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  • Single SignOn - Best practice

    - by halfdan
    Hi Guys, I need to build a scalable single sign-on mechanism for multiple sites. Scenario: Central web application to register/manage account (Server in Europe) Several web applications that need to authenticate against my user database (Servers in US/Europe/Pacific region) I am using MySQL as database backend. The options I came up with are either replicating the user database across all servers (data security?) or allowing the servers to directly connect to my MySQL instance by explicitly allowing connections from their IPs in my.cnf (high load? single point of failure?). What would be the best way to provide a scalable and low-latency single sign-on for all web applications? In terms of data security would it be a good idea to replicate the user database across all web applications? Note: All web applications provide an API which users can use to embed widgets into their own websites. These widgets work through a token auth mechanism which will again need to authenticate against my user database.

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  • Count of memory copies in *nix systems between packet at NIC and user application?

    - by Michael_73
    Hi there, This is just a general question relating to some high-performance computing I've been wondering about. A certain low-latency messaging vendor speaks in its supporting documentation about using raw sockets to transfer the data directly from the network device to the user application and in so doing it speaks about reducing the messaging latency even further than it does anyway (in other admittedly carefully thought-out design decisions). My question is therefore to those that grok the networking stacks on Unix or Unix-like systems. How much difference are they likely to be able to realise using this method? Feel free to answer in terms of memory copies, numbers of whales rescued or areas the size of Wales ;) Their messaging is UDP-based, as I understand it, so there's no problem with establishing TCP connections etc. Any other points of interest on this topic would be gratefully thought about! Best wishes, Mike

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  • Two SATA HDDs connected using a Black Duet HDD Docking Station via eSATA to my Laptop, second drive

    - by leeand00
    Hi I am using a BlacX Duet HDD Docking Station to connect a 1TB WD Caviar Black SATA HDD (WD10000LSRTL) and a HITACHI SATA DESKSTAR (0S00163) to my G51VX (BestBuy) laptop via the eSATA port. When I plug in both HDDs in to the Docking Station, connect the docking station to my laptop and start Windows 7 (64-bit Ultimate), only the HDD in the first drive in the port actually shows up in My Computer and Disk Management. If I swap the drives positions I can get them both to work, but never at the same time. I also checked in the bios settings on the laptop, under Advanced-IDE Configuration-SATA Operation Mode, and it displays: SATA Operation Mode: [Enhanced] AHCI Port0 [Hard Disk] Device: Hard Disk Vendor: ST9320421AS LBA Mode: Supported S.M.A.R.T.: Supported AHCI Port5 [Hard Disk] Device: Hard Disk Vendor: Hitachi HDS721010CLA332 Size: 100.00 GB LBA Mode: Supported S.M.A.R.T.: Supported There should be a third drive, but I'm not certain why it is not being picked up. Additionally, before I played around with the settings in the IDE configuration, it used to display the DVD as well.

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  • Copy Windows 7 environment running on external drive to a new HDD partition on a Mac?

    - by sam
    My PC has just given up on me. It's getting a bit old so I took the HDD out and bought a Mac. I've put the PC's HDD into an enclosure, plugged it into the Mac and dragged across most of my files. I've got a couple of programs that are PC-only that I have to run from time to time, so I'd like to make a partition on the Mac and have Windows 7 installed there. I know how to set up a clean version of Windows in Boot Camp. Is there an easy way to copy over the environment on the HDD to the Mac's partition? I don't really need all the stuff on the PC, just the operating system. Is there a better way to do this other than having to deactivate Windows, then reactivate it on the Mac? I have a free upgrade to Windows 7 from Vista, thus I have an upgrade disc, not the full disc.

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  • Windows boots to Black Screen of Death — Is my HDD faulty?

    - by Flynn1179
    My wife's PC suddenly stopped booting up properly. It gets as far as the Windows 'loading' screen with the bar scrolling away, but that's as far as it gets for some time, then suddenly flashes up a BSoD barely long enough to see, then the display cuts out. We've got identical PCs, and after swapping components, I established that my PC suffers the same problem if I swap in the HDD. Even if I plug hers in as a second HDD on my machine, it still does the same thing, even though it's booting from mine. I can't even boot her machine from CD or DVD either, so I couldn't even use a recovery disc. I did manage to partially boot my PC into safe mode with the other HDD attached, and it got as far as loading 'crcdisk.sys' and froze. Anybody know what could be wrong with it, or at least how I can get the data off the disk? I'm assuming there's still data on the disk, given that it at least shows me the vista 'loading' screen.

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  • How to Recover HDD Formatted by "Create a Recovery Drive" Tool of Windows 8.1?

    - by ide
    I have 2 TB USB HDD which had these drives F: about 1 TB with 750 GB data H: about 120 GB with 60 GB data I: about 780 GB with 250 GB data (For TV: It was raw in Windows but visible in the Smart TV) I took 521 MB from last part of H to get new G drive. Then I run "Create a Recovery Drive" tool of Windows 8.1 and chose G drive. It said all data in the drive will be deleted. I thought it is just G drive but it deleted my whole HDD. It created 32 GB new F drive with writing 337 MB on it and rest of HDD is unallocated. I tried these programs to get my first 3 drives but non of them helped for getting 1st partition. TestDisk MiniTool Partition Wizard Home Edition EaseUS Partition Master 9.2.2 (I deleted new F drive volume because it scans only unallocated part) Recuva PC Inspector File Recovery

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  • Raspberry Pi: mvoe home & var folders to USB HDD?

    - by doni49
    I have a Raspberry Pi running raspian. I've installed Apache2, PHP & MySQL. Apache & MySQL are both configured to use sub-directories of /var. I'd like to use a directory on my USB HDD instead of my SD card. I'd also like to move the /home directory to the USB HDD. I'd like to avoid re-partioning my HDD if possible. I thought maybe I could use a symlink to tell raspian that /var is really at /media/USBHDD1/var and /home is really at /media/USBHDD1/home. I tried it last night but couldn't get it to work.

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  • What's the best way to format an external HDD for both OSX and Windows ?

    - by George Profenza
    I have an external HDD (1TB) and I'd like to use it on OSX and Windows. I had another external HDD using NTFS and I used NTFS-3G on osx to write files, but I found the reading/writing very slow. Googling a bit I see many people recommend HFS+ in conjuction with HFS Explorer for Windows. Is this the best way ? Is it possible to have two partitions, one HFS+ and one NTFS ? Is it a good option or is it better to use one partition ? I've seen this thread on using UDF for USB flash drive. Would that be suited for an USB external HDD ?

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  • How can I mount an image from an external HDD to a partition within the host system?

    - by HardwareMuch
    I'm currently using Acronis True Image Home 2010 and I have created an image of my Windows 7 OS. I copied it to my external HDD and I repartitioned my other PC's HDD. The primary partition houses the Windows Xp system which also has Acronis installed. The new partition is logical. Whenever I try to go through the steps on "Clone Disk" the program would not let me select a destination drive if I choose the external HDD as the source. I also did not know that it you can only select disks instead of partitions as a source or destination. Any suggestions would be greatly appreciated. Thanks.

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  • Can I recover data from external HDD or do I format and lose it all?

    - by Col
    I have a Maxtor external HDD 500GB but haven't used it for a year or so. I have plugged it into a new laptop as the one I used it with before is busted. I know that there is a ton of data on the HDD that I would love to have the use of - mostly family and friends photos to be honest. But when I click on the HDD in Windows Explorer the only option I am given is to reformat the drive and lose the data. I'd be grateful if anyone could tell me if there is a way to get the data off the external drive before formatting it and losing it all.

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  • Migrating a running production server to Xen, unmodified as a second HDD?

    - by DaveCol
    I have a production server which I am looking to virtualize via XEN. For this purpose I have purchased a new Sata HDD, in which I have promptly installed CentOS 5.5 x64 with XEN server installed. Now I have two HDD: /dev/sda1 running as host with Xen Server Installed; and /dev/sda2 which is the HDD where the original server has installed. Is it posible to use /dev/sda2 to work as GuestOS in a xen server? Would I have to modify its kernel? Thank you for any input

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  • How do I backup (from Vista Home Premium) to a FAT32 HDD connected to a wireless router with no user account or password set?

    - by Scubadooper
    I have a Seagate expansion 2TB HDD which I've managed to get working on my wireless router (thanks to fat32format) however I haven't managed to set my backup to work with it. Vist Home Premium requires that I input a username and password in the backup utility. As far as I'm aware that type of access control isn't set on the HDD: Can I set up the access control on the HDD? If so how Or, can I set the backup to work without it? If so how Thanks for your help, I haven't been able to find the answer anywhere on the net so far

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  • Is it possible to have two HDD's, and both be primary?

    - by qwerty2
    Here is my configuration: C: - system/Windows XP HDD D: - empty I just added a new hard drive (D) and formatted it and made it a primary HDD. Since then Windows hasn't been able to boot. Is the computer able to have both the system and the new HDD as primary? If not, then that is why Windows isn't booting. If it IS possible, then I have no idea what the problem is. Any help or thoughts would be fantastic! thanks!

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  • Computing "average" of two colors

    - by Francisco P.
    This is only marginally programming related - has much more to do w/ colors and their representation. I am working on a very low level app. I have an array of bytes in memory. Those are characters. They were rendered with anti-aliasing: they have values from 0 to 255, 0 being fully transparent and 255 totally opaque (alpha, if you wish). I am having trouble conceiving an algorithm for the rendering of this font. I'm doing the following for each pixel: // intensity is the weight I talked about: 0 to 255 intensity = glyphs[text[i]][x + GLYPH_WIDTH*y]; if (intensity == 255) continue; // Don't draw it, fully transparent else if (intensity == 0) setPixel(x + xi, y + yi, color, base); // Fully opaque, can draw original color else { // Here's the tricky part // Get the pixel in the destination for averaging purposes pixel = getPixel(x + xi, y + yi, base); // transfer is an int for calculations transfer = (int) ((float)((float) (255.0 - (float) intensity/255.0) * (float) color.red + (float) pixel.red)/2); // This is my attempt at averaging newPixel.red = (Byte) transfer; transfer = (int) ((float)((float) (255.0 - (float) intensity/255.0) * (float) color.green + (float) pixel.green)/2); newPixel.green = (Byte) transfer; // transfer = (int) ((float) ((float) 255.0 - (float) intensity)/255.0 * (((float) color.blue) + (float) pixel.blue)/2); transfer = (int) ((float)((float) (255.0 - (float) intensity/255.0) * (float) color.blue + (float) pixel.blue)/2); newPixel.blue = (Byte) transfer; // Set the newpixel in the desired mem. position setPixel(x+xi, y+yi, newPixel, base); } The results, as you can see, are less than desirable. That is a very zoomed in image, at 1:1 scale it looks like the text has a green "aura". Any idea for how to properly compute this would be greatly appreciated. Thanks for your time!

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  • How can I eliminate latency in quicktime streamed video

    - by JJFeiler
    I'm prototyping a client that displays streaming video from a HaiVision Barracuda through a quicktime client. I've been unable to reduce the buffer size below 3.0 seconds... for this application, we need as low a latency as the network allows, and prefer video dropouts to delay. I'm doing the following: - (void)applicationDidFinishLaunching:(NSNotification *)aNotification { NSString *path = [[NSBundle mainBundle] pathForResource:@"haivision" ofType:@"sdp"]; NSError *error = nil; QTMovie *qtmovie = [QTMovie movieWithFile:path error:&error]; if( error != nil ) { NSLog(@"error: %@", [error localizedDescription]); } Movie movie = [qtmovie quickTimeMovie]; long trackCount = GetMovieTrackCount(movie); Track theTrack = GetMovieTrack(movie,1); Media theMedia = GetTrackMedia(theTrack); MediaHandler theMediaHandler = GetMediaHandler(theMedia); QTSMediaPresentationParams myPres; ComponentResult c = QTSMediaGetIndStreamInfo(theMediaHandler, 1,kQTSMediaPresentationInfo, &myPres); Fixed shortdelay = 1<<15; OSErr theErr = QTSPresSetInfo (myPres.presentationID, kQTSAllStreams, kQTSTargetBufferDurationInfo, &shortdelay ); NSLog(@"OSErr %d", theErr); [movieView setMovie:qtmovie]; [movieView play:self]; } I seem to be getting valid objects/structures all the way down to the QTSPres, though the ComponentResult and OSErr are both returning -50. The streaming video plays fine, but the buffer is still 3.0seconds. Any help/insight appreciated. J

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  • why my ubuntu always runs on low-grahphic mode?

    - by sam
    My graphic card is NVIDIA GTX 460, and ubuntu is ubuntu 10.04. I have reinstalled graphic driver for two times,but my ubuntu shows that it runs on low-graphic mode after a period of time of driver installation process. The following is the information the computer shows. http://imgur.com/GkZUz Also, when I try to change the graphic setting of NVIDIA on ubuntu, the following information shows. http://imgur.com/SVhCc How to fix it?Thank you!!

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  • Will low level programms become obsolete once the "post-performance" world arives? [closed]

    - by nbv4
    With the new iPhone 5 being as powerful as the supercomputers of the 1980s, its only a matter of time when the latest phones will be powerful enough to run a twitter-scale web application from within my pocket. When that time comes, performance will no longer be something programmers need to care about. Will low level languages still have a place? Or will everyone move to dynamic languages like Python?

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  • 4 month old 500 GB SATA HDD making noise?

    - by metal gear solid
    My 4 month old 500 GB SATA HDD making noise sometimes and the PC hangs when it makes noise when the noise stops desktop work fine. It doesn't happen every day but it does happen. Is something wrong with HDD, Data, power cable, or my cabinet's power supply? Should I run scandisk or defragmentation on the disk.

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  • Can I put a SATA2 HDD into a laptop supporting SATA1?

    - by user22559
    I have a laptop that supports SATA1 (1.5 GB/sec) The HDD for it has bad sectors, and I want to buy another one. It seems that where I live, SATA1 notebook HDDs aren't really available (only if you wait for a few weeks for them to be delivered), and they cost more than SATA2 HDDs. So I was wondering if I buy a SATA2 (3GB/sec) HDD, will it work without problems on my laptop? The laptop is an HP Pavilion DV6000

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  • UPS - Two computers - How to get them to both shutdown when battery is low?

    - by hamlin11
    Short Version: How do I get 2 computers to shutdown when a UPS battery gets low? Long Version: I have an APC UPS, the RS 1500. It has a USB cord that goes into my main dev computer. My dev computer will shutdown when the battery gets low. However, in addition, I have now hooked up a database server to the same UPS. How can I have that database server also know that it needs to shut down when the battery gets low?

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  • How to workaround or diagnose a kernel panic when "safely removing" external hdd?

    - by Shawn
    I'm experiencing an issue when using the "Safely Remove" option to remove my 1TB external HDD from the Unity Launcher. Not every time, but occasionally my screen will go black and display LARGE amounts of text information (which I obviously cannot screen cap). The jist of the info displayed is that unmounting or 'safely removing' the drive causes a kernel panic. Is there a Command Line command to remove mounted drives, or at least one that would show me some sort of error output when the drive is removed? I'm trying to narrow down the cause. I could be imagining this, but it seems to happen most often when I have other programs running when I remove the drive (i.e. Firefox, Transmission). Please note that my external drive is not in use when I attempt to remove it and it is not being used either by Firefox or Transmission at these times. Any help would be appreciated.

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  • How to install Edubuntu on a system with low memory (256 Mb)?

    - by int_ua
    I'm preparing an old system with 256 Mb RAM to send it to some children. It doesn't have Ethernet controller and there are no Internet access at the destination. I've chosen Edubuntu for obvious reasons and modified it with UCK trying to minimize memory usage just to install, let alone using it yet. But Ubiquity won't start even in openbox (edited /etc/lightdm/lightdm.conf) because there are no space left on /cow right after booting. I've already deleted things like ibus, zeitgeist, update-manager (no network access after all), twisted-core, plymouth logos. I'm thinking about creating a swap partition on HDD, can it be later added to expand this /cow ? Is there a package for the text-mode installation which is used on Alternate CDs? I don't want to re-create Edubuntu from an Alternate CD. This behavior is reproducible in VM limited to 256Mb RAM.

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  • New PeopleSoft HCM 9.1 On Demand Standard Edition provides a complete set of IT services at a low, predictable monthly cost

    - by Robbin Velayedam
    At Oracle Open World last month, Oracle announced that we are extending our On Demand offerings with the general availability of PeopleSoft On Demand Standard Edition. Standard Edition represents Oracle’s commitment to providing customers a choice of solutions, technology, and deployment options commensurate with their business needs and future growth. The Standard Edition offering complements the traditional On Demand offerings (Enterprise and Professional Editions) by focusing on a low, predictable monthly cost model that scales with the size of your business.   As part of Oracle's open cloud strategy, customers can freely move PeopleSoft licensed applications between on premise and the various  on demand options as business needs arise.    In today’s business climate, aggressive and creative business objectives demand more of IT organizations. They are expected to provide technology-based solutions to streamline business processes, enable online collaboration and multi-tasking, facilitate data mining and storage, and enhance worker productivity. As IT budgets remain tight in a recovering economy, the challenge becomes how to meet these demands with limited time and resources. One way is to eliminate the variable costs of projects so that your team can focus on the high priority functions and better predict funding and resource needs two to three years out. Variable costs and changing priorities can derail the best laid project and capacity plans. The prime culprits of variable costs in any IT organization include disaster recovery, security breaches, technical support, and changes in business growth and priorities. Customers have an immediate need for solutions that are cheaper, predictable in cost, and flexible enough for long-term growth or capacity changes. The Standard Edition deployment option fulfills that need by allowing customers to take full advantage of the rich business functionality that is inherent to PeopleSoft HCM, while delegating all application management responsibility – such as future upgrades and product updates – to Oracle technology experts, at an affordable and expected price. Standard Edition provides the advantages of the secure Oracle On Demand hosted environment, the complete set of PeopleSoft HCM configurable business processes, and timely management of regular updates and enhancements to the application functionality and underlying technology. Standard Edition has a convenient monthly fee that is scalable by number of employees, which helps align the customer’s overall cost of ownership with its size and anticipated growth and business needs. In addition to providing PeopleSoft HCM applications' world class business functionality and Oracle On Demand's embassy-grade security, Oracle’s hosted solution distinguishes itself from competitors by offering customers the ability to transition between different deployment and service models at any point in the application ownership lifecycle. As our customers’ business and economic climates change, they are free to transition their applications back to on-premise at any time. HCM On Demand Standard Edition is based on configurability options rather than customizations, requiring no additional code to develop or maintain. This keeps the cost of ownership low and time to production less than a month on average. Oracle On Demand offers the highest standard of security and performance by leveraging a state-of-the-art data center with dedicated databases, servers, and secured URL all within a private cloud. Customers will not share databases, environments, platforms, or access portals with other customers because we value how mission critical your data are to your business. Oracle’s On Demand also provides a full breadth of disaster recovery services to provide customers the peace of mind that their data are secure and that backup operations are in place to keep their businesses up and running in the case of an emergency. Currently we have over 50 PeopleSoft customers delegating us with the management of their applications through Oracle On Demand. If you are a customer interested in learning more about the PeopleSoft HCM 9.1 Standard Edition and how it can help your organization minimize your variable IT costs and free up your resources to work on other business initiatives, contact Oracle or your Account Services Representative today.

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  • Install/running ubuntu on extarnal HDD with a windows laptop?

    - by Peter
    Sorry for asking, especially as I've trawled through many similar questions. Mine is of the most basic element I think as this kind of thing is really out of my ball park. Anyway I wanted to if by installing ubuntu on my old laptop hdd (I now use it as external storage), can I run it on my laptop which has windows installed. I can't take the chance of installing on the laptop as I'm currently studying, and I have a years worth of work on here (most backed up elsewhere), and will be using it a lot. However there are some programmes I can use if I can get ubuntu that will be helpful for one or two classes. Sorry for the very basic question.

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