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  • Architecture for dashboard showing aggregated stats [on hold]

    - by soulnafein
    I'd like to know what are common architectural pattern for the following problem. Web application A has information on sales, users, responsiveness score, etc. Some of this information are computationally intensive and or have a complex business logic (e.g. responsiveness score). I'm building a separate application (B) for internal admin tasks that modifies data in web application A and report on data from web application A. For writing I'm planning to use a restful api. E.g. create a new entity, update entity, etc. In application B I'd like to show some graphs and other aggregate data for the previous 12 months. I'm planning to store the aggregate data for each month in redis. Some data should update more often, e.g every 10 minutes. I can think of 3 ways of doing this. A scheduled task in app B that connects to an api of app A that provides some aggregated data. Then app B stores it in Redis and use that to visualise pages. Cons: it makes complex calculation within a web request, requires lot's of work e.g. api server and client, storing, etc., pros: business logic still lives in app A. A scheduled task in app A that aggregates data in an non-web process and stores it directly in Redis to be accessed by app B. A scheduled task in app A that aggregates data in a non-web process and uses an api in app B to save it. I'd like to know if there is a well known architectural solution to this type of problems and if not what are other pros/cons for the solution I've suggested?

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  • Mobile (Client) to Amazon S3 (Server) - Architecture

    - by wasabii
    let's start off with the problem statement: My iOS application has a login form. When the user logs in, a call is made to my API and access granted or denied. If access was granted, I want the user to be able to upload pictures to his account and/or manage them. As storage I've picked Amazon S3, and I figured it'd be a good idea to have one bucket called "myappphotos" for instance, which contains lots of folders. The folder names are hashes of a user's email and a secret key. So, every user has his own, unique folder in my Amazon S3 bucket. Since I've just recently started working with AWS, here's my question: What are the best practices for setting up a system like this? I want the user to be able to upload pictures directly to Amazon S3, but of course I cannot hard-code the access key. So I need my API to somehow talk to Amazon and request an access token of sorts - only for the particular folder that belongs to the user I'm making the request for. Can anyone help me out and/or guide me to some sources where a similar problem was addressed? Don't think I'm the first one and the amazon documentation is so extensive that I don't really know where to start looking. Thanks a lot!

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  • Examples of different architecture methodologies

    - by Lane
    Is there a resource or site which illustrates building the same application (desktop or web) using several different contrasting architectures? Such as MVP versus MVVM versus MVC, etc. It would be very helpful to see how they look side-by-side using real-world code instead of comparing written theory to written theory. I've often found that something can be described well in a book, but when you go to implement it, the subtleties and weaknesses of the theory become readily apparent.

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  • Computer can't boot

    - by zETO
    I have a 1 year old PC and the last weeks, when I press the ON button the PC doesn't power on ( Like I didn't press the ON button ). I have to plug and unplug a few times the power cord in order to make it work. At the start this happened once in 10 boots. Now it happens much more frequently to the point that when I press the power on button it never even opens if I don't do the cord switch thingy. Very rarely also, the PC shut downs for no reason and no warning, even when idle. The important fact to note here is, the green light on the motherboard is always on, even when the PC doesn't power on. What should I do? Is it a Power Supply failure or a motherboard? My power supply is a high end corsair model, AX850 and my motherboard a high end ASUS.

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  • Laptop accessories for mobile warrior (light power adapter & case/bag)

    - by wonsungi
    Lugging my X301 between work and home, I realized my laptop's accessories weigh more than the laptop itself! I'm ordering a 2nd AC power adapter so I don't even have to carry one at all, but I may as well get the lightest one possible. My X301 came with a pretty svelt 65W power adapter, but can anyone suggest a lighter power adapter or confirm the weights I've found below? mass vol dimensions W Model ---- ------- ----------- --- ------------------- 210g 149cm^3 108x46x30mm 65W Coolermaster [NA 65] 244g 189cm^3 140x75x18mm 65W ThermalTake [ADP65W0001] 260g 130cm^3 104x43x29mm 65W Lenovo (came with X301) 326g 198cm^3 145x76x18mm 95W Coolermaster [SNA 95] 330g 180cm^3 150x60x20mm 90W Kensington USB [K38030US] Apple's 60W power adapter seems much smaller/lighter than the PC products listed above, so I think a better PC power adapter could exist. There are much smaller 45W "netbook" adapters, but are these too weak for my X301? I would not mind if it just meant the battery couldn't charge while the laptop was on, but I am afraid there will be worse consequences. Also, I have decided to swap my Logitech Kinetik briefcase for a Tom Bihn Ristretto. Less protection, but much lighter, less bulky, and easier to carry. Any suggestions for better laptop cases/bags?

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  • How to power a serial port under linux?

    - by Lex
    I got a serial to ethernet device connected to a Serial (COM) port on a Linux machine (debian etch), I connected it correctly but it did not power up, I suppose I need to power the device port, anyone knows how to power it under linux? Thankyou in advance.

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  • Docking station power adapter is not recognized by my Dell notebook

    - by Soner Gönül
    At this morning, my laptop (Dell Latitude e6410) gave me this error. I didn't do anything, I didn't change anything. And I got this docking station just 2 month ago. I made a little research on the internet but I couldn't find read solution for this situation. Now my docking station is not charging to my laptop. I'm using Windows 7. What should I do in this situation ? Your docking station power adapter is not recognized by your Dell notebook. As a result, your power adapter may not provide sufficient power to run the system, your battery will not charge, your system will run slowly. Please insert a 65 watt Dell approved power adapter.

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  • Too much power for 1-2 power outlets in my room?

    - by jasondavis
    I live in the USA, I am curious about plugging in too many computer items into 1 to 2 power plugin outlets. Most power outlets have 2 plugins, some have 4 and more though. Many people will plug in a power strib/bar into 1 of these outlets so that they can plugin even more items. So if I have 2 plugins near my computer, would it be bad to plugin... - My PC - 3-4 monitors - Stereo amp for PC sound - Lamp - External drives - other similar items

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  • Too much power for 1-2 power outlets in my room?

    - by jasondavis
    I live in the USA, I am curious about plugging in too many computer items into 1 to 2 power plugin outlets. Most power outlets have 2 plugins, some have 4 and more though. Many people will plug in a power strib/bar into 1 of these outlets so that they can plugin even more items. So if I have 2 plugins near my computer, would it be bad to plugin... - My PC - 3-4 monitors - Stereo amp for PC sound - Lamp - External drives - other similar items

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  • Laptop Power down.

    - by BENBUN
    This question relates to my ACER laptop running Windows VISTA. Currently when I close the lid of my laptop the laptop does not power down, however when I open the lid it does. When looking at the power settings it is set to power down when closing the lid. The trigger to this seems to be the lid being opened not being closed. I seem to recall this behaviour changing when I installed Windows Media centre. Any ideas on how I can get the power down to work on the lid closing. thanks

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  • Laptop Power down.

    - by BENBUN Coder
    This question relates to my ACER laptop running Windows VISTA. Currently when I close the lid of my laptop the laptop does not power down, however when I open the lid it does. When looking at the power settings it is set to power down when closing the lid. The trigger to this seems to be the lid being opened not being closed. I seem to recall this behaviour changing when I installed Windows Media centre. Any ideas on how I can get the power down to work on the lid closing. thanks

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  • Does lighter wallpaper consumes lesser power than a Darker one

    - by Lamb
    My VAIO advised me to switch to a White Background, to reduce power consumption. But it seems contradictory to common logic. Its like saying a brighter Torch consuming less than a dimmer one. Common Logic says that, Screen is BLACK when not using any POWER, so displaying black color should not consume any power (because without powering any pixel it gives black color) Also a white screen gives me more light than a darker one, so it should use more Energy. White Wallpaper = More Light Output = More Electrical Energy Consumed Black Wallpaper = Less Light = Less Electricity Consumed My question is - Is there anything wrong with the above argument ? A Lighter Wallpaper consumes less power than a Darker one. Is it true ? If yes, Why ?

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  • Power Supply Not Working?

    - by Mr.Glass
    So I recently made some purchases for a new computer including: Motherboard: Gigabyte GA-EP45-UD3R CPU : Intel Core2Quad 2.66Ghz Power Supply: Antec Basiq 500w UPDATE: I got the Power Supply working, the motherboard's lights come on, the video card fan spins, BUT the CPU fan does NOT spin and there is no video. Whats the possibility of lacking power? In the mobo guide it says the use of a power supply providing a 2x4 12V connector is recommended (I do not have this connector) by the CPU manufacturer when using an Intel Extreme Edition (I'm using Core2Quad) UPDATE: Got it working, intstalling windows 7 now. THANKS GUYS!!

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  • power equation for RAM

    - by kashyapa
    How is the dynamic power consumption of memory determined . Can anybody give a canonical equation for power consumption of the RAM. What are the parameters involved in determing the dynamic power consumption of RAM ? Thanks in advance

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  • windows 7 monitor instantly resumes from power off

    - by user167328
    It seems that some service or program is preventing my monitor from going into power save mode but I cannot find a way to dig down the cause. Does anybody know a way to find out which event may be causing the problem? Background information: If I leave/lock my computer I want to immediately power off the monitor. Stupid windows has no program for this so I use a third party utility. I use Display.exe from Noel Danjou since 2005 and have had no problem with it on XP, my Notebook with w7 x64 pro and at the office with w7 x64 enterprise. With my new home pc with w7 x64 pro the monitor goes off but instantly comes back on after a second. So I tested using a power plan with the shortest timeout of 1 minute but with that the display never goes off at all. (Setting a power plan timeout is no useful option because then I cannot read a document or watch a movie without the monitor going off) I could try trial and error methods but this is cumbersome and not what I regard as a professional solution. So I would prefer a way to analyze the windows events to find out the reason for the display staying active. Add On: In the meantime I tried safe mode and also exited from all tray programs but the problem is still there. I also checked the BIOS for special power settings but still no solution (P.S. Mobo is H87-G41 PC Mate with latest BIOS rev.)

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  • DISK BOOT FAILURE after upgrading power supply

    - by Phenom
    After upgrading my power supply, I get the following error message when trying to boot into Windows 7. DISK BOOT FAILURE, INSERT SYSTEM DISK AND PRESS ENTER My Windows 7 installation is on a SATA hard drive. I'm able to fix this problem if I hook up my IDE hard drive, then it boots the SATA hard drive fine. I don't like this solution though because then that means my IDE hard drive is drawing power even though it isn't being used. Why would a newer power supply need the IDE hard drive hooked up just to boot into the SATA hard drive? There are no boot files on the IDE hard drive; it is completely empty. My old power supply did not need it hooked up in order to boot the SATA hard drive.

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  • Hp pavilion dv7 power button

    - by Danny B
    My power button is non responsive I am getting LED for charging. I've taken it apart before to change the dc jack and it was fine and a few months later it just powered off. I try to power back on and is goes to start up then shuts off. I just took it apart and came to find the ribbon cable connecting the power button/speakers cover is barely hanging on do I have to replace the whole thing or is there a way to replace the ribbon cable?

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  • I modified my registry and now my laptop doesn't report its battery or power settings

    - by Crouch
    I saved a backup of my registry and then made a change to it. After the change, the Windows 7 battery meter no longer reported how much battery power was left. I also was no longer able to change between Power Profiles in the Control Panel. I tried to restore the original registry but it didn't restore the lost power features. Now I have to keep my laptop plugged in all day because I never know how much power I have left. Anyone know what to do here?

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  • Workaround for Dell "Power Supply Not Recognised" issue

    - by Haedrian
    So, I have a Dell Inspirion and the power supply port appears to be damaged. Basically when I plug it in I get a nice popup telling me that it couldn't detect that its a Dell power supply so it won't charge the battery and underclocks the system. It still works for other purposes (that is, giving power) I thought it was the actual power supply cable so I bought a new one, that worked for a while, provided I inserted it at JUST THE RIGHT angle. But now that's not working anymore, so I assume its the part which connects to the computer. The battery charging I can live without, the underclocking I can't. I'd like a way around this issue. Things I've tried: Updating the BIOS Replacing the power supply cable Inserting it at different angles Turning it off and on again Swearing at it Twisting it while inserting it So, is there a workaround somehow? I'd like to avoid taking out my soldering kit and risking permanently damaging expensive equipment if that's allright. I'm hoping for a software solution. Added: The exact model is a Del Inspirion N5010

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  • ATX power: 20 or 24 pins?

    - by djechelon
    What is the difference between 20-pins ATX power cables and 24-pins ATX power cables for motherboard? I see that Cooler Master Silent Pro PSU has an extensible plug, showing 20 pins + 4 pluggable pins. Since I'm having troubles with my motherboard, which has 24 pins, I tried to connect only the first 20 and the system booted up fine. I'm curious: can any ATX motherboard run with 20-pins power? Will I simply experience lower performance?

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  • Growing Into Enterprise Architecture

    - by pat.shepherd
    I am writing this post as I am in an Enterprise Architecture class, specifically on the Oracle Enterprise Architecture Framework (OEAF).  I have been a long believer that SOA’s key strength is that it is the first IT approach that blends or unifies business and technology.  That is a common view and is certainly valid but is not completely true (or at least accurate).  As my personal view of EA is growing, I realize more than ever that doing EA is FAR MORE than creating a reference architecture, creating a physical architecture or picking a technology to standardize on.  Those are parts of the puzzle but not the whole puzzle by any stretch. I am now a firm believer that the various EA frameworks out there provide the rigor and structure required to allow the bridging of business strategy / vision to IT strategy / vision. The flow goes something like this: Business Strategy –> Business / Application / Information / Technology Architecture –> SOA Reference Architecture –> SOA Functional Architecture.  Governance is imbued throughout to help map, measure and verify the business-to-IT coherence. With those in place, then (and only then) can SOA fulfill it’s potential to be more that an integration strategy, more than a reuse strategy; but also a foundation for tying the results of IT to business vision. Fortunately, EA is a an ongoing process that it is never too late to get started with an understanding of frameworks such as TOGAF, FEA, or OEAF.  Also, EA is never ending in that it always needs to be apply, even once a full-blown Enterprise Architecture is established it needs to be constantly evolved.  For those who are getting deeper into EA as a discipline, there is plenty runway to grow as your company/customer begins to look more seriously at EA. I will close with a pointer to a Great Book I have recently read on this subject: Enterprise Architecture as Strategy (http://www.amazon.com/Enterprise-Architecture-Strategy-Foundation-Execution/dp/1591398398/ref=sr_1_1?ie=UTF8&s=books&qid=1268842865&sr=1-1)

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  • MGE UPS Cut power - What happened?

    - by JT.WK
    I have 3 x MGE Pulsar M 3000 2700w UPS units within my server room which have run perfectly up until now. On Saturday morning I noticed that one of these UPS units was no longer outputting power, the lcd displayed a message saying "load not powered" and told me to press the power button to start output. Needless to say that the servers, switches and routers is was supporting were all turned off. I tried pressing and even holding the power button, but the unit refused to start back up again. Only power cycling the unit got it back up again. I have checked the logs on the UPS, although they were useless. Nothing out of the ordinary, and no email notifications had been sent. The output level sits on about 51% and all battery checks are OK. It is now three days on and the UPS is still up and running (although I am scheduling an outage to get it out of there ASAP). Does anyone have any idea what could have gone wrong here? Is there anything else that I can check that could help?

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  • Self-Resetting Power Strips?

    - by Justin Scott
    We are about to deploy a number of secure kiosks into an environment where they may be prone to lightning strikes and power surges on a somewhat regular basis (southern Florida in a place where the existing electrical infrastructure is, shall we say, a bit out of date). Ideally we would use battery backups on each system, but it's not in the budget. We plan to use a standard power strip with a circuit breaker built-in to protect the computers, but management has asked if there is a power strip that can reset itself after the breaker has been tripped. I've looked around and wasn't able to find such a beast, and it seems to me that it would probably be a safety issue for such a product to exist (e.g. if something plugged into the strip is drawing a lot of current and trips the breaker, you wouldn't want that resetting itself to prevent a possible fire). Nevertheless, if anyone has experience with such a product or can point me in the direction of something that would allow the breakers to be reset automatically or remotely (we don't want to have to send someone to each kiosk every time there is a power surge) I would appreciate any tips.

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