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• vJUG: Worldwide Virtual JUG Created

  - by Tori Wieldt

  London Java Community leader and technical evangelist Simon Maple has created a Meetup called vJUG, with aim toward connecting Java Developers in the virtual world. The aim for vJUG is: Get technical leaders from around the world to present to the vJUG members (without travel cost concerns!). Work with local JUGs to provide worldwide content to their members and help JUGs present to a worldwide audience. Provide content to devs without access to a local JUG. Be a hub that will stream content from other JUG sessions live.  The vJUG is not intended to replace local JUG efforts. "The vJUG can never be, and will never be, as vibrant and valuable to its members as a proper local JUG can. Why? Because the true value in JUG meetings are the face to face interactions and personal networking," said Maple. "However, many people do not have access to a really active JUG with great speakers and awesome content. Or, like me, the closest JUG is about 90 mins away." WebEx and Google Hangouts are great, Maple explained, he hopes vJUG will provide more coordination of online events.  Maple hopes that in the future, vJUG will provide An Events calendar with reminders and links to up coming meetings. A Newsletter with what's coming up and links to previous sessions. Coordination of links to IRC channels which are active during presentations (to create a feeling of virtual community). Comments and forums around sessions and presentations A place where physical JUGs could advertise their sessions (i.e. a NY JUG event) to a worldwide audience, when streamed, via an event that people can sign up to. A common Webex or Hangout. Maple encourages both people who need a JUG and existing JUG members to join vJUG. "I'm looking forward to talking with many of you one to get members, speakers, and JUG support!" Join vJUG now! (I sense a need for a logo...) 

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• iPhone app development pricing [closed]

  - by AlexMorley-Finch

  I currently manage a website design and development company that integrates itself with print work too. I've been co manager for a couple of months now, however business is slow at the moment. I got an email today from a potential client asking if we do iPhone app development. Obviously we do not. But, seeing as there aren't many other project on the go at the moment, why not give it a go? Searching Google was my first option. I did a bit of background scrubbing. Discovered that I need certain developer tools etc. This can be arranged easily enough. The reason I came to Stack Exchange is for answers to these questions. I am a competant programmer and have had experience in Java, PHP, JavaScript, C++ and C#. So how long would it take me to come to grips with Objective-C? Assuming an 8 hour working day. Not only the language but also the iPhone interface libraries (if any exist) and other native libraries? The potential client said the app will be a catalogue. So I'm assuming either the data will be pulled online or in some kind of local database. I know the requirements are vague but does anyone have any idea of how mug time this would take? To learn the language, design the architecture and code? 40 Hours? 80 Hours? My final question kind of depends on the first two. But obviously the potential client wants a quote. And I have got no idea how much an app costs. I did some research and found a huge range in differences. The majority of the cost would cone from the time to develops the app! So to summarise. How long would it take me to be comfortable coding Objective-C, taking into consideration my past knowledge? I'm assuming a day or two to fully understand but you really don't know. How long would it take me to develop an app? How much should I charge (approx) for the development of this app?

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• Can Anything be Done to Make Improv (a 1993 Win 3.1 App) handle larger Files?

  - by user75185

  My very favorite spradsheet is Improv, a 1993 Windows 3.1 application. It still puts Excel to shame for building spreadsheets and writing formulas. The only problem is because Improv was written when 1 Meg of RAM was state of the art, it becomes unstable when working with larger spreadsheets and often crashes and/or corrupts the data file. I am working on a project that greatly exceeds Improv's limits. Although it will ultimately require more robust databasing capability, I could save a lot of critical time if I could delay that headache and continue working in Improv for now. To that end, I moved to the only product I could find that comes close, Quantrix, which is nothing more than Improv updated to handle large spreadsheets and utilize today's technologies. The problems with Quantrix are its speed (significantly slower than Improv) and its $1000 price (which I cannot afford). I have already had 3 15 day extensions after the initial 30 day trial, so my time to use Quantrix as a bridge is at its end. Searches for Improv over the years have gotten me nowhere and, not surprisingly after reading some posts on this site, I got nothing for the money and time invested to find a programmer to write code to "fix" this problem. Improv is freely available as "abandonware" at http://vetusware.com/download/LotusImprov2.1/?id=5797 , and the best background info can be found on Wikipedia and at "Moose's Greatest Software Products of All Time - Lotus Improv" http://moosevalley.fhost.com.au/mooses_review_page_lotus_improv.html It is critically urgent for me to focus on analyzing the data asap. Working in a stable Improv would, without question, be the fastest route. To that end, I am looking for answers to the following questions and anything else that might be helpful: 1) Is it lawful to hire someone to fix Improv for my own use? If so, 2) About how much should it cost? 3) About how long should it take? 4) What skills should I be looking for &/or how should a post be worded? 5) Is there a niche site where it should it be posted? 6) What questions can I ask to quickly screen candidates? Since I am not a programmer, I need questions the answers to which leave no room to confuse me, whether intentional or not. For example, what tools or players should someone with an acceptable competency level have knowledge of?

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• How to be successfull at BDD Specifications Workshops?

  - by sigo

  Today we tried to introduce BDD in our software development process by having a specification workshop. For this workshop we had 2 developers, 1 tester and 1 business analyst. The workshop lasted 1h30 and by the end of it we managed to figure out some BDD scenarios for our new feature. We tried to focus on finding the scenarios that we could miss, and the difficult ones. At the end of the workshop some people were actually unhappy with the workshop. One developer felt he wasted his time as he was used to be given out the scenarios directly by the business analyst and review them with her. The business analyst didn't feel confident with our scenario coverage (Had a feeling that we could have missed out other important stuff) but more importantly felt that this workshop was also a waste of time as she could have figured out all these scenarios by herself and in a shorter period of time. So my question is how that kind of workshop can actually work. In the theory, given you have a new feature to develop, you put the tree 'amigos' (dev/tester/ba) in the same room so that they can collaborate together on writing the differents requirements for the new feature using examples. I can see all the benefits from that. Specially in term of knowledge sharing and common product/end goal/done vision. But in practice, we still think it is more cost effective to first have a BA to work on his own on the examples and only then to have the scenarios to be reviewed/reworked by the 3 'amigos'. By having the BA to work on his own, we actually feel more confident that we are less going to miss out stuff + we still get to review the scenarios afterward to double check. We don't think than simple brainstorming/deliberate discovery is actually enought to seriously cover all the requirement for a feature. The business analyst is actually the best person for that kind of stuff. The thing we just do is to review what she wrote and see if then we have a common understanding (which could then lead to rewrite some of her scenarios or add new ones she could have missed). This workshop lasted 1h30, and by the end of it, we didn't feel confident enought about wha we did...sure we could have spent more time on it but honestly most people get exhausted after 1h30 of brainstorming. So how can you get that to work effectively in practice ?

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• Employer admits that its developers are underpaid and undervalued. Time to part ways?

  - by Psionic

  My employer recently posted an opening for a C# Developer with 3-5 years of experience. The requirements and expectations for the position were fair, up until the criteria for salary determination. It was stated clearly that compensation would depend ONLY on experience with C#, and that years of programming experience with other languages & frameworks would be considered irrelevant and not factored in. I brought up my concern with HR that good candidates would see this as a red flag and steer away. I attempted to explain that software development is about much more than specific languages, and that paying someone for their experience in a single language is a very shortsighted approach to hiring good developers (I'm telling this to the HR dept of a software company). The response: "We are tired of wasting time interviewing developers who expect 'big salaries' because they have lots of additional programming experience in languages other than what we require." The #1 issue here is that 'big salaries' = Market Rate. After some serious discussion, they essentially admitted that nobody at the company is paid near market rate for their skills, and there's nothing that can be done about it. The C-suite has the mentality that employees should only be paid for skills proven over years under their watch. Entry-level developers are picked up for less than $38K and may reach 50K after 3 years, which I'm assuming is around what they plan on offering candidates for the C# position. Another interesting discovery (not as relevant) - people 'promoted' to higher responsibilities do not get raises. The 'promotion' is considered an adjustment of the individuals' roles to better suit their 'strengths', which is what they're already being paid for. After hearing these hard truths straight from HR, I would assume that most people who are looking out for themselves would quickly begin searching for a new employer that has a better idea of what they're doing in the industry (this company fails in many other ways, but I don't want to write a book). Here is my dilemma however: This is the first official software development position I've held, for barely 1 year now. My previous position of 3 years was with a very small company where I performed many duties, among them software development (not in my official job description, but I tried very hard to make it so). I've identified local openings that I'm currently qualified for, most paying at least 50% more than I'm getting now. Question is, is it too soon for a jump? I am getting valuable experience in my current position, with no shortage of exciting projects. The work environment is very comfortable, and I'm told by many that I'm in the spotlight of the C-level guys for the stuff that I've been able to accomplish during my short time (for what that's worth). However, there is a clear opportunity cost to staying, knowing now with certainty that I will have to wait 3-5 years only to be capped at what I could potentially be earning elsewhere this year. I am also aware that 'job hopper' is a dangerous label to have, regardless of the reasons.

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• Building Enterprise Smartphone App &ndash; Part 3: Key Concerns

  - by Tim Murphy

  This is part 3 in a series of posts based on a talk I gave recently at the Chicago Information Technology Architects Group.  Feel free to leave feedback. Keys Concerns Of Smartphones In The Enterprise These are the factors that you need to be aware of and address in order to build successful enterprise smartphone applications.  Most of them have nothing to do with the application itself as you will see here. Managing Devices Managing devices is a factor that is going to effect how much your company will have to spend outside of developing the applications.  How will you track the devices within the corporation?  How often will you have to replace phones and as a consequence have to upgrade your applications to support new phones?  The devices can represent a significant investment of capital.  If these questions are not addressed you will find a number of hidden costs throughout the life of your solution. Purchase or BYOD We have seen the trend of Bring Your Own Device (BYOD) lately within the enterprise.  How many meetings have you been in where someone is on their personal iPad, iPhone, Android phone or Windows Phone?  The issue is if you can afford to support everyone's choice in device? That is a lot to take on even if you only support the current release of each platform. Do you go with the most popular device or do you pick a platform that best matches your current ecosystem and distribute company owned devices?  There is no easy answer here, but you should be able give some dollar value to both hardware and development costs related to platform coverage. Asset Tracking/Insurance Smartphones are devices that are easier to lose or have stolen than laptops and desktops. Not only do you have your normal asset management concerns but also assignment of financial responsibility. You also will need to insure them against damage and theft and add legal documents that spell out the responsibilities of the employees that use these devices. Personal vs. Corporate Data What happens when you terminate an employee?  How do you recover the device?  What happens when they have put personal data on the device?  These are all situation that can cause possible loss of corporate intellectual property or legal repercussions of reclaiming a device with personal data on it.  Policies need to be put in place that protect the company from being exposed to type of loss.  This can mean significant legal and procedural cost that you need to consider. Coming Up In the last installment of this series I will cover application development considerations. del.icio.us Tags: Smartphones,Enterprise Smartphone Apps,Architecture

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• Why C++ people loves multithreading when it comes to performances?

  - by user1849534

  I have a question, it's about why programmers seems to love concurrency and multi-threaded programs in general. I'm considering 2 main approach here: an async approach basically based on signals, or just an async approach as called by many papers and languages like the new C# 5.0 for example, and a "companion thread" that maanges the policy of your pipeline a concurrent approach or multi-threading approach I will just say that I'm thinking about the hardware here and the worst case scenario, and I have tested this 2 paradigms myself, the async paradigm is a winner at the point that I don't get why people 90% of the time talk about concurrency when they wont to speed up things or make a good use of their resources. I have tested multi-threaded programs and async program on an old machine with an Intel quad-core that doesn't offer a memory controller inside the CPU, the memory is managed entirely by the motherboard, well in this case performances are horrible with a multi-threaded application, even a relatively low number of threads like 3-4-5 can be a problem, the application is unresponsive and is just slow and unpleasant. A good async approach is, on the other hand, probably not faster but it's not worst either, my application just waits for the result and doesn't hangs, it's responsive and there is a much better scaling going on. I have also discovered that a context change in the threading world it's not that cheap in real world scenario, it's infact quite expensive especially when you have more than 2 threads that need to cycle and swap among each other to be computed. On modern CPUs the situation it's not really that different, the memory controller it's integrated but my point is that an x86 CPUs is basically a serial machine and the memory controller works the same way as with the old machine with an external memory controller on the motherboard. The context switch is still a relevant cost in my application and the fact that the memory controller it's integrated or that the newer CPU have more than 2 core it's not bargain for me. For what i have experienced the concurrent approach is good in theory but not that good in practice, with the memory model imposed by the hardware, it's hard to make a good use of this paradigm, also it introduces a lot of issues ranging from the use of my data structures to the join of multiple threads. Also both paradigms do not offer any security abut when the task or the job will be done in a certain point in time, making them really similar from a functional point of view. According to the X86 memory model, why the majority of people suggest to use concurrency with C++ and not just an async aproach ? Also why not considering the worst case scenario of a computer where the context switch is probably more expensive than the computation itself ?

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• Core i7-620M vs Core i5-540M

  - by Shalan

  Hi, I'm recommending a laptop to a colleague, and the specific laptop he has chosen has the above CPU chips as options. Both chips have 2-cores/4-threads. The i7-620M is a 2.66 GHz (4MB Cache) while the i5-540M is a 2.53 GHz (3MB Cache)....both Arrandale architecture. He is a .NET programmer working with SQL Server and Oracle, and occasionally uses Adobe Fireworks for web-related design elements. He also loves playing around in Adobe Premiere Pro, and does a lot of media/video work. Would you notice any significant performance difference between the 2? The laptop manufacturer claims that the battery life on both is the same irrespective of the chip used (although I find that hard to believe), but there is a major cost difference between them, with the Core i7-620M being the more expensive. According to http://ark.intel.com, the one thing that seems different (besides the obvious speeds/frequencies/etc) is a feature called "Embedded" - what is this exactly? You can see the quick comparison here - http://ark.intel.com/Compare.aspx?ids=43544,43560 I would sincerely appreciate any advice me on this. THANKS!

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• RouterOS on Hyper-V (v3/2012) - any way to get it working?

  - by TomTom

  Trying to set up a small VPN point to connect into a remote Hyper-V cluster using ROuterOS. Anyone got it working ON Hyper-V with the latest builds of RouterOS? It seems the legacy network adapter is not supported anymore either (or just broken). The platform is a Windows Server 2012 RC. This is not a high performance setup - the RouterOS wont do the routing for more than the backend administrative access, and the only real traffic we will see there is when ISO images for new operating systems are uploaded. Otherwise we will have possibly RDP traffic as well as web / http traffioc, but this is internal only (dashboards, some control panel). The server has no public business. So the price for non virtualized network cards is ok for me. After hooking up - ping just does not work. After some time I see in windows (arp -a on the command line), so I know that the Hyper-V side is set up properly. Just no packets arrived. I have turned off all protection on Hyper-V (or : not turned them on), so no MAC spoofing protection etc. in the Advanced page for the legacy adapters. Unless I can get it work I will have to resort to using a windows install as router / VPN endpoint, which introduces another OS into the fabric (we run all routers etc. so far on mikrotik in hardware, which is why I want this one to be RouterOS, too). And no, putting hardware there is NOT an option - the cost would be significant.

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• Windows web server and SQL Server on same dedicated server

  - by asinc

  I'm currently trying to decide on the best approach to handle hosting a few moderate traffic websites for production e-commerce and online applications. We'd like to move to a dedicated server and are looking at this as the most likely machine: Quad Core Intel Core2Quad Q9550 Processor, 2.83 Ghz X 4, 4 GB Kingston Ram This would run Windows Web Server 2008 R2 x64 and potentially also Sql Server Web 2008 and SmarterMail server. Given that we already pay for a high-end VPS for development, testing, shared version control we'd like to avoid going with two servers for production. We'd like to avoid using shared sql server hosting and have thought of using the development server as the database server as an option too - but potentially a security risk due to use for development by internal and contract users. The questions are: - Do you feel there would be performance degradation by running this on the same machine? - Are there significant issues to be concerned about if we do this? We understand that best practice would be to run separate db and app servers but the volume of traffic is currently not that high and adding another server just for database is currently too costly. - What are others doing out there? Alternatively, would you recommend instead going with two separate VPS servers with 2GB RAM each on Hyper-v which would be about the same cost as the single dedicated server above? Thanks!

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• MultiView 2000 terminal emulator not printing correctly to Generic/Text Printer on Windows 7

  - by FantaFan

  Guys & gals, Hope someone can shed some light on this. I am downloading reports from an AIX-based system by directing them to a TT printer which the terminal emulator (MultiView 2000) intercepts and directs to the default printer on the local system. This local printer is configured as a vanilla Generic/Text printer attached to a FILE port. When I print from AIX, the output is spooled down and the local printer prompts for a file name into which to save the file...but not under Windows 7. This has worked fine for many years, on both Win2K and WinXP. However, on Windows 7 the output gets spooled as a file into spool\PRINTERS (and looks as expected) but the print job then hangs with a status of "Error - Printing" and never prompts for a file name. I have to cancel the job. The Generic/Text printer works as expected with other applications. I have tried setting the printer to print directly rather than spooling but this only serves to hang the terminal session too. I've also tried to run the emulator in Windows 2000 Compatibility Mode and as Administrator in case it was something like that but with no luck. As you might expect, it does work fine in XP Mode (as long as I print to a printer defined therein and not the host's printer) but operationally this isn't going to be an option. Obviously this emulation software is a decade old (at least) and I could just cross/upgrade all the users (at a cost) but, before I do so, has anyone seen this sort of behaviour before and found some sort of fix? Remote OS: AIX 5 Client OS: Windows 7 Pro (32-bit) Printer: Generic/Text on a FILE port TE Software: MultiView 2000 (320-bit) Thanks in advance.

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• Generic/Text Printer on Windows 7 not prompting for file name

  - by FantaFan

  Guys & gals, Hope someone can shed some light on this. I am downloading reports from an AIX-based system by directing them to a TT printer which the terminal emulator (MultiView 2000) intercepts and directs to the default printer on the local system. This local printer is configured as a vanilla Generic/Text printer attached to a FILE port. When I print from AIX, the output is spooled down and the local printer prompts for a file name into which to save the file...but not under Windows 7. This has worked fine for many years, on both Win2K and WinXP. However, on Windows 7 the output gets spooled as a file into spool\PRINTERS (and looks as expected) but the print job then hangs with a status of "Error - Printing" and never prompts for a file name. I have to cancel the job. The Generic/Text printer works as expected with other applications. I have tried setting the printer to print directly rather than spooling but this only serves to hang the terminal session too. I've also tried to run the emulator in Windows 2000 Compatibility Mode and as Administrator in case it was something like that but with no luck. As you might expect, it does work fine in XP Mode (as long as I print to a printer defined therein and not the host's printer) but operationally this isn't going to be an option. Obviously this emulation software is a decade old (at least) and I could just cross/upgrade all the users (at a cost) but, before I do so, has anyone seen this sort of behaviour before and found some sort of fix? Remote OS: AIX 5 Client OS: Windows 7 Pro (32-bit) Printer: Generic/Text on a FILE port TE Software: MultiView 2000 (32-bit) Thanks in advance.

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• Windows Server 2008 / SQL 2008 Licensing for Authenticated Web Application

  - by MikeM

  Hello, I'm trying to crunch some numbers to see what the software costs involved are for hosting an application we are developing. Users will not be anonymous - they will need to log in. SQL Server 2008: SQL Server licensing is easy - it will be licensed per-processor. No real fuss there. The cost of CALs would be much higher for the number of users as compared to the processor licenses. Windows Server 2008: This is where it gets trickier. We need to license the OS for both the web servers (there will be a couple) plus the database servers (also a couple). The Web Servers could run on the Web Edition without a need for CALs, but if you continue reading, you will see that may not matter much because I will likely have user CALs for each user anyway. We can't use the "External Connector" for any of the Windows licenses, because that doesn't cover customers who are paying to access a hosted application. We can't use the Web Edition for the SQL Servers because that license only allows database running on Web Edition to host data for the local web application (i.e. other web servers can't connect to it). So that leaves us with the "full" editions of Windows Server for the database server OS. I find this a little rediculous, and I feel as though I must be missing something, but it looks to me like I will actually need to buy a CAL for every user who signs up to use our service. I feel like I'm missing something because that means that for every user, I have to shell out $40 for a CAL. That could be one or two years' worth of revenue from each user for an inexpensive service! Is there any way to serve a web application to authenticated users without paying for individual Windows Server CALs, if the web servers and SQL servers are seperate boxes?

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• KVM recommendations

  - by alex

  I recently tried out a cheaper KVM solution, a dual monitor one with a USB hub and audio/mic support. It seemed the perfect KVM. However, these are my experiences. When using my keyboard via the PS/2 connection, none of my multimedia keys work (useful, because it has a volume control and my speakers do not, only on a wireless remote control.) I plugged the keyboard in via the USB port - and it seemed to work. However, I believe to switch the hub from PC to Mac, you need to use a keyboard combo, which is only supported when the keyboard is plugged in via PS/2 Sometimes the middle mouse button doesn't work when connected via PS/2. The multi monitor is VGA - I just found out by the looks of things my Mac Mini outputs DVI Digital only (though this is my fault!). Mac works with 2 screens, but switching and switching back can cause it not to display on the 2nd screen unless I go detect displays again. My question is - is there a KVM out there that supports these features? USB keyboard and mouse inputs will full multimedia keys support Dual monitor DVI connections Hotkey to change PCs and physical button USB hub Emulate screens attached when switching to a different computer Works with PC and Mac Audio / Microphone support Does one exist, that won't cost the world? So far the only one that seems to support all this (that I can tell) is this one. UPDATE I ended up buying the Aten CS1642. It's expensive, but it seems to work great!

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• pfSense Firewall or Linsys/Cisco router for small offices

  - by Tim Meers

  I'm about to start switching some networks around for multiple small offices. Each office has about 10 to 15 users and 10 to 15 computers. Each office has a spread of generic routers and access points. The routers vary from being used as routers, to just being an access point for wireless. Nothing formal has really ever beem implemented for each of the 10 offices. What I'm wanting is to set up a pfSense box for each office to configure things like: traffic shaping (for VoIP QOS) URL Filtering DHCP static routing multiple VLANs I'll then use some of the existing hardware for wireless. Maybe even integrate the wireless right into the firewall depending on the office layout. So my question, would this be better to do a full blown firewall box, or but a new business class or high end consumer class Linksys router to do the URL filtering, QOS and DHPC? Each option could allow for remote access and VPN for remote maintnance and each would only cost a nominal about of money for something decent, i.e. under $250.

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• Outgrew MongoDB … now what?

  - by samsmith

  We dump debug and transaction logs into mongodb. We really like mongodb because: Blazing insert perf document oriented Ability to let the engine drop inserts when needed for performance But there is this big problem with mongodb: The index must fit in physical RAM. In practice, this limits us to 80-150gb of raw data (we currently run on a system with 16gb RAM). Sooooo, for us to have 500gb or a tb of data, we would need 50gb or 80gb of RAM. Yes, I know this is possible. We can add servers and use mongo sharding. We can buy a special server box that can take 100 or 200 gb of RAM, but this is the tail wagging the dog! We could spend boucoup $$$ on hardware to run FOSS, when SQL Server Express can handle WAY more data on WAY less hardware than Mongo (SQL Server does not meet our architectural desires, or we would use it!) We are not going to spend huge $ on hardware here, because it is necessary only because of the Mongo architecture, not because of the inherent processing/storage needs. (And sharding? Please! Cost aside, who needs the ongoing complexity of three, five, or more servers to manage a relatively small load?) Bottom line: MongoDB is FOSS, but we gotta spend $$$$$$$ on hardware to run it? We sould rather buy commercial SW! I am sure we are not the first to hit this issue, so we ask the community: Where do we go next? (We already run Mongo v2) Thanks!!

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• Does any Certificate Authority support both SAN and wildcards?

  - by nicholas a. evans

  My basic quandry is that wildcard certificates don't support subdomains of subdomains, nor do they help with alternate domain names. Basically, if my CN is example.com, I want a Subject Alternative Name field that looks roughly like so: DNS:example.com DNS*.example.com DNS:*.beta.example.com DNS:example.net DNS:*.example.net DNS:*.beta.example.net Using a self-signed cert, I verified that the browsers will work just fine with this. Unfortunately, none of the Certificate Authorities that I looked into (Thawte, GoDaddy, Verisign, Digicert) seemed to support both wildcard certs and Subject Alternative Name (sometimes referred to as "Multiple Domain UCC"). I even called up GoDaddy tech support to confirm. Is there a CA (trusted by 99% of browsers) that supports wildcards for the Subject Alternative Name? One little restriction: I'm saddled with Amazon EC2's single Elastic IP per instance limitation. Here are what I see as my backup plans: set up three extra EC2 instances, each configured for a different IP address and cert, and nginx reverse proxy from three of them into the app server(s) introduces latency(?), and even the cheapest EC2 instance isn't that cheap instead of dedicated reverse proxy instances, setup the four or more almost identical EC2 app servers, with nginx using the port to determine which cert to deliver, and use haproxy to distribute the traffic amongst themselves. complicated to configure and manage? I'm not using the cheapest EC2 instance type for my app servers. If I don't need 4+ app servers for the load, it raises the cost. set up an external server (outside of EC2) that doesn't have EC2's Elastic IP address restrictions, setup all of the alternate IP addresses and certificates on that server, and nginx reverse proxy from that server into the EC2 app servers. extra IP addresses are almost free (still need to pay for the server of course), but don't come with the robust "elasticity" that Amazon's Elastic IPs provide. even more latency than in the first scenario. Are these approaches crazy or reasonable? Do you have another one to suggest?

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• Hardware for a home server running Windows Server 2008 R2 Hyper-V or Microsoft Hyper-V Server 2008 R2

  - by David Hayes

  Hi, I'm planning to build a server to do the following Act as a file server (videos, pictures music) Run Squeezebox server Run Zune Software to allow wireless syncing to Windows Phone 7 I'd also like to aim for Low power usage (i'd settle for less than the 90-100Watts I'm using atm Flexibility, I might want to add a web server or sharepoint or... Something I can learn/test on, work is mainly a Windows shop but I do have Linux experience too I'd like to take a look at App-V (application virtualization) too I'd like it to cost less than $1000 Quiet would be nice but not essential (it'll be in the basement) I'm thinking of getting a technet subscription to get access to Windows Server 2008 R2 at a reasonable price ($199) So my plan was this Get a bunch of 2TB Caviar green drives to RAID up (RAID 1 or 6 probably) Get a Quad core CPU (Intel i5/i7 probably) Install a Hypervisor Install w2k8 R2 Storage Server for a NAS Install Windows 7 Pro to run Zune/Squeeze box Install any other machines I want to play with Questions Can anyone see any issues with this or have any better ideas? Do you think I'd need an i7 over an i5? Is 4 cores enough/too much? Can anyone sugest a nice, reasonably priced case that will hold 6-8 drives and stay cool Should I wait for Sandy Bridge parts?

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• HP ProCurve & Cisco switches interoperability

  - by Kamil Z

  I have a couple of questions regarding Cisco and HP ProCurve interoperability. Here's a link to pdf with my network topology. Can someone help me with basic VLAN configuration in such topology? Below there are some details of my configuration: # m_management_2 interface FastEthernet0/43 switchport access vlan 250 switchport mode access spanning-tree port-priority 32 spanning-tree cost 100 # MTA2-swmgmt1 vlan 1 name "DEFAULT_VLAN" untagged 1-48 ip address 10.10.249.190 255.255.255.128 exit # MTA2-swtr1 vlan 1 name "DEFAULT_VLAN" untagged 1-14,16-48 no ip address no untagged 15 exit vlan 100 name "MTA Mgmt" untagged 15 ip address 10.10.249.188 255.255.255.128 exit # MTA2-swtr2 vlan 1 name "DEFAULT_VLAN" untagged 1-14,16-48 no ip address no untagged 15 exit vlan 100 name "MTA Mgmt" untagged 15 ip address 10.10.249.189 255.255.255.128 exit I don't post MTA2-bcsw[12] configuration, because I wasn's successfull in this one yet. Every time I configure VLANs on MTA2-bcsw[12] Fa0/24 interface on m_management_2 goes down bacause of receiving tagged BPDUs on access port (there are no VLANs configured on MTA2-swmgmt1 because of fact that only 250 VLAN is allowed in this switch. Is it correct?). Can someone provide me some basic configuration for this topology? Second thing I want to ask is concept of connection from MTA2-swmgmt1 to MTA2-swtr[12] HP switches for the sake of management. How to configure such ports on HP switches (managed switch and manager switch). Is my actual configuration correct?

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• Why datacenter water cooling is not widespread?

  - by MainMa

  From what I read and hear about datacenters, there are not too many server rooms which use water cooling, and none of the largerst datacenters use water cooling (correct me if I'm wrong). Also, it's relatively easy to buy an ordinary PC components using water cooling, while water cooled rack servers are nearly nonexistent. On the other hand, using water can possibly (IMO): Reduce the power consumption of large datacenters, especially if it is possible to create direct cooled facilities (i.e. the facility is located near a river or the sea). Reduce noise, making it less painful for humans to work in datacenters. Reduce space needed for the servers: On server level, I imagine that in both rack and blade servers, it's easier to pass the water cooling tubes than to waste space to allow the air to pass inside, On datacenter level, if it's still required to keep the alleys between servers for maintenance access to servers, the empty space under the floor and at the ceiling level used for the air can be removed. So why water cooling systems are not widespread, neither on datacenter level, nor on rack/blade servers level? Is it because: The water cooling is hardly redundant on server level? The direct cost of water cooled facility is too high compared to an ordinary datacenter? It is difficult to maintain such system (regularly cleaning the water cooling system which uses water from a river is of course much more complicated and expensive than just vacuum cleaning the fans)?

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• Why do AWS spot-instance prices spike above the "on demand" pricing?

  - by Laykes

  Amazon Pricing on Spot Instance Inconsistencies This is something which will be best explained through screenshots of a historical chart of instance pricings. If you look at a lot of the instance prices for spot instances, you will notice regular patterns of spikes. See here: As you can see, the price for this compute medium instance, regularly spikes above the on demand price. A c1.medium instance (on demand), would only cost $0.186 per hour. But for a period of a few weeks, in zone B, the price would regularly spike to $1.20. This is some 6 times the actual on demand price. It's also not isolated. If you look at zone-b again for small instances, there is a similar, spike frequently. Which goes 4x the on demand pricing. Does anyone know why this happens? Here are a few suggestions Someone entered $1.2 instead of $0.12 (I would discount this since it happened 20 times over the space of 3 weeks). Amazon regularly artifically inflate their prices by bidding on their own instances to get the most bang for their buck. (I would discount this since it would be ridiculous and bad business) Some company launched 1000 servers at once, and wants to make sure that they all launch. (I would discount this since they would presumably launch them at a price which would be below the minimum on demand price. Why would you pay above on demand for a single server?). It's a bug in their reporting?

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• Disabling mouse acceleration in Mac OS X

  - by aib

  I've been looking for a solution to the unusable mouse problem in Mac OS X for ages. I've tried a gazillion programs and fiddled with every setting there is or there can be added. So far, I haven't found a way to get linear mouse response in Mac OS X. At this point I'm seriously considering installing another operating system. But before I do that, or go hacking around OS binaries, maybe someone here has a solution? I want linear mouse response. I want high sensitivity. I like my touchpad acceleration and would like to keep it if possible. Any ideas? P.S. I've been at this for a long time, I'll probably have already tried the most popular answers. I'm running Mac OS X 10.6.5 on a MacBook Pro. I don't use a particular brand of mouse. I'm not looking for any commercial solutions. I've tried: Mouse Acceleration Preferences Pane, the Snow Leopard version of which can get me close to a linear response, but at the cost of tracking speed (sensitivity). Answers on this question: Make Mac OS X mouse acceleration more Windows-like About every code snippet I found via Google.

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• Amazon AWS EC2 + Puppet, get Puppet to know AWS instance tags

  - by Piotr Jasiulewicz

  I am having a problem with my AWS deployment, fairly new to AWS and Puppet. So coming to my question - can you distinguish puppet nodes with AWS machine tags or CNAME domains? A little background about the plan: have multiple clusters of machines, one php cluster, one legacy php cluster, one java cluster, one perl cluster control configuration with puppet - still pretty new to puppet but as a developer I like the idea of being able to version control configuration of servers have autoscaling enabled on those clusters - obviously the main benefit of the cloud that makes the much hight cost when it comes to any reasonable performance worth it (those amazon machines are slower than my phone...) deployment controlled by Capistrano, this makes things a lot easier So in AWS you get those super nasty public/private machine dns's... no way you can identify machines on those. In order to easer the problem, seams like AWS want's you to tag everything - so I did. Found a script that makes a CNAME record for each machine with the tag "ShortName" thanks to the Route53 API. Every machine has a ShortName tag that becomes its CNAME, unfortunately puppet still resolves the private dns name. I'd like to have node 'perl-cluster'{} in puppet, anyone any clue ho to achieve this? Thanks

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• Hardware Requirements & Tuning - Flash Media Server 3.5 Interactive

  - by Anthony Kanago

  I am trying to spec out a server to purchase (physically, not rented from someone like softlayer.com) to run an intranet instace of Flash Media Server 3.5 Interactive. In general, the server will likely be fielding somewhere on the order of 400 connections at a time at the upper limit. Of course, should this increase, we don't want to be stuck. While the decision is not final, we will likely be running the server on Red Hat rather than Windows. The server will be run on gigabit ethernet. I have two related questions: What sort of hardware would I need realistically to support this? What advice can you offer for settings in tuning FMS/the OS to be performant to this level? We are looking for a bare minimum that will run this effectively to save on costs. Realistically, the average number of connections will be fairly low (50-150) by comparison with that upper limit estimate. To reiterate: we just want to be cautious in not getting caught when we need more power, but we also need a low-cost solution (doesn't everyone?) and that may take priority. Windows and RedHat are the two officially supported operating systems. Since FMS is stated to be 32-bit only, I'm sticking with a 32-bit OS. The hardware requirements listed by Adobe on their website are: 3.2GHz Intel® Pentium® 4 processor (dual Intel Xeon® or faster recommended) 2GB of RAM (4GB recommended) 1Gb Ethernet card So what realistically do I need for those sorts of connection numbers, and what can I due to tune things up to get more out of less hardware? Thanks!

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• I cannot format my PC

  - by Jesus Buelna

  I have a Toshiba Satellite(1) l505 6gb RAM, 6.00GB hard disk.Initially I have problem with another satellite(2) I had (mother board problem). I took my Laptop to a technician and cost a lot of money (almost as much as buying new one). So, since I have HDD problems with the first one(1) I decided to use the hard disk of the other one(2). I formatted the HDD and erased the partitions it had into 1 partition (or no partition). The problem is that when I try to format with the SO CD, in the screen, where I have to decide in which partition I want to install the SO, the only one option I have says "unallocated partition and I receive this message "Windows cannot install the SO in this partition, run files do not existed or maybe corrupted" When I erased the disk with Parted Magic, Did I erased any files needed for running the installing disk? I don't know. Is it possible to fixed or reinstate the disk to install the OS? By the way, I checked the disk physical health with Parted Magic, and it is OK. One more thing when I erased the disc to 0, I used the safety option offered by the Parted Magic.Need help please.

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