance JPA with GlassFish and Coherence - Part 3 Markus says: "In this third part of my four part series I'll explain strategy number two of using Coherence with EclipseLink and GlassFish. This is all about using Coherence as Second Level Cache (L2) with EclipseLink." (tags: oracle otn oracleace glassfish coherence) Michel Schildmeijer: Set Oracle ESB montoring with Enterprise Manager Grid Control "Monitoring your Oracle SOA Suite environment...can be very complicated, but if you are using Grid Control, Oracle provides you the SOA Management Pack. Unfortunately this SOA Management Pack has pretty detailed OOTB info about BPEL, but for ESB you won’t find any OOTB metrics." (tags: oracle otn soa grid servicebus)

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• Are Get-Set methods a violation of Encapsulation?

  - by Dipan Mehta

  In an Object oriented framework, one believes there must be strict encapsulation. Hence, internal variables are not to be exposed to outside applications. But in many codebases, we see tons of get/set methods which essentially open a formal window to modify internal variables that were originally intended to be strictly prohibited. Isn't it a clear violation of encapsulation? How broadly such a practice is seen and what to do about it? EDIT: I have seen some discussions where there are two opinions in extreme: on one hand people believe that because get/set interface is used to modify any parameter, it does qualifies not be violating encapsulation. On the other hand, there are people who believe it is does violate. Here is my point. Take a case of UDP server, with methods - get_URL(), set_URL(). The URL (to listen to) property is quite a parameter that application needs to be supplied and modified. However, in the same case, if the property like get_byte_buffer_length() and set_byte_buffer_length(), clearly points to values which are quite internal. Won't it imply that it does violate the encapsulation? In fact, even get_byte_buffer_length() which otherwise doesn't modify the object, still misses the point of encapsulation, because, certainly there is an App which knows i have an internal buffer! Tomorrow, if the internal buffer is replaced by something like a *packet_list* the method goes dysfunctional. Is there a universal yes/no towards get set method? Is there any strong guideline that tell programmers (specially the junior ones) as to when does it violate encapsulation and when does it not?

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• Extreme Optimization – Curves (Function Mapping) Part 1

  - by JoshReuben

  Overview ·        a curve is a functional map relationship between two factors (i.e. a function - However, the word function is a reserved word). ·        You can use the EO API to create common types of functions, find zeroes and calculate derivatives - currently supports constants, lines, quadratic curves, polynomials and Chebyshev approximations. ·        A function basis is a set of functions that can be combined to form a particular class of functions.   The Curve class ·        the abstract base class from which all other curve classes are derived – it provides the following methods: ·        ValueAt(Double) - evaluates the curve at a specific point. ·        SlopeAt(Double) - evaluates the derivative ·        Integral(Double, Double) - evaluates the definite integral over a specified interval. ·        TangentAt(Double) - returns a Line curve that is the tangent to the curve at a specific point. ·        FindRoots() - attempts to find all the roots or zeroes of the curve. ·        A particular type of curve is defined by a Parameters property, of type ParameterCollection   The GeneralCurve class ·        defines a curve whose value and, optionally, derivative and integrals, are calculated using arbitrary methods. A general curve has no parameters. ·        Constructor params:  RealFunction delegates – 1 for the function, and optionally another 2 for the derivative and integral ·        If no derivative  or integral function is supplied, they are calculated via the NumericalDifferentiation  and AdaptiveIntegrator classes in the Extreme.Mathematics.Calculus namespace. // the function is 1/(1+x^2) private double f(double x) {     return 1 / (1 + x*x); }   // Its derivative is -2x/(1+x^2)^2 private double df(double x) {     double y = 1 + x*x;     return -2*x* / (y*y); }   // The integral of f is Arctan(x), which is available from the Math class. var c1 = new GeneralCurve (new RealFunction(f), new RealFunction(df), new RealFunction(System.Math.Atan)); // Find the tangent to this curve at x=1 (the Line class is derived from Curve) Line l1 = c1.TangentAt(1);

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• Ubuntu: The Movie

  - by CYREX

  Since Ubuntu is the most popular distribution and has made a lot of changes in many places around the globe and in different industries up to the point where even people that do not know what Linux is, they know what Ubuntu is (go figure? ) there might be a movie coming someday (like the social network for Facebook or Revolution OS for Linux/Red Hat) i wanted to know how it all came to be from the actual players in the show. UBUNTU: The Movie Since i have seen several of the primary characters of the movie here, this might be a good place to start on how it all came to be. Not in the traditional wikipedia way or the ubuntu help section, but in the what the actual developers have in mind on how it all went down to the point of having a huge amount of users, an incredible level sophistication in the forum, help sections, installers, etc.. This is just to have the KNOW HOW before the actual movie makes it out some day in the future. As a fan of Ubuntu this is a MOST KNOW! ;) Hope i made some people happy and some other shy hehe.

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• What causes bad performance in consumer apps?

  - by Crashworks

  My Comcast DVR takes at least three seconds to respond to every remote control keypress, making the simple task of watching television into a frustrating button-mashing experience. My iPhone takes at least fifteen seconds to display text messages and crashes ¼ of the times I try to bring up the iPad app; simply receiving and reading an email often takes well over a minute. Even the navcom in my car has mushy and unresponsive controls, often swallowing successive inputs if I make them less than a few seconds apart. These are all fixed-hardware end-consumer appliances for which usability should be paramount, and yet they all fail at basic responsiveness and latency. Their software is just too slow. What's behind this? Is it a technical problem, or a social one? Who or what is responsible? Is it because these were all written in managed, garbage-collected languages rather than native code? Is it the individual programmers who wrote the software for these devices? In all of these cases the app developers knew exactly what hardware platform they were targeting and what its capabilities were; did they not take it into account? Is it the guy who goes around repeating "optimization is the root of all evil," did he lead them astray? Was it a mentality of "oh it's just an additional 100ms" each time until all those milliseconds add up to minutes? Is it my fault, for having bought these products in the first place? This is a subjective question, with no single answer, but I'm often frustrated to see so many answers here saying "oh, don't worry about code speed, performance doesn't matter" when clearly at some point it does matter for the end-user who gets stuck with a slow, unresponsive, awful experience. So, at what point did things go wrong for these products? What can we as programmers do to avoid inflicting this pain on our own customers?

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• What to think about when designing a simple GUI for a quiz game

  - by PeterK

  I am coming close to finish my first iPhone game ever, as a matter of fact also my first programming experience ever, which is a quiz game. I have all the functionality i want and is currently polishing it both from a code point of view as well as looking at the GUI. My initial idea was not to use any specific graphics but rather focus on the game experience and simplicity and by that only using background color, orange, and white text as well as buttons. The design is based on that all ages, from learning to read, should be able to host and play this game. However, as i am now getting close to the finish line i am starting to think what is needed from a GUI point of view. I would like to ask for some advice what to think about when designing a GUI. Is it considered OK without any 'fancy' graphics, what is the risk without it etc.? Also, what colors goes well together if i choose to use a simple GUI. I am thinking about color blindness etc. In other words how do i design a good and effective GUI for a simple game as mine? Thanks

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• nameservers one domain one VPS and one VMCloud

  - by Dave

  I 'had' just a single VPS with nameservers ns1 & ns2.mydomain.com. I've now taken a VMCloud package as I need space etc. Ultimately I will carefully transfer all accounts from my VPS to Cloud but in the short term I'm running both. In the new WHM on Cloud I have set hostname bla.domian nameservers as ns3 & ns4.mydomain.com with the two new ip addresses. Question is do I need to do anything else - eg where mydomain.com is registered? I want ns1 & 2 point to VPS and ns3 & 4 to point to Cloud.

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• Perl not working with Nginx via fastcgi, cannot decipher error logs

  - by ProfessionalAmateur

  Im running CentOS 6.2, Nginx 1.2.3 following these Linode Instructions to get Perl to work with Nginx I've done everything upto the point of testing an actual Perl file. When I do this the browser says: The page you are looking for is temporarily unavailable. Please try again later. And my Nginx error-log shows the following: 2012/09/02 22:09:58 [error] 20772#0: *1 connect() failed (111: Connection refused) while connecting to upstream, client: 192.168.1.102, server: localhost, request: "GET / HTTP/1.1", upstream: "fastcgi://127.0.0.1:8999", host: "192.168.1.10:81" Im stuck at this point. Im not sure if it matters but I also have spawn-fcgi and php-fpm to serve up PHP files on this site, but that should be 100% seperate from the perl-fastcgi setup, different port, etc.. How can I troubleshoot this?

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• Asus Eee PC 1000HE wireless woes

  - by Vladimir Noobokov

  Ever since I have upgraded my Asus Eee PC 1000HE from Lucid 10.04 to Precise 12.04 I have been having issues with my wireless connections. At first I had wireless dropouts: I would be able to start using wireless, but then after a few minutes the wireless would stop working even though I was still connected to the network. Lately things turned worse: while I connect to my wireless network, it just never works. I tried all sorts of solutions on offer here and in other forums but none worked. At best I got the wireless to work up until I rebooted, at which point I would get the same symptoms again: the wireless network is there, but it's not really working. By now I tried so many different "solutions" I don't know where to start describing them; I have also reinstalled 12.04 several times, enough to make me lose faith in Ubuntu. Help here looks like my last resort. For the record, my Asus Eee PC 1000HE is equipped with an Atheros wireless card. I have reinstalled 12.04, ran all the suggested updates, and receive the following response when I type iwconfig in the terminal: lo no wireless extensions. wlan0 IEEE 802.11bgn ESSID:"Arsenal" Mode:Managed Frequency:2.452 GHz Access Point: 00:04:ED:48:67:89 Bit Rate=1 Mb/s Tx-Power=16 dBm Retry long limit:7 RTS thr:off Fragment thr:off Power Management:off Link Quality=70/70 Signal level=-29 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:27 Invalid misc:57 Missed beacon:0 eth0 no wireless extensions. Thanks in advance for any help that might be offered.

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• Problem installing Ubuntu 10.04 64 bit side by side with Vista by using a bootable USB drive. What n

  - by Adam Siddhi

  What happened I decided to install Ubuntu 10.04 64 bit side by side with Vista Home Premium (I guess on another partition) with a USB stick. I found instructions on how to do this here: https://help.ubuntu.com/community/Installation/FromUSBStick To create the bootable USB drive I had to download a program called Unetbootin. That process was simple enough. All I had to do was just choose the disk image option, select the ubuntu-10.04-desktop-amd64.iso image, make sure it recognizes my USB drive and then press OK. It takes only like a few minutes to create a working bootable USB drive. Then I have to restart my computer, enter the BIOS, select my USB drive as the first boot drive, save options and continue with booting up. After this Ubuntu actually loads up. I think this is known as the Live version of Ubuntu so you can try it out before fully installing it. Any ways, on the Ubuntu 10.04 desktop I saw an installer. I click it and begin the installation process. Just so you know, I tried installing it 2 times. I will explain what happened each time: The first time I tried installing Ubuntu 10.04 I got stuck at step 4 of 7. I remember selecting the last option in the window which was Specify Partitions Manually (Advanced) I made my partition for Ubuntu like 52 gigs. I clicked forward and a little pop up window appeared saying Please Wait. So the installation process stalled on this window so I closed out of it and quit the installation process. So at this point I was worried because I had already selected the partition size and assumed it started making it. Since it stalled I had to quit out though. Anyways, once again I reached step 4 of 7 a decided to select the first option which is Install them side by side choosing between them each startup. I figured this was the safe way to go. I did that and the pop up window saying Please Wait popped up again but lasted only like 10 seconds. Then I got to I guess step 6 where it asks you to enter your desired name and password. Did that and clicked forward. The Ubuntu 10.04 installation load screen appeared and the loading bar at the bottom started filling up. So I got to 83% and stalled during the Importing other profile information (I think it was called this. I had the option to do this during I think step 6) process. So at this point I decided to get stop the installation process. I was getting very nervous. I tried to restart the computer but all that happened was that Ubuntu restarted. I finally got the computer to restart. I was pretty sure I had screwed something up big time by this point. As my computer was restarting I entered BIOS again and switched back to it booting from my main hard drive containing Vista. Saved it and continued the boot process. My worst fears were confirmed as Vista would not boot up. I mean I saw the little Microsoft Windows choppy animated green loading bar at the bottom of the screen and then boom! It decided to restart. When it restarted I had the option to run a memory test check to see if there was anything that needed to be repaired. That took like 20 minutes and at the end I saw that I did indeed have to repair something. I had to go through 2 repair processes. After each I had to restart the computer. The 2nd time it went through the repair process it said that it could not fully repair the damage. I was scared and restarted but Vista did load up. I got to my desktop and saw a message saying something like Repairs have been made, Please restart for changes to take effect I noticed that some Notification icons were missing and I could not hear volume in a video. Things were a bit funky. So I did restart and here I am. Now what?! So since I got back into Vista and thankfully have a working Internet connection I am trying to find answers to my problem (that is why I am writing this post). I am scared that I have partioned my hard drive 2 times after researching Installing Ubuntu 10.04 and seeing this post http://techie-buzz.com/foss/ubuntu-10-04-lts-installation-guide.html The author shows screen shots of installing Ubuntu 10.04. He shows the image of step 4 of 7 with a caption at the bottom. I will recreate it below: Select a partitioning option. Unless you want to format all the hard drive and install Ubuntu afresh, select the last option and proceed. Questions If I have indeed partitioned my HD 2 times (which I am sure it is), how do I get to a point where I can see all my bad, unfinished Ubuntu partitions and get rid of them? How do I clean this big mess up? & How can I ensure that this mess will not happen next time I try installing Ubuntu 10.04? Thank you Adam

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• Rails/Node.js interaction

  - by lpvn

  I and my co-worker are developing a web application with rails and node.js and we can't reach a consensus regarding a particular architectural decision. Our setup is basically a rails server working with node.js and redis, when a client makes a http request to our rails API in some cases our rails application posts the response to a redis database and then node.js transmits the response via websocket. Our disagreement occurs in the following point: my co-worker thinks that using node.js to send data to clients is somewhat business logic and should be inside the model, so in the first code he wrote he used commands of broadcast in callbacks and other places of the model, he's convinced that the models are the best place for the interaction between rails and node. I on the other hand think that using node.js belongs to the runtime realm, my take is that the broadcast commands and other node.js interactions should be in the controller and should only be used in a model if passed through a well defined interface, just like the situation when a model needs to access the current user of a session. At this point we're tired of arguing over this same thing and our discussion consists in us repeating to ourselves our same opinions over and over. Could anyone, preferably with experience in the same setup, give us an unambiguous response saying which solution is more adequate and why it is?

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• Connect to internet through DC with 2 network interfaces

  - by Ali Foroughi

  I have a network like this : Client 1 <== Wireless ==> Access Point <== Wire ==> DC <== Wireless ==> ADSL Modem Client 1 : IP : 192.168.1.181 DG : 192.168.1.100 DNS : 192.168.1.100 Access Point : IP : 192.168.1.10 DG : 192.168.1.100 DC : IP : 192.168.1.100 DG : 192.168.1.1 DNS : 127.0.0.1 ADSL Modem : IP : 192.168.1.1 I can ping yahoo.com from client1, but cannot browse the internet. UPDATE1 : my DC has two network interfaces that I bridge together. UPDATE2 : I powered down the DC firewall UPDATE3 : I set a forwarder for my DC to 8.8.8.8 (Google dns)

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• What is the best way to configure Apache or AWS to support a Rails multi tenancy application that allows each customer to have their own domain name?

  - by Ryan Arneson

  I'm building a Rails 3 SaaS site that allows for multi-tenancy. When a customer signs up they put in their own domain name, e.g. example.com. I need example.com to point to my SaaS application and serve them their content. My questions are as follows: Do I need to create an Apache vhost for each customer using their own domain? Is there an easier way with CNAME's to just have the customer point to the IP address of my server(s) that then forwards the request onto my application through some catch all vhost? Would I be able to create the CNAME record for the customer so they don't have to do any setup? Would this be a case better suited to Amazon Web Services? Any help or explanation or corrections on my understanding of dns would be appreciated. I'm a developer so the server ops portion of this is a bit cloudy.

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• Domain connection shows as "unauthenticated"

  - by gareth89

  I have seen various different questions for this problem floating around but either the circumstances arent the same or the solution doesnt work so thought i would post it to see if anybody has any suggestions. Various domain PCs and laptops appear to randomly give the connection name of "lewis.local 2(Unauthenticated)" - lewis.local being our domain - and provides an exclamation mark where the network type logo is normally shown. This also appears to happen every time connecting via vpn. Our setup is: 2 servers both running windows server 2003 R2 (x32) main server has AD, DNS and DHCP installed IPv4 on approx 30 client machines (some wired, some wireless) If anybody has any thoughts on solutions i would appreciate it. I have tried removing all but AD server roles, resetting all of the systems and nothing. It doesnt prevent anything from working just like a domain connection most of the time however it is getting fustrating! Also dont know if it could have anything to do with it but the DHCP server seems to have quite a long lead time on issuing the IP address to the client.

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