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  • Is there a canonical source supporting "all-surrogates"?

    - by user61852
    Background The "all-PK-must-be-surrogates" approach is not present in Codd's Relational Model or any SQL Standard (ANSI, ISO or other). Canonical books seems to elude this restrictions too. Oracle's own data dictionary scheme uses natural keys in some tables and surrogate keys in other tables. I mention this because these people must know a thing or two about RDBMS design. PPDM (Professional Petroleum Data Management Association) recommend the same canonical books do: Use surrogate keys as primary keys when: There are no natural or business keys Natural or business keys are bad ( change often ) The value of natural or business key is not known at the time of inserting record Multicolumn natural keys ( usually several FK ) exceed three columns, which makes joins too verbose. Also I have not found canonical source that says natural keys need to be immutable. All I find is that they need to be very estable, i.e need to be changed only in very rare ocassions, if ever. I mention PPDM because these people must know a thing or two about RDBMS design too. The origins of the "all-surrogates" approach seems to come from recommendations from some ORM frameworks. It's true that the approach allows for rapid database modeling by not having to do much business analysis, but at the expense of maintainability and readability of the SQL code. Much prevision is made for something that may or may not happen in the future ( the natural PK changed so we will have to use the RDBMS cascade update funtionality ) at the expense of day-to-day task like having to join more tables in every query and having to write code for importing data between databases, an otherwise very strightfoward procedure (due to the need to avoid PK colisions and having to create stage/equivalence tables beforehand ). Other argument is that indexes based on integers are faster, but that has to be supported with benchmarks. Obviously, long, varying varchars are not good for PK. But indexes based on short, fix-length varchar are almost as fast as integers. The questions - Is there any canonical source that supports the "all-PK-must-be-surrogates" approach ? - Has Codd's relational model been superceded by a newer relational model ?

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  • "The daemon is being inhibited" error message when mounting volumes on a partitioned external HD [closed]

    - by Todd
    I'm having a great deal of difficulty with an external hard drive. I'm currently running a dual boot system (XP Service Pack 3 and Ubuntu 11.04 Natty Narwahl) on a Dell Inspiron B120. I'm trying to set up a new 80 GB Hitachi external HD. Using GParted, I formatted the drive and set up the partitions. The partitioning scheme is as follows 10GB NTFS Primary, 2GB Linux-Swap Primary, 50GB FAT32 Primary, 12GB Unallocated. After applying those changes, I went into Disk Utility and the HD appears along with the correct partitions. When I try to mount the volumes for partitions 1 and 3, I get a pop-up stating: Error Mounting Volume An error occurred while performing an operation on "Home" (Partition 3 of HTS548080m9AT00): The daemon is being inhibited. When I try to to check the filesystem I get a pop-up stating: Error Checking filesystem on volume An error occurred while performing an operation on "Home" (Partition 3 of HTS548080m9AT00): The daemon is being inhibited. Throughout the time that I'm attempting to troubleshoot the problem, the external drive light is on and blinking. With my frustration hitting a boiling point, I try to shut down the drive and remove it so that I can plug in a different external HD that works PERFECTLY. However, when I try to shut down and safely remove the drive, I get a pop-up stating: Error Detaching Drive An error occurred while performing an operation on "80GB Hard Disk" (HTS548080m9AT00): The daemon is being inhibited. Can anyone tell me what I'm doing wrong? I'm a newbie and not that skilled with terminal commands, so please dumb it down for me if you request specific command output.

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  • Search ranking for important keywords has gone down drastically [duplicate]

    - by Vaivhav
    This question already has an answer here: How to diagnose a search engine ranking drop? 5 answers Firstly, we are a small entrepreneurial team of 3 persons and I am more like an amateur webmaster of the company's website as we cannot really afford a technical guy/department right now. A few weeks earlier, our website traffic and rankings for most keywords decreased overnight. I did a lot of reading henceforth and learned about Penguin 2.1 which people said is the reason for the drop. Something like this had never happened before. Now, I have gone through the entire Google webmaster help section. It says there that if a manual penalty is taken against us, we would notice a message in Manual Actions page. So far, we haven't received any notice from Google for web spam. Some SEO guys I contacted said they found spam links in our backlink profile. I do believe I had mistakenly purchased a cheap link/SEO scheme when I was yet very new to SEO. This was more than a year back but since then we have been legitimate. Moreover, how do I find out which is a spam link and which is not? Our content is all original, refreshing and the best you will find in our niche. We also have a blog but on a different domain (wordpress.com) from where we send out anchored links to our business website. Is this a good thing to do? Now, how should we proceed and recover our traffic/rankings. I tried searching in webmasters for a way to reach google and ask them why the traffic has decreased suddenly, but I couldn't find a contact form or something. Can someone please go through our website and help in making things more clear regarding the reason for the drop, along with a solution. Will really appreciate this as I can't get to figure this out and its taking a lot of time. Vaivhav

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  • Reference Data Management

    - by rahulkamath
    Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} table.MsoTableColorfulListAccent2 {mso-style-name:"Colorful List - Accent 2"; mso-tstyle-rowband-size:1; mso-tstyle-colband-size:1; mso-style-priority:72; mso-style-unhide:no; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-tstyle-shading:#F8EDED; mso-tstyle-shading-themecolor:accent2; mso-tstyle-shading-themetint:25; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Calibri","sans-serif"; color:black; mso-themecolor:text1;} table.MsoTableColorfulListAccent2FirstRow {mso-style-name:"Colorful List - Accent 2"; mso-table-condition:first-row; mso-style-priority:72; mso-style-unhide:no; mso-tstyle-shading:#9E3A38; mso-tstyle-shading-themecolor:accent2; mso-tstyle-shading-themeshade:204; mso-tstyle-border-bottom:1.5pt solid white; mso-tstyle-border-bottom-themecolor:background1; color:white; mso-themecolor:background1; mso-ansi-font-weight:bold; mso-bidi-font-weight:bold;} table.MsoTableColorfulListAccent2LastRow {mso-style-name:"Colorful List - Accent 2"; mso-table-condition:last-row; mso-style-priority:72; mso-style-unhide:no; mso-tstyle-shading:white; mso-tstyle-shading-themecolor:background1; mso-tstyle-border-top:1.5pt solid black; mso-tstyle-border-top-themecolor:text1; color:#9E3A38; mso-themecolor:accent2; mso-themeshade:204; mso-ansi-font-weight:bold; mso-bidi-font-weight:bold;} table.MsoTableColorfulListAccent2FirstCol {mso-style-name:"Colorful List - Accent 2"; mso-table-condition:first-column; mso-style-priority:72; mso-style-unhide:no; mso-ansi-font-weight:bold; mso-bidi-font-weight:bold;} table.MsoTableColorfulListAccent2LastCol {mso-style-name:"Colorful List - Accent 2"; mso-table-condition:last-column; mso-style-priority:72; mso-style-unhide:no; mso-ansi-font-weight:bold; mso-bidi-font-weight:bold;} table.MsoTableColorfulListAccent2OddColumn {mso-style-name:"Colorful List - Accent 2"; mso-table-condition:odd-column; mso-style-priority:72; mso-style-unhide:no; mso-tstyle-shading:#EFD3D2; mso-tstyle-shading-themecolor:accent2; mso-tstyle-shading-themetint:63; mso-tstyle-border-top:cell-none; mso-tstyle-border-left:cell-none; mso-tstyle-border-bottom:cell-none; mso-tstyle-border-right:cell-none; mso-tstyle-border-insideh:cell-none; mso-tstyle-border-insidev:cell-none;} table.MsoTableColorfulListAccent2OddRow {mso-style-name:"Colorful List - Accent 2"; mso-table-condition:odd-row; mso-style-priority:72; mso-style-unhide:no; mso-tstyle-shading:#F2DBDB; mso-tstyle-shading-themecolor:accent2; mso-tstyle-shading-themetint:51;} Reference Data Management Oracle Data Relationship Management (DRM) has always been extremely powerful as an Enterprise MDM solution that can help manage changes to master data in a way that influences enterprise structure, whether it be mastering chart of accounts to enable financial transformation, or revamping organization structures to drive business transformation and operational efficiencies, or mastering sales territories in light of rapid fire acquisitions that require frequent sales territory refinement, equitable distribution of leads and accounts to salespersons, and alignment of budget/forecast with results to optimize sales coverage. Increasingly, DRM is also being utilized by Oracle customers for reference data management, an emerging solution space that deserves some explanation. What is reference data? Reference data is a close cousin of master data. While master data may be more rapidly changing, requires consensus building across stakeholders and lends structure to business transactions, reference data is simpler, more slowly changing, but has semantic content that is used to categorize or group other information assets – including master data – and give them contextual value. The following table contains an illustrative list of examples of reference data by type. Reference data types may include types and codes, business taxonomies, complex relationships & cross-domain mappings or standards. Types & Codes Taxonomies Relationships / Mappings Standards Transaction Codes Industry Classification Categories and Codes, e.g., North America Industry Classification System (NAICS) Product / Segment; Product / Geo Calendars (e.g., Gregorian, Fiscal, Manufacturing, Retail, ISO8601) Lookup Tables (e.g., Gender, Marital Status, etc.) Product Categories City à State à Postal Codes Currency Codes (e.g., ISO) Status Codes Sales Territories (e.g., Geo, Industry Verticals, Named Accounts, Federal/State/Local/Defense) Customer / Market Segment; Business Unit / Channel Country Codes (e.g., ISO 3166, UN) Role Codes Market Segments Country Codes / Currency Codes / Financial Accounts Date/Time, Time Zones (e.g., ISO 8601) Domain Values Universal Standard Products and Services Classification (UNSPSC), eCl@ss International Classification of Diseases (ICD) e.g., ICD9 à IC10 mappings Tax Rates Why manage reference data? Reference data carries contextual value and meaning and therefore its use can drive business logic that helps execute a business process, create a desired application behavior or provide meaningful segmentation to analyze transaction data. Further, mapping reference data often requires human judgment. Sample Use Cases of Reference Data Management Healthcare: Diagnostic Codes The reference data challenges in the healthcare industry offer a case in point. Part of being HIPAA compliant requires medical practitioners to transition diagnosis codes from ICD-9 to ICD-10, a medical coding scheme used to classify diseases, signs and symptoms, causes, etc. The transition to ICD-10 has a significant impact on business processes, procedures, contracts, and IT systems. Since both code sets ICD-9 and ICD-10 offer diagnosis codes of very different levels of granularity, human judgment is required to map ICD-9 codes to ICD-10. The process requires collaboration and consensus building among stakeholders much in the same way as does master data management. Moreover, to build reports to understand utilization, frequency and quality of diagnoses, medical practitioners may need to “cross-walk” mappings -- either forward to ICD-10 or backwards to ICD-9 depending upon the reporting time horizon. Spend Management: Product, Service & Supplier Codes Similarly, as an enterprise looks to rationalize suppliers and leverage their spend, conforming supplier codes, as well as product and service codes requires supporting multiple classification schemes that may include industry standards (e.g., UNSPSC, eCl@ss) or enterprise taxonomies. Aberdeen Group estimates that 90% of companies rely on spreadsheets and manual reviews to aggregate, classify and analyze spend data, and that data management activities account for 12-15% of the sourcing cycle and consume 30-50% of a commodity manager’s time. Creating a common map across the extended enterprise to rationalize codes across procurement, accounts payable, general ledger, credit card, procurement card (P-card) as well as ACH and bank systems can cut sourcing costs, improve compliance, lower inventory stock, and free up talent to focus on value added tasks. Specialty Finance: Point of Sales Transaction Codes and Product Codes In the specialty finance industry, enterprises are confronted with usury laws – governed at the state and local level – that regulate financial product innovation as it relates to consumer loans, check cashing and pawn lending. To comply, it is important to demonstrate that transactions booked at the point of sale are posted against valid product codes that were on offer at the time of booking the sale. Since new products are being released at a steady stream, it is important to ensure timely and accurate mapping of point-of-sale transaction codes with the appropriate product and GL codes to comply with the changing regulations. Multi-National Companies: Industry Classification Schemes As companies grow and expand across geographies, a typical challenge they encounter with reference data represents reconciling various versions of industry classification schemes in use across nations. While the United States, Mexico and Canada conform to the North American Industry Classification System (NAICS) standard, European Union countries choose different variants of the NACE industry classification scheme. Multi-national companies must manage the individual national NACE schemes and reconcile the differences across countries. Enterprises must invest in a reference data change management application to address the challenge of distributing reference data changes to downstream applications and assess which applications were impacted by a given change.

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  • ADF Faces Skin Editor - How to Work with It

    - by Shay Shmeltzer
    The ODTUG Kscop11 conference was a great success with lots of sessions about FMW running in a special track. I did several sessions and labs in the conference, and I thought it might be a good idea to at least give you a taste of what you might have missed. So here is most of what I demoed in my ADF Faces Skinning session (not all though - that session was 60 minutes long, and while everyone did end up going out of the building in the middle because of a fire drill for about 5 minutes, there was other things covered in the session as well). In the demo here you'll see how to generate new images and default color scheme, how to identify a component class with Firebug, how to skin a component, how to identify the global selector of a property, how to change fonts and how to change strings. By the way, for more on ADF Skinning you should also listen to the ADF Insider seminar that Frank Nimphius recorded on skinning, it will give you better understanding of the overall skinning process. P.S. in the demo I add an entry to the web.xml file which prevent ADF Faces from compressing the HTML that is generated. The entry is for org.apache.myfaces.trinidad.DISABLE_CONTENT_COMPRESSION  and I set it to true. This is very useful when you work on creating the skin, but don't forget to un-set it before you go production.

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  • How to perform game object smoothing in multiplayer games

    - by spaceOwl
    We're developing an infrastructure to support multiplayer games for our game engine. In simple terms, each client (player) engine sends some pieces of data regarding the relevant game objects at a given time interval. On the receiving end, we step the incoming data to current time (to compensate for latency), followed by a smoothing step (which is the subject of this question). I was wondering how smoothing should be performed ? Currently the algorithm is similar to this: Receive incoming state for an object (position, velocity, acceleration, rotation, custom data like visual properties, etc). Calculate a diff between local object position and the position we have after previous prediction steps. If diff doesn't exceed some threshold value, start a smoothing step: Mark the object's CURRENT POSITION and the TARGET POSITION. Linear interpolate between these values for 0.3 seconds. I wonder if this scheme is any good, or if there is any other common implementation or algorithm that should be used? (For example - should i only smooth out the position? or other values, such as speed, etc) any help will be appreciated.

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  • Restore Default Appearance in Ubuntu 12.04

    - by katya sehgal
    I'd like the original colour scheme, icon style of 12.04. I somehow lost the Ambiance theme (possible error or upgrade error). I re-installed 'light-themes' from the terminal and got it back. But the panel on the top that shows the options of sound, battery and wi-fi has changed and I can-not get the original setting back. In the windows, the close, minimize tools have shifted to the right instead of the original left side. I had installed MyUnity and Ubuntu Tweak but deleted them. As such, I want the original setting back. Kindly help me with the commands. I have searched for solutions; there are multiple and I need to be sure if I should follow the same. Kindly bear before marking duplicate. Discoveries *. [The appearance is gray and boxy as outlined here.] Not sure same problem. *. [Similar 'gray and boxy' article here] *. Desktop forgets theme.] *. I have also tried unity --reset command. It never completes. I gave it 20 minutes.

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  • License validation and calling home

    - by VitalyB
    I am developing an application that, when bought, can be activated using a license. Currently I am doing offline validation which is a bit troubling to me. I am aware there is nothing to do against cracks (i.e modified binaries), however, I am thinking to trying to discourage license-key pirating. Here is my current plan: When the user activates the software and after offline validation is successful, it tries to call home and validate the license. If home approves of the license or if home is unreachable, or if the user is offline, the license gets approved. If home is reached and tells the license is invalid, validation fails. Licensed application calls home the same way every time during startup (in background). If license is revoked (i.e pirated license or generated via keygen), the license get deactivated. This should help with piracy of licenses - An invalid license will be disabled and a valid license that was pirated can be revoked (and its legal owner supplied with new license). Pirate-users will be forced to use cracked version which are usually version specific and harder to reach. While it generally sounds good to me, I have some concerns: Users tend to not like home-calling and online validation. Would that kind of validation bother you? Even though in case of offline/failure the application stays licensed? It is clear that the whole scheme can be thwarted by going offline/firewall/etc. I think that the bother to do one of these is great enough to discourage casual license sharing, but I am not sure. As it goes in general with licensing and DRM variations, I am not sure the time I spend on that kind of protection isn't better spent by improving my product. I'd appreciate your input and thoughts. Thanks!

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  • Offshoring: does it ever work?

    - by DanSingerman
    I know there has been a fair amount of discussion on here about outsourcing/offshoring, and the general opinion seems to be that at best it is difficult, and at worst it fails. I have direct experience of offshoring myself; a previous company where I was a dev manager wanted to send some development offshore, and we ran a pilot scheme to see how well it would work. Of course it was a complete failure, although it is not completely clear to me whether this was down to the offshore devs being less talented, the process, or other factors (no doubt it was really a combination). I can see as a business how offshoring looks attractive (much lower day rate), but as far as I can see, the only way it could possibly work is if you do exceptionally detailed design up front, with incredibly detailed specifications; and by the time you have invested in producing that, you have probably spent as nearly as much as if you had written the actual code locally (which I think is an instance of No Silver Bullet) So, what I want to know is, does anyone here have any experience of offshoring actually working ever? Especially if there are any success stories of it working in a semi-agile way? I know there are developers here from all over the World; has anyone worked on an offshore project they consider successful?

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  • cannot boot Ubuntu after fresh install

    - by Jonathan
    I just installed Ubuntu on a Lenovo v570, and cannot boot into the system. All I get is a loop, where some (bios) info is displayed, and then the computer asks me where I would like to boot from. I tried reinstalling, reinstalling with a custom partition scheme, and boot -repair after the install. None of these work. I can see the files on my harddisk have been copied. I have installed many Ubuntus in the past, as well other distros where custom partitioning is required. I don't know where to find any useful information since I don't even get too the grub menu. One odd thing I noticed. The bios now had options to boot USB, OpenSuse,Fedora, or the HD. I am not dual booting. I also realized that the boot info is for a network boot, which means the computer is not recognizing what to boot. It is boot an HD problem, because I can install other OSs just fine. I am completely stumped. I would like to settle this, and end up with a tutorial, that explains to me what happened.

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  • How to schedule time-of-day upgrades

    - by Richard
    Hello, I'm responsible for about 30 Ubuntu computers at a private K-8 school. We have only a 3Mbps internet connection serving the entire campus, and I would like to ensure that updates are done in the middle of the night - so that daytime tasks are not slowed down. I'm using Ubuntu 10.04, and have set all computers to download and install security updates via the update manager. I have also installed cron-apt, and modified the config file to stagger the start times of the upgrades from about 10pm to 4am local time. HOWEVER - this morning I arrived at the school at 7:30am and all the computers were busy downloading a large security based update. Needless to say, all internet activity was slowed to a crawl (for the next 2 hours), and the computer users were very very upset. This was the event I'm trying so hard to prevent. It seems that my scheme to ensure middle of the night downloads failed, and I'm not sure why. I've also tried some schemes using unattended-upgrades & crontab, but there always seemed to be something scheduling upgrades to occur in addition to the ones I try to force at middle of the night. Is there a sure fire way to absolutely positively guarantee that updates will occur only at one specific time? It would be nice if the update manager just had a drop down menu to specify a designated time. Thanks in advance for any help you can give me.

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  • How do I write to an outer truecrypt volume when the inner volume protection prevents writng?

    - by con-f-use
    In a nutshell After some time using the outer volume of a hidden volume in Truecrypt I cannot write to the outer volume anymore. The protection of the inner volume always kicks in before. How do I fix this? Details I'm using truecrypt's two layered encryption of a USB stick. The outer container carries my semi-sensitive stuff while the inner hidden values has a bit more valuable information. I use both, the inner and outer volume regularly and that is part of the problem. Truecrypt can mount the outer volume for writing while protecting the inner. Usually the inner volume, when not protected this way (or mounted read-only) would be indistinguishable from free space. That is of course part of the plausible deniability scheme of truecrypt. At the beginning, everything worked as expected. I could copy and delete data to the outer volume as I pleased. Now it seams that I have written and deleted enough data to have filled the outer volume once. Despite the write protection Ubuntu tries now to write to the continuous "free space" that is the inner volume. It does that although enough other free space is on the outer volume. But on this free space there used to be data so its fragmented and the file system write prefers continuous space. The write on the continuous free space of the outer volume of course fails (with the error message in the picture above) as Truecrypt's inner-volume-protection kicks in. The Question I know this is expected behaviour, but is there a better way to write to the outer volume that does not attempt to write to the hidden free space at the end? The whole question could be more generally rephrased to: How do I control, where on a partition data is written in Ubuntu?

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  • Storing editable site content?

    - by hmp
    We have a Django-based website for which we wanted to make some of the content (text, and business logic such as pricing plans) easily editable in-house, and so we decided to store it outside the codebase. Usually the reason is one of the following: It's something that non-technical people want to edit. One example is copywriting for a website - the programmers prepare a template with text that defaults to "Lorem ipsum...", and the real content is inserted later to the database. It's something that we want to be able to change quickly, without the need to deploy new code (which we currently do twice a week). An example would be features currently available to the customers at different tiers of pricing. Instead of hardcoding these, we read them from database. The described solution is flexible but there are some reasons why I don't like it. Because the content has to be read from the database, there is a performance overhead. We mitigate that by using a caching scheme, but this also adds some complexity to the system. Developers who run the code locally see the system in a significantly different state compared to how it runs on production. Automated tests also exercise the system in a different state. Situations like testing new features on a staging server also get trickier - if the staging server doesn't have a recent copy of the database, it can be unexpectedly different from production. We could mitigate that by committing the new state to the repository occasionally (e.g. by adding data migrations), but it seems like a wrong approach. Is it? Any ideas how best to solve these problems? Is there a better approach for handling the content that I'm overlooking?

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  • Offshoring: does it ever work?

    - by DanSingerman
    I know there has been a fair amount of discussion on here about outsourcing/offshoring, and the general opinion seems to be that at best it is difficult, and at worst it fails. I have direct experience of offshoring myself; a previous company where I was a dev manager wanted to send some development offshore, and we ran a pilot scheme to see how well it would work. Of course it was a complete failure, although it is not completely clear to me whether this was down to the offshore devs being less talented, the process, or other factors (no doubt it was really a combination). I can see as a business how offshoring looks attractive (much lower day rate), but as far as I can see, the only way it could possibly work is if you do exceptionally detailed design up front, with incredibly detailed specifications; and by the time you have invested in producing that, you have probably spent as nearly as much as if you had written the actual code locally (which I think is an instance of No Silver Bullet) So, what I want to know is, does anyone here have any experience of offshoring actually working ever? Especially if there are any success stories of it working in a semi-agile way? I know there are developers here from all over the World; has anyone worked on an offshore project they consider successful?

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  • Software architecture map to aid cross team communication?

    - by locster
    I work in a company where multiple teams each work on different parts of a software product in a vaguely agile/scrum manner. Mostly the organisation works well but there have been instances where a team may make a change without realising its impact on other teams. Where dependence is known communication has been good, and where dependence is suspected then 'broadcast' emails and informal conversations have also worked well. But there exists a sub-set of tasks that fall between the cracks. Broadcast emails are likely not the solution as they would become too numerous such that the email signal/noise ratio would fall. I'm contemplating a solution that involves a sort of map of the software, which details all of the various parts of the system and loosely tries to place interacting and dependent parts near to each other. Each developer then updates their position on the map (today I'm working on X and Y), and therefore if two or more developers happen to be co-located (or proximate) on the map then we can see this each day and this could form the trigger for further discussion on possible overlap and conflict. Is such a method out there and in use? If so what is it and does it work? Otherwise, do you think such a scheme has merit?

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  • Is there a proven concept to website reverse certificate authentication?

    - by Tom
    We're looking at exposing some of our internal application data externally via a website. The actual details of the website aren't that interesting, it'll be built using ASP.NET/IIS etc, that might be relevant. With this, I'm essentially I'm looking for a mechanism to authenticate users viewing my website. This sounds trivial, a username/password is typically fine, but I want more. Now I've read plenty about SSL/x.509 to realise that the CA determines that we're alright, and that the user can trust us. But I want to trust the user, I want the user to be rejected if they don't have the correct credentials. I've seen a system for online banking whereby the bank issues a certificate which gets installed on the users' computer (it was actually smartcard based). If the website can't discover/utilise the key-pair then you are immediately rejected! This is brutal, but necessary. Is there a mechanism where I can do the following: Generate a certificate for a user Issue the certificate for them to install, it can be installed on 1 machine If their certificate is not accessible, they are denied all access A standard username/password scheme is then used after that SSL employed using their certificate once they're "in" This really must already exist, please point me in the right direction! Thanks for your help :)

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  • How do you keep down your urge to learn many things [closed]

    - by devsundar
    One of the difficulties i have is to lower my urge to learn new things (Languages, tools, frameworks etc.). I know it's good to stay the bleeding edge, but at the same time i want to learn things properly. I really see that i need to strike a balance between staying bleeding edge and knowing things properly. For example: Before choosing Arch (Desktop), Ubuntu(Server) and Knoppix(Portable) -- depending on situation -- as favourite distributions. Virtually i have tried all popular linux distributions. You name any popular linux (Redhat, Ubuntu, Arch, Suse, Knoppix, Slax, Slackware) i have tried it for some time. In fact i have spent few years experimenting the operating systems. Before choosing Python, Javascript (nodejs). I have tried all the languages i cameacross Scala, Haskell, Erlang, Ruby, Python, Perl, Scheme. Same applies for database. All popular db RDBMS (Oracle, Mysql, Postgres, SQLite[Favourite] etc) and NoSQL (Mongo, Couch, Neo4j etc.). Advantages i see: We get a overall picture of the technologies/tools/languages. It's useful to select the right tool for the job. We develop a taste and choose the One we like. Disadvantages: I feel that i spend somuch time and see a need to strike a balance. In summary, for e.g. If i see a blog post in HackerNews about CofeeScript i will try it out irrespective of what i am currently learning (Say Haskell). I switch back to learning Haskell, then again i see DART i check it out. And this continues.. Effectively i take more time to learn Haskell, but learnt about other new stuff on the way. The quetion i have is how do you strike a balance between staying bleeding edge and learning properly.

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  • Moving to New Machine... also upgrade to 64bit. What steps?

    - by Kendor
    I am about to move to a new Lenovo X201 from current X61. Current setup has separate \home, separate swap file, also separate \Data partition. Am currently running 10.04 32 bit. Am considering running 64 bit on new machine because I will now have 8 GB of RAM. And would like to also move to 10.10. Ideally I would like preserve as much of my current setup as possible... New machine has Win7 on it, but will blow that away, as I've made a clonezilla copy of it, and will use VirtualBox for when I need Windows. Can someone suggest a good step by step for me? I'm networked to a NAS and also have plenty of external USB storage in case I need intermediary steps. So do I set up new machine first with 64bit 10.10, with partition scheme I want? then rsnyc over \home from old machine (over write target home)? Do I need to upgrade the X61 first to 10.10?

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  • Community TFS Build Manager available for Visual Studio 2012 RC

    - by Jakob Ehn
    I finally got around to push out a version of the Community TFS Build Manager that is compatible with Visual Studio 2012 RC. Unfortunately I had to do this as a separate extension, it references different versions of the TFS assemblies and also some properties and methods that the 2010 version uses are now obsolete in the TFS 2012 API. To download it, just open the Extension Manager, select Online and search for TFS Build:   You can also download it from this link: http://visualstudiogallery.msdn.microsoft.com/cfdb84b4-285e-4eeb-9fa9-dad9bfe2cd10 The functionality is identical to the 2010 version, the only difference is that you can’t start it from the Team Explorer Builds node (since the TE has been completely rewritten and the extension API’s are not yet published). So, to start it you must use the Tools menu: We will continue shipping updates to both versions in the future, as long as it functionality that is compatible with both TFS 2010 and TFS 2012. You might also note that the color scheme used for the build manager doesn’t look as good with the VS2012 theme….   Hope you will enjoy the tool in Visual Studio 2012 as well. I want to thank all the people who have downloaded and used the 2010 version! For feedback, feature requests, bug reports please post this to the CodePlex site: http://tfsbuildextensions.codeplex.com

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  • Release Notes for 5/18/2012

    Here are the notes for this week’s release: Pull Requests We’ve added the ability to see the snippets of code where a user commented inline in the discussion of pull requests. You can also add another line comment directly from the discussion area, rather than navigating to the code diff viewer. Note that there’s currently a known issue where the line associated with the comment isn’t being properly differentiated for existing pull requests (the line in the middle of each diff preview should be bolded). Apologies for the inconvenience! As part of this work, we also took some time to clean up our diff viewer UI to remove the dots and introduce a new color scheme where green is used for added lines. Bug Fixes Fixed an issue affecting the ability to assign pull requests. Fixed an issue where managing various team resources for a project was not working in Chrome or Firefox. Fixed an issue where a project’s RSS subscribe dialog popped up in the wrong place. Fixed an issue where editing wiki anchor links would insert extra characters, resulting in broken links. Fixed an issue where project logos did not display correctly when browsing the site with https in Chrome or Firefox. Fixed an issue where users could encounter errors when deleting remote Git branches. Fixed an issue affecting the ability of fork collaborators to push changes to the fork. Fixed an issue where the advanced work item filters would not persist when navigating through result pages. Fixed an issue where the issue tracker notifications link was not clickable in Chrome. Fixed an issue where pull request comments with line breaks would not be formatted properly when viewing the pull request. Other We upgraded our Git servers to version 1.7.10.1. Have ideas on how to improve CodePlex? Visit our ideas page! Vote for your favorite ideas or submit a new one. Got Twitter? Follow us and keep apprised of the latest releases and service status at @codeplex.

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  • Not able to install LTT tool in 10.04

    - by Ashoka
    I have tried the below commands to install LTT on VMware running Ubuntu 10.04, but got the following error. Please help. From link : https://launchpad.net/~lttng/+archive/ppa $ sudo apt-add-repository ppa:lttng/ppa $ sudo apt-get update $ sudo apt-get install lttng-tools lttng-modules-dkms babeltrace user@usr:~$ sudo apt-add-repository ppa:lttng/ppa Executing: gpg --ignore-time-conflict --no-options --no-default-keyring --secret-keyring /etc/apt/secring.gpg --trustdb-name /etc/apt/trustdb.gpg --keyring /etc/apt/trusted.gpg --primary-keyring /etc/apt/trusted.gpg --keyserver keyserver.ubuntu.com --recv C541B13BD43FA44A287E4161F4A7DFFC33739778 gpg: requesting key 33739778 from hkp server keyserver.ubuntu.com gpg: unable to execute program `/usr/local/libexec/gnupg/gpgkeys_curl': No such file or directory gpg: no handler for keyserver scheme `hkp' gpg: keyserver receive failed: keyserver error user@usr:~$ user@usr:~$ sudo apt-get update ..... $ user@usr:~$ sudo apt-get install lttng-tools lttng-modules-dkms babeltrace Reading package lists... Done Building dependency tree Reading state information... Done E: Couldn't find package lttng-tools user@usr:~$ My systemm details: user@usr:~$ cat /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=10.04 DISTRIB_CODENAME=lucid DISTRIB_DESCRIPTION="Ubuntu 10.04.4 LTS" user@usr:~$ user@usr:~$ user@usr:~$ uname -a Linux usr 2.6.32-42-generic #95-Ubuntu SMP Wed Jul 25 15:57:54 UTC 2012 i686 GNU/Linux user@usr:~$ Regards, Ashoka

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  • What’s New from the Oracle Marketing Cloud at Oracle OpenWorld 2014?

    - by Richard Lefebvre
    Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 Marketing—CX Central is your hub for all things Marketing related at OpenWorld in San Francisco, September 28-October 2, 2014. Learn how to personalize the modern marketing journey to improve customer loyalty. We’re hosting more than 60 breakout sessions, half of which will highlight customer success stories from marquee brands including Bizo, Comcast, Dell, Epson, John Deere, Lane Bryant, ReadyTalk and Shutterfly. Moscone West, Levels 2 and 3 To learn more about how modern marketing works, visit Moscone West, levels 2 and 3, for exciting demos of each of the Oracle Marketing Cloud solutions (BlueKai, Compendium, Eloqua, Push I/O, and Responsys). You also can check out our stations for Vertical Marketing Best Practices, the Markie Awards, and more! CX Spotlight Sessions “Accelerating Big Profits in Big Data,” Jeff Tanner, Baylor University “Using Content Marketing to Impact Every Stage of the Buyer’s Journey,” Jennifer Agustin, Bizo “Expanding Your Marketing with Proven Testing and Optimization,” Brian Border, Shutterfly and Matthew Balthazor, Epson “Modern Marketing: The New Digital Dialogue,” Cory Treffiletti, Oracle A Special Marquee Session Dell’s Hayden Mugford will speak on “The Digital Ecosystem: Driving Experience Through Contact Engagement.” She will highlight how the organization built a digital ecosystem that supports a behaviorally driven, multivehicle nurturing campaign. The Dell 1:1 Global Marketing team worked with multiple partners to innovate integrations with Oracle Eloqua, Oracle Real-Time Decisions for real-time decision logic, and a content management system (CMS) that enables 100 percent customized e-mails. The program doubled average order values for nurtured contacts versus non-nurtured and tripled open and click-through rates versus push e-mail. Other Oracle Marketing Cloud Session Highlights Thought leadership by role Exploring the benefits of moving to the Cloud Product line roadmaps and innovations in Marketing Technical deep dives for product lines within Marketing Best practices and impactful business measurements Solutions that are Integrated across CX Target Audience Session content is geared toward professionals in Marketing, Marketing Operations, Marketing Demand Generation, Social: Chief Marketing Officers, Vice Presidents, Directors and Managers. Outcomes Customers attending Marketing—CX Central @ OpenWorld will be able to: Gain insight into delivering consistent cross-channel marketing Discover how to provide the right information to the right customer at the right time and with the right channel Get answers to burning questions and advice on business challenges Hear from other Oracle customers about recommended best practices to help their organization move forward Network and share ideas to help create a strategy for connecting with customers in better ways It Wouldn’t Be an Oracle Marketing Cloud Event Without a Party! We’re hosting CX Central Fest:  a unique customer experience specifically designed for attendees of CX Central. It will include a chance to rock out at a private concert featuring Los Angeles indie electronic pop group, Capital Cities! Join us Tuesday, September 30 from 7-9 p.m. OpenWorld is a fabulous way for your customers to see all that Oracle Marketing Cloud has to offer. Pass on an invitation today. By Laura Vogel (Oracle) /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}

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  • SharpDX: best practice for multiple RenderForms?

    - by Rob Jellinghaus
    I have an XNA app, but I really need to add multiple render windows, which XNA doesn't do. I'm looking at SharpDX (both for multi-window support and for DX11 / Metro / many other reasons). I decided to hack up the SharpDX DX11 MultiCubeTexture sample to see if I could make it work. My changes are pretty trivial. The original sample had: [STAThread] private static void Main() { var form = new RenderForm("SharpDX - MiniCubeTexture Direct3D11 Sample"); ... I changed this to: struct RenderFormWithActions { internal readonly RenderForm Form; // should just be Action but it's not in System namespace?! internal readonly Action RenderAction; internal readonly Action DisposeAction; internal RenderFormWithActions(RenderForm form, Action renderAction, Action disposeAction) { Form = form; RenderAction = renderAction; DisposeAction = disposeAction; } } [STAThread] private static void Main() { // hackity hack new Thread(new ThreadStart(() = { RenderFormWithActions form1 = CreateRenderForm(); RenderLoop.Run(form1.Form, () = form1.RenderAction(0)); form1.DisposeAction(0); })).Start(); new Thread(new ThreadStart(() = { RenderFormWithActions form2 = CreateRenderForm(); RenderLoop.Run(form2.Form, () = form2.RenderAction(0)); form2.DisposeAction(0); })).Start(); } private static RenderFormWithActions CreateRenderForm() { var form = new RenderForm("SharpDX - MiniCubeTexture Direct3D11 Sample"); ... Basically, I split out all the Main() code into a separate method which creates a RenderForm and two delegates (a render delegate, and a dispose delegate), and bundles them all together into a struct. I call this method twice, each time from a separate, new thread. Then I just have one RenderLoop on each new thread. I was thinking this wouldn't work because of the [STAThread] declaration -- I thought I would need to create the RenderForm on the main (STA) thread, and run only a single RenderLoop on that thread. Fortunately, it seems I was wrong. This works quite well -- if you drag one of the forms around, it stops rendering while being dragged, but starts again when you drop it; and the other form keeps chugging away. My questions are pretty basic: Is this a reasonable approach, or is there some lurking threading issue that might make trouble? My code simply duplicates all the setup code -- it makes a duplicate SwapChain, Device, Texture2D, vertex buffer, everything. I don't have a problem with this level of duplication -- my app is not intensive enough to suffer resource issues -- but nonetheless, is there a better practice? Is there any good reference for which DirectX structures can safely be shared, and which can't? It appears that RenderLoop.Run calls the render delegate in a tight loop. Is there any standard way to limit the frame rate of RenderLoop.Run, if you don't want a 400FPS app eating 100% of your CPU? Should I just Thread.Sleep(30) in the render delegate? (I asked on the sharpdx.org forums as well, but Alexandre is on vacation for two weeks, and my sister wants me to do a performance with my app at her wedding in three and a half weeks, so I'm mighty incented here! http://robjsoftware.org for details of what I'm building....)

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  • Some VS 2010 RC Updates (including patches for Intellisense and Web Designer fixes)

    - by ScottGu
    [In addition to blogging, I am also now using Twitter for quick updates and to share links. Follow me at: twitter.com/scottgu] We are continuing to make progress on shipping Visual Studio 2010.  I’d like to say a big thank you to everyone who has downloaded and tried out the VS 2010 Release Candidate, and especially to those who have sent us feedback or reported issues with it. This data has been invaluable in helping us find and fix remaining bugs before we ship the final release. Last month I blogged about a patch we released for the VS 2010 RC that fixed a bad intellisense crash issue.  This past week we released two additional patches that you can download and apply to the VS 2010 RC to immediately fix two other common issues we’ve seen people run into: Patch that fixes crashes with Tooltip invocation and when hovering over identifiers The Visual Studio team recently released a second patch that fixes some crashes we’ve seen when tooltips are displayed – most commonly when hovering over an identifier to view a QuickInfo tooltip. You can learn more about this issue from this blog post, and download and apply the patch here. Patch that fixes issues with the Web Forms designer not correctly adding controls to the auto-generated designer files The Visual Web Developer team recently released a patch that fixes issues where web controls are not correctly added to the .designer.cs file associated with the .aspx file – which means they can’t be programmed against in the code-behind file.  This issue is most commonly described as “controls are not being recognized in the code-behind” or “editing existing .aspx files regenerates the .aspx.designer.(vb or cs) file and controls are now missing” or “I can’t embed controls within the Ajax Control Toolkit TabContainer or the <asp:createuserwizard> control”. You can learn more about the issue here, and download the patch that fixes it here. Common Cause of Intellisense and IDE sluggishness on Windows XP, Vista, Win Server 2003/2008 systems Over the last few months we’ve occasionally seen reports of people seeing tremendous slowness when typing and using intellisense within VS 2010 despite running on decent machines.  It took us awhile to track down the cause – but we have found that the common culprit seems to be that these machines don’t have the latest versions of the UIA (Windows Automation) component installed. UIA 3 ships with Windows 7, and is a recommended Windows Update patch on XP and Vista (which is why we didn’t see the problem in our tests – since our machines are patched with all recommended updates).  Many systems (especially on XP) don’t automatically install recommended updates, though, and are running with older versions of UIA. This can cause significant performance slow-downs within the VS 2010 editor when large lists are displayed (for example: with intellisense). If you are running on Windows XP, Vista, or Windows Server 2003 or 2008 and are seeing any performance issues with the editor or IDE, please install the free UIA 3 update that can be downloaded from this page.  If you scroll down the page you’ll find direct links to versions for each OS. Note that we are making improvements to the final release of VS 2010 so that we don’t have big perf issues when UIA 3 isn’t installed – and we are also adding a message within the IDE that will warn you if you don’t have UIA 3 installed and accessibility is activated. Improved Text Rendering with WPF 4 and VS 2010 We recently made some nice changes to WPF 4 which improve the text clarity and text crispness over what was in the VS 2010/.NET 4 Release Candidate.  In particular these changes improve scenarios where you have a dark background with light text. You can learn more about these improvements in this WPF Team blog post.  These changes will be in the final release of VS 2010 and .NET 4. Hope this helps, Scott

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  • ASP.NET AJAX, jQuery and AJAX Control Toolkit&ndash;the roadmap

    - by Harish Ranganathan
    The opinions mentioned herein are solely mine and do not reflect those of my employer Wanted to post this for a long time but couldn’t.  I have been an ASP.NET Developer for quite sometime and have worked with version 1.1, 2.0, 3.5 as well as the latest 4.0. With ASP.NET 2.0 and Visual Studio 2005, came the era of AJAX and rich UI style web applications.  So, ASP.NET AJAX (codenamed “ATLAS”) was released almost an year later.  This was called as ASP.NET 2.0 AJAX Extensions.  This release was supported further with Visual Studio 2005 Service Pack 1. The initial release of ASP.NET AJAX had 3 components ASP.NET AJAX Library – Client library that is used internally by the server controls as well as scripts that can be used to write hand coded ajax style pages ASP.NET AJAX Extensions – Server controls i.e. ScriptManager,Proxy, UpdatePanel, UpdateProgress and Timer server controls.  Works pretty much like other server controls in terms of development and render client side behavior automatically AJAX Control Toolkit – Set of server controls that extend a behavior or a capability.  Ex.- AutoCompleteExtender The AJAX Control Toolkit was a separate download from CodePlex while the first two get installed when you install ASP.NET AJAX Extensions. With Visual Studio 2008, ASP.NET AJAX made its way into the runtime.  So one doesn’t need to separately install the AJAX Extensions.  However, the AJAX Control Toolkit still remained as a community project that can be downloaded from CodePlex.  By then, the toolkit had close to 30 controls. So, the approach was clear viz., client side programming using ASP.NET AJAX Library and server side model using built-in controls (UpdatePanel) and/or AJAX Control Toolkit. However, with Visual Studio 2008 Service Pack 1, we also added support for the ever increasing popular jQuery library.  That is, you can use jQuery along with ASP.NET and would also get intellisense for jQuery in Visual Studio 2008. Some of you who have played with Visual Studio 2010 Beta and .NET Framework 4 Beta, would also have explored the new AJAX Library which had a lot of templates, live bindings etc.,  But, overall, the road map ahead makes it much simplified. For client side programming using JavaScript for implementing AJAX in ASP.NET, the recommendation is to use jQuery which will be shipped along with Visual Studio and provides intellisense as well. For server side programming one you can use the server controls like UpdatePanel etc., and also the AJAX Control Toolkit which has close to 40 controls now.  The AJAX Control Toolkit still remains as a separate download at CodePlex.  You can download the different versions for different versions of ASP.NET at http://ajaxcontroltoolkit.codeplex.com/ The Microsoft AJAX Library will still be available through the CDN (Content Delivery Network) channels.  You can view the CDN resources at http://www.asp.net/ajaxlibrary/CDN.ashx Similarly even jQuery and the toolkit would be available as CDN resources in case you chose not to download and have them as a part of your application. I think this makes AJAX development pretty simple.  Earlier, having Microsoft AJAX Library as well as jQuery for client side scripting was kind of confusing on which one to use.  With this roadmap, it makes it simple and clear. You can read more on this at http://ajax.asp.net I hope this post provided some clarity on the AJAX roadmap as I could decipher from various product teams. Cheers!!!

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