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  • learn dbms online

    - by siva
    Hi I want to learn DBMS including the concepts of complex SQL writing and normalisation and other stuff. Can anyone please help me to find some useful online resources.....

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  • Best free online Computer Science college courses

    - by Spiker
    I have found the MIT Open Courseware to be a great resource for free computer science college courses. Every software engineer should be required to take the Structure and Interpretation of Computer Programs class. Berkeley and Carnegie Mellon also provide some great online courses. Are there any more colleges that offer quality computer science courses?

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  • Online PHP/HTML/JS/CSS editor

    - by pistacchio
    Hi to all, is there any free php code that, once installed, allows you to browse and edit files (with html, javascript, php and css highlight) on the server where it's installed? The aim is to code online, browser based. I've tried http://phpanywhere.net/ that can make this possible, but it is buggy and moreover it requires an external (ftp) access to your server that is quite different (and less secure) that working directly on the server. Thanks in advance

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  • self-hosted online photo editor?

    - by PulledBull
    I am looking for an online photo editor like http://services.snipshot.com (Javascript) or picnik.com/info/api (Flash) but I need one that I can host on my own server.. been searching for a while but no results.. any ideas? I also love the idea behind pixenate.com/productinfo/Overview.html but its so expensive.

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  • Google Closure minifier online?

    - by Geuis
    Has anyone setup an online copy/paste utility for Google's Closure minifier? I'm working on a project and I want to minify part of the code manually without having to setup the entire project on my own.

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  • The SPARC SuperCluster

    - by Karoly Vegh
    Oracle has been providing a lead in the Engineered Systems business for quite a while now, in accordance with the motto "Hardware and Software Engineered to Work Together." Indeed it is hard to find a better definition of these systems.  Allow me to summarize the idea. It is:  Build a compute platform optimized to run your technologies Develop application aware, intelligently caching storage components Take an impressively fast network technology interconnecting it with the compute nodes Tune the application to scale with the nodes to yet unseen performance Reduce the amount of data moving via compression Provide this all in a pre-integrated single product with a single-pane management interface All these ideas have been around in IT for quite some time now. The real Oracle advantage is adding the last one to put these all together. Oracle has built quite a portfolio of Engineered Systems, to run its technologies - and run those like they never ran before. In this post I'll focus on one of them that serves as a consolidation demigod, a multi-purpose engineered system.  As you probably have guessed, I am talking about the SPARC SuperCluster. It has many great features inherited from its predecessors, and it adds several new ones. Allow me to pick out and elaborate about some of the most interesting ones from a technological point of view.  I. It is the SPARC SuperCluster T4-4. That is, as compute nodes, it includes SPARC T4-4 servers that we learned to appreciate and respect for their features: The SPARC T4 CPUs: Each CPU has 8 cores, each core runs 8 threads. The SPARC T4-4 servers have 4 sockets. That is, a single compute node can in parallel, simultaneously  execute 256 threads. Now, a full-rack SPARC SuperCluster has 4 of these servers on board. Remember the keyword demigod.  While retaining the forerunner SPARC T3's exceptional throughput, the SPARC T4 CPUs raise the bar with single performance too - a humble 5x better one than their ancestors.  actually, the SPARC T4 CPU cores run in both single-threaded and multi-threaded mode, and switch between these two on-the-fly, fulfilling not only single-threaded OR multi-threaded applications' needs, but even mixed requirements (like in database workloads!). Data security, anyone? Every SPARC T4 CPU core has a built-in encryption engine, that is, encryption algorithms cast into silicon.  A PCI controller right on the chip for customers who need I/O performance.  Built-in, no-cost Virtualization:  Oracle VM for SPARC (the former LDoms or Logical Domains) is not a server-emulation virtualization technology but rather a serverpartitioning one, the hypervisor runs in the server firmware, and all the VMs' HW resources (I/O, CPU, memory) are accessed natively, without performance overhead.  This enables customers to run a number of Solaris 10 and Solaris 11 VMs separated, independent of each other within a physical server II. For Database performance, it includes Exadata Storage Cells - one of the main reasons why the Exadata Database Machine performs at diabolic speed. What makes them important? They provide DB backend storage for your Oracle Databases to run on the SPARC SuperCluster, that is what they are built and tuned for DB performance.  These storage cells are SQL-aware.  That is, if a SPARC T4 database compute node executes a query, it doesn't simply request tons of raw datablocks from the storage, filters the received data, and throws away most of it where the statement doesn't apply, but provides the SQL query to the storage node too. The storage cell software speaks SQL, that is, it is able to prefilter and through that transfer only the relevant data. With this, the traffic between database nodes and storage cells is reduced immensely. Less I/O is a good thing - as they say, all the CPUs of the world do one thing just as fast as any other - and that is waiting for I/O.  They don't only pre-filter, but also provide data preprocessing features - e.g. if a DB-node requests an aggregate of data, they can calculate it, and handover only the results, not the whole set. Again, less data to transfer.  They support the magical HCC, (Hybrid Columnar Compression). That is, data can be stored in a precompressed form on the storage. Less data to transfer.  Of course one can't simply rely on disks for performance, there is Flash Storage included there for caching.  III. The low latency, high-speed backbone network: InfiniBand, that interconnects all the members with: Real High Speed: 40 Gbit/s. Full Duplex, of course. Oh, and a really low latency.  RDMA. Remote Direct Memory Access. This technology allows the DB nodes to do exactly that. Remotely, directly placing SQL commands into the Memory of the storage cells. Dodging all the network-stack bottlenecks, avoiding overhead, placing requests directly into the process queue.  You can also run IP over InfiniBand if you please - that's the way the compute nodes can communicate with each other.  IV. Including a general-purpose storage too: the ZFSSA, which is a unified storage, providing NAS and SAN access too, with the following features:  NFS over RDMA over InfiniBand. Nothing is faster network-filesystem-wise.  All the ZFS features onboard, hybrid storage pools, compression, deduplication, snapshot, replication, NFS and CIFS shares Storageheads in a HA-Cluster configuration providing availability of the data  DTrace Live Analytics in a web-based Administration UI Being a general purpose application data storage for your non-database applications running on the SPARC SuperCluster over whichever protocol they prefer, easily replicating, snapshotting, cloning data for them.  There's a lot of great technology included in Oracle's SPARC SuperCluster, we have talked its interior through. As for external scalability: you can start with a half- of full- rack SPARC SuperCluster, and scale out to several racks - that is, stacking not separate full-rack SPARC SuperClusters, but extending always one large instance of the size of several full-racks. Yes, over InfiniBand network. Add racks as you grow.  What technologies shall run on it? SPARC SuperCluster is a general purpose scaleout consolidation/cloud environment. You can run Oracle Databases with RAC scaling, or Oracle Weblogic (end enjoy the SPARC T4's advantages to run Java). Remember, Oracle technologies have been integrated with the Oracle Engineered Systems - this is the Oracle on Oracle advantage. But you can run other software environments such as SAP if you please too. Run any application that runs on Oracle Solaris 10 or Solaris 11. Separate them in Virtual Machines, or even Oracle Solaris Zones, monitor and manage those from a central UI. Here the key takeaways once again: The SPARC SuperCluster: Is a pre-integrated Engineered System Contains SPARC T4-4 servers with built-in virtualization, cryptography, dynamic threading Contains the Exadata storage cells that intelligently offload the burden of the DB-nodes  Contains a highly available ZFS Storage Appliance, that provides SAN/NAS storage in a unified way Combines all these elements over a high-speed, low-latency backbone network implemented with InfiniBand Can grow from a single half-rack to several full-rack size Supports the consolidation of hundreds of applications To summarize: All these technologies are great by themselves, but the real value is like in every other Oracle Engineered System: Integration. All these technologies are tuned to perform together. Together they are way more than the sum of all - and a careful and actually very time consuming integration process is necessary to orchestrate all these for performance. The SPARC SuperCluster's goal is to enable infrastructure operations and offer a pre-integrated solution that can be architected and delivered in hours instead of months of evaluations and tests. The tedious and most importantly time and resource consuming part of the work - testing and evaluating - has been done.  Now go, provide services.   -- charlie  

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  • Fixed income data online

    - by John Smith
    I am looking for a resource to download fixed income data online, much like there is access to stock data from yahoo. At the very least I'd like the treasury bonds. I use python, but any help would be appreciated.

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  • Online Screenshot Generator for Mac

    - by BillB
    I'm looking for a free online web page screenshot generator that will take photos of Mac browsers. I've looked at: BrowsrCamps BrowserShots LitmusApp All of which I'm sure are good but charge for a screenshot of your web app using a Mac browser. Does anyone know of a free alternative.

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  • books or online resources to prepare for .NET interviews for senior developer role

    - by RKP
    Hi, can you suggest some good books or online resources (FAQ or articles) to prepare for .NET interviews (.NET concepts, ASP.NET, C# etc) for senior developer role? something to refresh the concepts, not too much detailed. there could be stuff I haven't done before (that applies to everyone), so at least knowing little bit about it, will definitely help. google search shows me some website with lots of QA, but they are not authentic (I found some answers inaccurate). thanks in advance.

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  • Inform me when site (server) is online again

    - by dede
    When I ping one site it returns "Request timed out". I want to make little program that will inform me (sound beep or something like that) when this server is online again. No matter in which language. I think it should be very simple script with a several lines of code. So how to write it?

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  • Online editing gettext files?

    - by NeoNmaN
    Online editing gettext files, is it possible? I use gettext for all my PHP projects, but sides with a minor problem, want to mine user may translate my language from as Danish to Norwegian, but in this case it enste I know is that I need to export my file from Poedit there is any. other software that can export / import my files? for Poedit can I do with export as. hope i could help me a little.

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  • Online java training

    - by sezhian
    I am looking for online webbased/CBT training/self study training videos for Java EE related technologies like Struts, JSF, JPA, Websphere, Spring and Hibernate. I'm using learndevnow for Microsoft related technologies. It's really good, I am looking for similar thing for Java EE. Any suggestions please?

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  • Online Collaborative Schema Design (leverage google docs?)

    - by AK
    I'm looking for an online, collaborative schema designer. It's important that it can handle revisions (history of changes). This looks cool, and I could host it on a server - but doesn't look like it would handle multi-user: http://ondras.zarovi.cz/sql/demo/ Currently we're doing a lot of design collaboration on google docs/spreadsheets. Has anyone had any success using google spreadsheet for schema design? Even if there were just a gadget for drawing lines/connections, I might give Google Docs a shot.

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  • Drawing lattices online

    - by lavabo
    This isn't really a programming question but... Is there any way to draw online a lattice for a material, like a compound? i.e. a 3D gridlike pattern? I know there are some applications for drawing mathematical lattices, but the notation to me is unfamiliar - are there simply programs or applets or something for drawing lattices like in a compound?

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  • capturing user identity for an online application

    - by Samuel
    We are designing an online application (college admission form) which mandates the user to upload a scanned copy of his photo along with his signature, so that this information can be used to cross verify the applicant when he appears for a exam + personal interview at a later point in time. This entire process requires a scanner for the applicant to scan his photo / signature into an appropriate size. Is there a better way to capture user identity for such purposes as usage of scanner for capturing signature, photo is a painful process.

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  • Auto refresh when new user comes online

    - by Luke
    Hello. I have a table in the database which includes all active users. I then have a user list which needs refreshing to see who is the latest users online. Whats the best way to tackle this? The user list is always just who is in the active_users table. Thanks for reading.

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  • problem downloading movie to iphone for storage and playback

    - by padatronic
    I am basically making a video library where you download videos and I then write them to the applications documents folder. This all works fine and if i stream the video from online it plays fine. Or indeed I can stream it from the resource folder fine. However, after downloading it and saving to the documents folder then attempting to stream I get the error 'movie format not supported' any ideas? thanks very much

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  • Is there any online free movie information api's?

    - by Gary Willoughby
    For music there is the Gracenote CDDB SDK, etc. but does an online service exist for getting information about movies? The only solution i can see at the minute is querying IMDB and scraping the page. The problem i have is that i have a list of film titles and i want to retrieve stuff like the plot, director, cast, when released, get dvd cover art, etc..

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